213-650: The South China Sea is a marginal sea of the Western Pacific Ocean . It is bounded in the north by South China , in the west by the Indochinese Peninsula , in the east by the islands of Taiwan and northwestern Philippines (mainly Luzon , Mindoro and Palawan ), and in the south by Borneo , eastern Sumatra and the Bangka Belitung Islands , encompassing an area of around 3,500,000 km (1,400,000 sq mi). It communicates with
426-715: A South Sea slave at the eve of an important ceremonial state sacrifice. The Champa civilization and what would later be the Sultanate of Sulu which was still Hindu at that time and known as Lupah Sug , which is also in the Philippines, engaged in commerce with each other which resulted in merchant Chams settling in Sulu from the 10th-13th centuries, establishing trading centers. There they were called Orang Dampuan and, due to their wealth, many of them were killed by native Sulu Buranuns. The Buranun were then subjected to retaliatory killings by
639-517: A biodiverse range of larger and smaller animal life. Light is only able to penetrate the top 200 metres (660 ft) so this is the only part of the sea where plants can grow. The surface layers are often deficient in biologically active nitrogen compounds. The marine nitrogen cycle consists of complex microbial transformations which include the fixation of nitrogen , its assimilation, nitrification , anammox and denitrification. Some of these processes take place in deep water so that where there
852-659: A mediterranean sea ) or wholly (as inland seas ) enclosed by land . However, an exception to this is the Sargasso Sea which has no coastline and lies within a circular current, the North Atlantic Gyre . Seas are generally larger than lakes and contain salt water, but the Sea of Galilee is a freshwater lake . The United Nations Convention on the Law of the Sea states that all of the ocean
1065-657: A Cham Bani cleric – which was more successful and even briefly reestablished a Cham state for a short period of time, before being crushed by Minh Mang's forces. The unfortunate defeat of the people of Panduranga in their struggle against Vietnamese oppression also sealed their and remnant of Champa's fate. A large chunk of the Cham in Panduranga were subjected to forced assimilation by the Vietnamese, while many Cham, including indigenous highland peoples, were indiscriminately killed by
1278-495: A Cham king named Jaya Prakāśadharma who ascended the throne of Champa as Vikrantavarman I (r. 653–686). Prakāśadharma had thorough knowledge of Sanskrit learning, Sanskrit literature, and Indian cosmology. He authorized many constructions of religious sanctuaries at My Son and several building projects throughout the kingdom, laying down the foundations for the Champa art and architectural styles. He also sent many embassies regularly to
1491-399: A Vietnamese invasion in 982 led by king Le Hoan of Dai Viet , followed by Lưu Kế Tông (r. 986–989), a fanatical Vietnamese usurper who took the throne of Champa in 983, brought mass destruction to Northern Champa. Indrapura was still one of the major centers of Champa until being surpassed by Vijaya in the 12th century. The History of Song notes that to the east of Champa through
1704-422: A channel in the seabed. It may occur at a gap in a sandbar or near a man-made structure such as a groyne . These strong currents can have a velocity of 3 ft (0.9 m) per second, can form at different places at different stages of the tide and can carry away unwary bathers. Temporary upwelling currents occur when the wind pushes water away from the land and deeper water rises to replace it. This cold water
1917-542: A confederation of kingdom(s) and individual city-states for most of its history. For several periods from the 700s to 1471, there was the king of kings or the overlord based out of the most significant powerful cities like Indrapura and Vijaya , who wielded more power, influence, and sense of unity over the other Cham kings and princes, and perhaps those minor local kings and princes (Yuvarāja – not necessary mean crown prince) or regional military commander/warlords (senāpati) were from local associates that had no connection with
2130-610: A crucial stage of the making of Southeast Asia . The peoples of Champa maintained a system of lucrative trade networks across the region, connecting the Indian Ocean and Eastern Asia , until the 17th century. In Champa, historians also found the Đông Yên Châu inscription , the oldest known native Southeast Asian literature written in a native Southeast Asian language dating to around c. 350 CE, predating first Khmer , Mon , Malay texts by centuries. Scholarly consensus has shifted several times as to what degree Champa functioned as
2343-626: A decade or more. Several countries have made competing territorial claims over the South China Sea. Such disputes have been regarded as Asia's most potentially dangerous point of conflict. Both the People's Republic of China (PRC) and the Republic of China (ROC, commonly known as Taiwan) claim almost the entire body as their own, demarcating their claims within what is known as the " nine-dash line ", which claims overlap with virtually every other country in
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#17330855170522556-441: A dispute over the South China Sea, India's state-run explorer, Oil and Natural Gas Corporation (ONGC) said that its overseas investment arm ONGC Videsh Limited had signed a three-year deal with PetroVietnam for developing long-term cooperation in the oil sector and that it had accepted Vietnam's offer of exploration in certain specified blocks in the South China Sea. In response, Chinese Foreign Ministry spokesperson Jiang Yu issued
2769-639: A guerrilla resistance against the Yuan for two years, together with Dai Viet , eventually repelling the Mongols back to China by June 1285. After the Yuan wars ended decisively in 1288, Dai Viet king Trần Nhân Tông spent his retirement years in Northern Champa, and arranged a marriage between his daughter, Princess Huyền Trân , and Prince Harijit – now reigning as Jaya Simhavarman III (r. 1288–1307) - in 1306 in exchange for peace and territory. From 1307 to 1401, not even
2982-400: A height of less than three feet, so they often pass unnoticed at this stage. In contrast, ocean surface waves caused by winds have wavelengths of a few hundred feet, travel at up to 65 miles per hour (105 km/h) and are up to 45 feet (14 metres) high. As a tsunami moves into shallower water its speed decreases, its wavelength shortens and its amplitude increases enormously, behaving in
3195-507: A large and multidisciplinary field: it examines the properties of seawater ; studies waves , tides , and currents ; charts coastlines and maps the seabeds ; and studies marine life . The subfield dealing with the sea's motion, its forces, and the forces acting upon it is known as physical oceanography . Marine biology (biological oceanography) studies the plants , animals , and other organisms inhabiting marine ecosystems . Both are informed by chemical oceanography , which studies
3408-481: A linga called Bhadresvara, whose name was a combination of the king's own name and that of the Hindu god of gods Shiva . The worship of the original god-king under the name Bhadresvara and other names continued through the centuries that followed. Being famously known as skillful sailors and navigators, as early as the 5th century CE, the Cham might have reached India by themselves. King Gangaraja (r. 413–?) of Champa
3621-477: A long time by scholars until Po Dharma . Cham literature also have been greatly preserved in approximately more than 3,000 Cham manuscripts and printed books dating from the 16th to 20th centuries. The Southeast Asia Digital Library (SEADL) at Northern Illinois University currently contains an extensive collection of 977 digitized Cham manuscripts, totaling more than 57,800 pages of multigenre content. Modern scholarship has been guided by two competing theories in
3834-449: A low-pressure system, can raise the surface of the sea at high tide dramatically. The Earth is composed of a magnetic central core , a mostly liquid mantle and a hard rigid outer shell (or lithosphere ), which is composed of the Earth's rocky crust and the deeper mostly solid outer layer of the mantle. On land the crust is known as the continental crust while under the sea it is known as
4047-591: A mobile secretariat ( xingsheng ) in Champa for the purpose of dominating the South China Sea and the Indian Ocean trade networks. It demonstrated the strategic importance of Champa as a naval juggernaut of medieval maritime Eurasia. The Yuan campaign led by General Sogetu against the Cham began in February 1283 with their initial capture of Vijaya forcing the Cham king Indravarman V (r. 1258–1287) and Prince Harijit to wage
4260-519: A new Buddhist dynasty founded by Indravarman II (r. ? – 893) moved the capital or the major center of Champa to the north again. Indravarman II established the city of Indrapura , near My Son and ancient Simhapura . Mahayana Buddhism eclipsed Hinduism, becoming the state religion. Art historians often attribute the period between 875 and 982 as the Golden Age of Champa art and Champa culture (distinguish with modern Cham culture). Unfortunately,
4473-589: A new dynasty of Jaya Simhavarman VI (r. 1390–1400). His successor Indravarman VI (r. 1400–1441) reigned for the next 41 years, expanding Champa's territory to the Mekong Delta amidst the decline of the Angkorian Empire . One of Indravarman's nephews, Prince Śrīndra-Viṣṇukīrti Virabhadravarman , became king of Champa in 1441. By the mid 15th century, Champa might have been suffering a steady dooming decline. No inscription survived after 1456. The Vietnamese under
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#17330855170524686-534: A new world of creatures living on the seabed that scientists had not previously known to exist. Some like the detrivores rely on organic material falling to the ocean floor. Others cluster round deep sea hydrothermal vents where mineral-rich flows of water emerge from the seabed, supporting communities whose primary producers are sulphide-oxidising chemoautotrophic bacteria, and whose consumers include specialised bivalves, sea anemones, barnacles, crabs, worms and fish, often found nowhere else. A dead whale sinking to
4899-619: A position on the legal and procedural merits of the case or on the disputed claims, and the Secretary-General expressed his hope that the continued consultations on a Code of Conduct between ASEAN and China under the framework of the Declaration of the Conduct of Parties in the South China Sea will lead to increased mutual understanding among all the parties. Sea A sea is a large body of salt water . There are particular seas and
5112-508: A possible solution to tensions with the United States in the South China Sea would be to sink one or two United States Navy aircraft carriers to break US morale. Also in December 2018, Chinese commentator and Senior Colonel in the People's Liberation Army Air Force , Dai Xu suggested that China's navy should ram United States Navy ships sailing in the South China Sea. The US, although not
5325-449: A predecessor state in the region, began its existence in 192 CE. In the 4th century CE, wars with the neighbouring Kingdom of Funan in Cambodia and the acquisition of Funanese territory led to the infusion of Indian culture into Cham society. Sanskrit was adopted as a scholarly language, and Hinduism , especially Shaivism , became the state religion. Starting from the 10th century CE,
5538-483: A process that propagated to the southwest resulting in the V-shaped basin we see today. Extension ceased around 17 million years ago. Arguments have continued about the role of tectonic extrusion in forming the basin. Paul Tapponnier and colleagues have argued that as India collides with Asia it pushes Indochina to the southeast. The relative shear between Indochina and China caused the South China Sea to open. This view
5751-570: A protest. The spokesman of the Ministry of External Affairs of the Government of India responded by saying that "The Chinese had concerns but we are going by what the Vietnamese authorities have told us and have conveyed this to the Chinese." The Indo-Vietnamese deal was also denounced by the Chinese state-run newspaper Global Times . In 1999, Taiwan claimed the entirety of the South China Sea islands under
5964-446: A quasi-registral, incipiently tonal system . After the fall of Vijaya Champa in 1471, another group of Cham and Chamic might have moved west, forming Haroi , which has reversal Bahnaric linguistic influences. According to Cham folk legends, Champa was founded by Lady Po Nagar –the divine mother goddess of the kingdom. She came from the Moon, arrived in modern Central Vietnam and founded
6177-536: A saline body of water and therefore solely a sea in the sense of the common use of the word, like all other saltwater lakes called sea. Earth is the only known planet with seas of liquid water on its surface, although Mars possesses ice caps and similar planets in other solar systems may have oceans. Earth's 1,335,000,000 cubic kilometers (320,000,000 cu mi) of sea contain about 97.2 percent of its known water and covers approximately 71 percent of its surface. Another 2.15% of Earth's water
6390-616: A signatory to UNCLOS , has maintained its position that its naval vessels have consistently sailed unhindered through the South China Sea and will continue to do so. At times US warships have come within the 12 nautical-mile limit of Chinese-controlled islands (such as the Paracel Islands), arousing China's ire. During the US Chief of Naval Operations' visit to China in early 2019, he and his Chinese counterpart worked out rules of engagement, whenever American warships and Chinese warships met up on
6603-587: A single surviving indigenous source exists in Champa, and almost all of its 14th-century history has to rely on Chinese and Vietnamese sources. Engraving Sanskrit inscription, the prestige language of religious and political elites in Champa, stopped in 1253. No other grand temple or other construction project was built after 1300. These facts marked the beginning of Champa's decline. From 1367 to 1390, according to Chinese and Vietnamese sources, Che Bong Nga , who ruled as king of Champa from 1360 to 1390, had restored Champa. He launched six invasions of Dai Viet during
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6816-494: A small fraction, or about 40,000 Cham people in the old Panduranga remained in 1885 when the French completed their acquisition of Vietnam . The French colonial administration prohibited Kinh discrimination and prejudice against Cham and indigenous highland peoples, putting an end to Vietnamese cultural genocide of the Cham. But French colonialists also exploited the ethnic hatred in situ between Vietnamese and Cham to deal with remnant of
7029-412: A strong monarch, the territories of the kingdom stretch from present-day Quảng Bình to Khánh Hòa . An internal division called viṣaya (district) was first introduced. There were at least two viṣaya: Caum and Midit. Each of them has a handful number of local koṣṭhāgāras –known as 'source of stable income to upkeep the worship of three gods. During the twelfth and thirteenth centuries, northern Champa
7242-451: A subfamily of Malayo-Polynesian closely related to the Malayic and Bali–Sasak languages that is spoken throughout maritime Southeast Asia. Although Cham culture is usually intertwined with the broader culture of Champa, the kingdom had a multiethnic population, which consisted of Austronesian Chamic-speaking peoples that made up the majority of its demographics. The people who used to inhabit
7455-628: A two-day journey lay the country of Ma-i at Mindoro, Philippines; which Champa had trade relations with. Afterwards, during the 1000s, Rajah Kiling, the Hindu king of the Philippine Rajahnate of Butuan instigated a commercial rivalry with the Champa Civilization by requesting diplomatic equality in court protocol towards his Rajahnate, from the Chinese Empire , which was later denied by
7668-444: A unified entity. Originally being viewed as a unified kingdom throughout most of its history, later authors suggested that Champa was better considered to be a federation of independent states. A number of modern scholars have suggested that Champa did form a unified kingdom in some periods but was disunified in others. The Chams of modern Vietnam and Cambodia are the major remnants of this former kingdom. They speak Chamic languages,
7881-471: A very high range in bays or estuaries . Submarine earthquakes arising from tectonic plate movements under the oceans can lead to destructive tsunamis , as can volcanoes, huge landslides , or the impact of large meteorites . The seas have been an integral element for humans throughout history and culture. Humans harnessing and studying the seas have been recorded since ancient times and evidenced well into prehistory , while its modern scientific study
8094-414: A wide array of species including corals (only six of which contribute to reef formation). Marine primary producers – plants and microscopic organisms in the plankton – are widespread and very essential for the ecosystem. It has been estimated that half of the world's oxygen is produced by phytoplankton. About 45 percent of the sea's primary production of living material
8307-517: Is "sea". The law of the sea has at its center the definition of the boundaries of the ocean, clarifying its application in marginal seas . But what bodies of water other than the sea the law applies to is being crucially negotiated in the case of the Caspian Sea and its status as "sea", basically revolving around the issue of the Caspian Sea about either being factually an oceanic sea or only
8520-449: Is a continuous circulation of water in the oceans. Warm surface currents cool as they move away from the tropics, and the water becomes denser and sinks. The cold water moves back towards the equator as a deep sea current, driven by changes in the temperature and density of the water, before eventually welling up again towards the surface. Deep seawater has a temperature between −2 °C (28 °F) and 5 °C (41 °F) in all parts of
8733-399: Is a point of land jutting out into the sea and a larger promontory is known as a cape . The indentation of a coastline, especially between two headlands, is a bay , a small bay with a narrow inlet is a cove and a large bay may be referred to as a gulf . Coastlines are influenced by several factors including the strength of the waves arriving on the shore, the gradient of the land margin,
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8946-620: Is also worshiped by the Vietnamese, a tradition that dates back to the 11th century during the Ly dynasty period. The Chams descended from seafaring settlers who reached the Southeast Asian mainland from Borneo about the time of the Sa Huỳnh culture between 1000 BCE and 200 CE, the predecessor of the Cham kingdom. The Cham language is part of the Austronesian family. According to one study, Cham
9159-487: Is an upwelling of cold waters, and also near estuaries where land-sourced nutrients are present, plant growth is higher. This means that the most productive areas, rich in plankton and therefore also in fish, are mainly coastal. There is a broader spectrum of higher animal taxa in the sea than on land, many marine species have yet to be discovered and the number known to science is expanding annually. Some vertebrates such as seabirds , seals and sea turtles return to
9372-556: Is called oceanography and maritime space is governed by the law of the sea , with admiralty law regulating human interactions at sea. The seas provide substantial supplies of food for humans, mainly fish , but also shellfish , mammals and seaweed , whether caught by fishermen or farmed underwater. Other human uses of the seas include trade , travel, mineral extraction , power generation , warfare , and leisure activities such as swimming , sailing , and scuba diving . Many of these activities create marine pollution . The sea
9585-478: Is contributed by diatoms . Much larger algae, commonly known as seaweeds , are important locally; Sargassum forms floating drifts, while kelp form seabed forests. Flowering plants in the form of seagrasses grow in " meadows " in sandy shallows, mangroves line the coast in tropical and subtropical regions and salt-tolerant plants thrive in regularly inundated salt marshes . All of these habitats are able to sequester large quantities of carbon and support
9798-527: Is disputed by geologists who do not consider Indochina to have moved far relative to mainland Asia. Marine geophysical studies in the Gulf of Tonkin by Peter Clift has shown that the Red River Fault was active and causing basin formation at least by 37 million years ago in the northwest South China Sea, consistent with extrusion playing a part in the formation of the sea. Since opening, the South China Sea has been
10011-475: Is frozen, found in the sea ice covering the Arctic Ocean , the ice cap covering Antarctica and its adjacent seas , and various glaciers and surface deposits around the world. The remainder (about 0.65% of the whole) form underground reservoirs or various stages of the water cycle , containing the freshwater encountered and used by most terrestrial life : vapor in the air , the clouds it slowly forms,
10224-401: Is likely to reduce levels of oxygen in surface waters since the solubility of oxygen in water falls at higher temperatures. Ocean deoxygenation is projected to increase hypoxia by 10%, and triple suboxic waters (oxygen concentrations 98% less than the mean surface concentrations), for each 1 °C of upper-ocean warming. The amount of light that penetrates the sea depends on the angle of
10437-773: Is located south of Natuna Island within Indonesian territorial waters. Therefore, Indonesia has named two seas that are portions of South China Sea; the Natuna Sea located between Natuna Islands and the Lingga and Tambelan Archipelagos , and the North Natuna Sea located between the Natuna Islands and Cape Cà Mau on the southern tip of the Mekong Delta in Vietnam. There has been no agreement between China and Indonesia on what has been called
10650-517: Is near the Mariana Islands , a volcanic archipelago in the West Pacific. Its deepest point is 10.994 kilometres (nearly 7 miles) below the surface of the sea. The zone where land meets sea is known as the coast and the part between the lowest spring tides and the upper limit reached by splashing waves is the shore . A beach is the accumulation of sand or shingle on the shore. A headland
10863-487: Is often rich in nutrients and creates blooms of phytoplankton and a great increase in the productivity of the sea. Tides are the regular rise and fall in water level experienced by seas and oceans in response to the gravitational influences of the Moon and the Sun, and the effects of the Earth's rotation. During each tidal cycle, at any given place the water rises to a maximum height known as "high tide" before ebbing away again to
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#173308551705211076-675: Is related most closely to modern Acehnese in northern Sumatra. The Sa Huỳnh culture was an Austronesian seafaring culture that centered around present-day Central Vietnam coastal region. During its heyday, the culture distributed across the Central Vietnam coast and had commercial links across the South China Sea with the Philippine archipelago and even with Taiwan (through Maritime Jade Road , Sa Huynh-Kalanay Interaction Sphere ), which now most archaeologists and scholars have consentient determined and are no longer hesitant in linking with
11289-400: Is richest for Indrapura ; in the 12th century CE, it is richest for Vijaya ; following the 15th century CE, it is richest for Panduranga . Some scholars have taken these shifts in the historical record to reflect the movement of the Cham capital from one location to another. According to such scholars, if the 10th-century record is richest for Indrapura, it is so because at that time Indrapura
11502-580: Is the interconnected system of all the Earth's oceanic waters, including the Atlantic , Pacific , Indian , Southern and Arctic Oceans . However, the word "sea" can also be used for many specific, much smaller bodies of seawater, such as the North Sea or the Red Sea . There is no sharp distinction between seas and oceans , though generally seas are smaller, and are often partly (as marginal seas or particularly as
11715-419: Is turned into kinetic energy, creating a shallow wave, a tsunami, radiating outwards at a velocity proportional to the square root of the depth of the water and which therefore travels much faster in the open ocean than on a continental shelf. In the deep open sea, tsunamis have wavelengths of around 80 to 300 miles (130 to 480 km), travel at speeds of over 600 miles per hour (970 km/h) and usually have
11928-632: The Sakkarai dak rai patao , was a 5227-pages collection of Cham veritable records, documenting a history range from early legendary kings of 11th–13th century to the deposition of Po Thak The , the last king of Panduranga in 1832, reckoning in total 39 rulers of Panduranga, the tales of spread of Islam to Champa in 1000 CE, to Po Thak The . The annals were written in Akhar Thrah (traditional) Cham script with collection of Cham and Vietnamese seals imprinted by Vietnamese rulers. However, it had been dismissed for
12141-618: The Arab maritime routes in Mainland Southeast Asia as a supplier of aloe . Despite the frequent wars between the Cham and the Khmer , the two nations also traded and their cultural influences moved in the same directions. Since royal families of the two countries intermarried frequently. Champa also had close trade and cultural relations with the powerful maritime empire of Srivijaya and later with
12354-579: The Balinese Hindus of the Balinese people of Indonesia . The name Champa derived from the Sanskrit word campaka (pronounced /tʃampaka/ ), which refers to Magnolia champaca , a species of flowering tree known for its fragrant flowers. Rolf Stein proposed that Champa might have been inspired when Austronesian sailors originating from Central Vietnam arrived in present-day Eastern India around
12567-576: The Can Vuong movement in Binh Thuan. The King of Champa is the title ruler of Champa. Champa rulers often use two Hinduist style titles: raja-di-raja ( राजाधिराजः " raja of rajas" or king of kings : written here in Devanagari since the Cham used their own Cham script ) or pu po tana raya ("lord of all territories"). They would be addressed by style ganreh patrai (his Majesty). Officially,
12780-447: The Cham people always refer themselves as Čaṃ rather than Champa (pa–abbreviation of peśvara , Campādeśa , Campānagara ). Most indigenous Austronesian ethnic groups in Central Vietnam such as the Rade , Jarai , Chru , Roglai peoples call the Cham by similar lexemes which likely derived from Čaṃ. Vietnamese historical accounts also have the Cham named as Chiêm. Most importantly,
12993-460: The Cham–Vietnamese War (1471) , Champa suffered serious defeats at the hands of the Vietnamese, in which 120,000 people were either captured or killed. 50 members of the Cham royal family and some 20–30,000 were taken prisoners and deported, including the king of Champa Tra Toan , who died along his way to the north in captivity. Contemporary reports from China record a Cham envoy telling to
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#173308551705213206-628: The Coriolis effect . The surface currents flow in a clockwise direction in the Northern Hemisphere and anticlockwise in the Southern Hemisphere. The water moving away from the equator is warm, and that flowing in the reverse direction has lost most of its heat. These currents tend to moderate the Earth's climate, cooling the equatorial region and warming regions at higher latitudes. Global climate and weather forecasts are powerfully affected by
13419-608: The Czech Republic , Denmark , Finland , France , Germany , Greece , India , Ireland , Italy , Japan, the Netherlands , New Zealand , the Philippines, Poland , Portugal , Romania , Slovakia , South Korea , Spain , Sweden , the United Kingdom , and the United States; the governments in opposition are China, Montenegro , Pakistan , Russia, Sudan , Syria , Taiwan, and Vanuatu . The United Nations itself does not have
13632-850: The East China Sea via the Taiwan Strait , the Philippine Sea via the Luzon Strait , the Sulu Sea via the straits around Palawan , and the Java Sea via the Karimata and Bangka Straits . The Gulf of Thailand and the Gulf of Tonkin are part of the South China Sea. $ 3.4 trillion of the world's $ 16 trillion maritime shipping passed through South China Sea in 2016. Oil and natural gas reserves have been found in
13845-484: The Eastern Han dynasty of China in Xianglin who rebelled against Chinese rule in 192. Around the 4th century CE, Cham polities began to absorb much of Indic influences , probably through its neighbor, Funan . Hinduism was established as Champa began to create Sanskrit stone inscriptions and erect red brick Hindu temples . The first king acknowledged in the inscriptions is Bhadravarman , who reigned from 380 to 413 CE. At Mỹ Sơn , King Bhadravarman established
14058-498: The Kalayaan Island Group and Bajo de Masinloc , and tasked the National Mapping and Resource Information Authority to use the name in official maps. In July 2017, to assert its sovereignty, Indonesia renamed the northern reaches of its exclusive economic zone in the South China Sea as the North Natuna Sea , which is located north of the Indonesian Natuna Islands , bordering southern Vietnam exclusive economic zone , corresponding to southern end of South China Sea. The Natuna Sea
14271-405: The Khmer inscriptions , Chiêm Thành in Vietnamese , Campa in Malay , Zhànchéng ( Mandarin : 占城) in Chinese records, and al-Ṣanf ( Arabic : صَنْف) in Middle Eastern Muslim records. Early Champa evolved from the seafaring Austronesian Chamic Sa Huỳnh culture off the coast of modern-day Vietnam. Its emergence in the late 2nd century CE exemplifies early Southeast Asian statecraft at
14484-565: The Lee Teng-hui administration. The entire subsoil, seabed and waters of the Paracels and Spratlys are claimed by Taiwan. In 2012 and 2013, Vietnam and Taiwan butted heads against each other over anti-Vietnamese military exercises by Taiwan. In May 2014, China established an oil rig near the Paracel Islands, leading to multiple incidents between Vietnamese and Chinese ships. Vietnamese analysis identifies this change in strategy generating on going incidents as occurring since 2012. In December 2018, retired Chinese admiral Luo Yuan proposed that
14697-421: The Majapahit of the Malay Archipelago , its easternmost trade relations being with the kingdoms of Ma-i . Butuan , and Sulu in the Philippines. Evidence gathered from linguistic studies around Aceh confirms that a very strong Chamic cultural influence existed in Indonesia; this is indicated by the use of the Chamic language Acehnese as the main language in the coastal regions of Aceh. Linguists believe
14910-422: The Mediterranean and Red Sea with the Egyptian Hannu reaching the Arabian Peninsula and the African Coast around 2750 BC. In the first millennium BC, Phoenicians and Greeks established colonies throughout the Mediterranean and the Black Sea . Around 500 BC, the Carthaginian navigator Hanno left a detailed periplus of an Atlantic journey that reached at least Senegal and possibly Mount Cameroon . In
15123-446: The Spring and Autumn period (771–476 BCE) also referred to the sea, but by the name Nan Hai (Chinese: 南海 ; pinyin: Nán Hǎi ; lit. 'South Sea') in reference to the State of Chu's expeditions there. Nan Hai, the South Sea, was one of the Four Seas of Chinese literature. There are three other seas, one for each of the four cardinal directions. During the Eastern Han dynasty (23–220 CE), China's rulers called
15336-682: The Tang Empire and neighboring Khmer. The Chinese reckoned Champa during the 7th century as the chief tributary state of the South, on par with the Korean kingdoms of Koguryŏ in the Northeast and Baekje in the East — "though the latter was rivaled by Japan." Between the 7th to 10th centuries CE, the Cham polities rose to become a naval power; as Cham ports attracted local and foreign traders, Cham fleets also controlled
15549-767: The Vietnam War . Currently, the Project Corpus of the Inscriptions of Campā launched by French School of Asian Studies (EFEO) partnering with the Institute for Study of the Ancient World (ISAW) of New York University is tasked for cataloging, sustaining and preserving ancient Cham inscriptions into an online index library and publications of scholarship's epigraphical studies into English, French, and Vietnamese. The Cham have their written records in form of paper book, known as
15762-567: The early Mediaeval period , the Vikings crossed the North Atlantic and even reached the northeastern fringes of North America. Novgorodians had also been sailing the White Sea since the 13th century or before. Meanwhile, the seas along the eastern and southern Asian coast were used by Arab and Chinese traders. The Chinese Ming Dynasty had a fleet of 317 ships with 37,000 men under Zheng He in
15975-615: The hundred-year wave ) they are designed against. Rogue waves, however, have been documented at heights above 25 meters (82 ft). The top of a wave is known as the crest, the lowest point between waves is the trough and the distance between the crests is the wavelength. The wave is pushed across the surface of the sea by the wind, but this represents a transfer of energy and not a horizontal movement of water. As waves approach land and move into shallow water , they change their behaviour. If approaching at an angle, waves may bend ( refraction ) or wrap rocks and headlands ( diffraction ). When
16188-606: The matrilocal structure of Cham families. And compared to other Vietnamese ethnic groups, the Cham do not share ancestry with southern Han Chinese, along with Austronesian-speaking Mang. Champa was known to the Chinese as 林邑 Linyi in Mandarin, Lam Yap in Cantonese and to the Vietnamese, Lâm Ấp (which is the Sino-Vietnamese pronunciation of 林邑). The state of Champa was founded in 192 CE by Khu Liên (Ou Lian), an official of
16401-422: The oceanic crust . The latter is composed of relatively dense basalt and is some five to ten kilometres (three to six miles) thick. The relatively thin lithosphere floats on the weaker and hotter mantle below and is fractured into a number of tectonic plates . In mid-ocean, magma is constantly being thrust through the seabed between adjoining plates to form mid-oceanic ridges and here convection currents within
16614-436: The photosynthetic activity of these plants produces oxygen, which dissolves in the seawater and is used by marine animals. At night, photosynthesis stops, and the amount of dissolved oxygen declines. In the deep sea, where insufficient light penetrates for plants to grow, there is very little dissolved oxygen. In its absence, organic material is broken down by anaerobic bacteria producing hydrogen sulphide . Climate change
16827-421: The rain falling from them, and the lakes and rivers spontaneously formed as its waters flow again and again to the sea. The scientific study of water and Earth's water cycle is hydrology ; hydrodynamics studies the physics of water in motion. The more recent study of the sea in particular is oceanography . This began as the study of the shape of the ocean's currents but has since expanded into
17040-412: The swash moves beach material seawards. Under their influence, the sand and shingle on the beach is ground together and abraded. Around high tide, the power of a storm wave impacting on the foot of a cliff has a shattering effect as air in cracks and crevices is compressed and then expands rapidly with release of pressure. At the same time, sand and pebbles have an erosive effect as they are thrown against
17253-420: The water , carbon , and nitrogen cycles . The surface of water interacts with the atmosphere, exchanging properties such as particles and temperature, as well as currents . Surface currents are the water currents that are produced by the atmosphere's currents and its winds blowing over the surface of the water, producing wind waves , setting up through drag slow but stable circulations of water, as in
17466-454: The 4th century CE, shaped the art and culture of the Cham Kingdom for centuries, as testified by the many Cham Hindu statues and red brick temples that dotted the landscape in Cham lands. Mỹ Sơn , a former religious center, and Hội An , one of Champa's main port cities, are now World Heritage Sites . Today, many Cham people adhere to Islam , a conversion which began in the 10th century, with
17679-980: The Acehnese language, a descendant of the Proto-Chamic language, separated from the Chamic tongue sometime in the 1st millennium BCE. However, scholarly views on the precise nature of Aceh-Chamic relations vary. Tsat , a northern Chamic language spoken by the Utsul on the Hainan Island, is speculated to be separated from Cham at the time when contact between Champa and Islam had grown considerably, but precise details remain inadequate. Under Chinese language influence over Hainan, Tsat has become fully monosyllabic, while some certain shifts to monosyllabicity can be observed in Eastern Cham (in contact with Vietnamese). Eastern Cham has developed
17892-547: The Arab maritime trade introduces Islamic cultural and religious influences to the region. Although Hinduism was the predominant religion among the Cham people until the 16th century, Islam began to attract large numbers of Chams, when some members of the Cham royalty converted to Islam in the 17th century. Champa came to serve as an important link in the spice trade , which stretched from the Persian Gulf to South China , and later in
18105-554: The Austronesian " Lapita " peoples displayed great feats of navigation, reaching out from the Bismarck Archipelago to as far away as Fiji , Tonga , and Samoa . Their descendants continued to travel thousands of miles between tiny islands on outrigger canoes , and in the process they found many new islands, including Hawaii , Easter Island (Rapa Nui), and New Zealand. The Ancient Egyptians and Phoenicians explored
18318-588: The Bangka Belitung Islands to the Natuna Islands . The sea lies above a drowned continental shelf ; during recent ice ages global sea level was hundreds of metres lower, and Borneo was part of the Asian mainland. The South China Sea opened around 45 million years ago when the " Dangerous Ground " rifted away from southern China. Extension culminated in seafloor spreading around 30 million years ago,
18531-407: The Cham of Panduranga a Tân Dân (new people), denoting the imposed mundanity that nothing to ever differentiate them with other Vietnamese. Minh Mang's son and successor Thiệu Trị , however, reverted most of his father's strict policies against Catholic Christians and ethnic minorities. Under Thiệu Trị and Tu Duc , the Cham were reallowed to practice their religions with little prohibition. Only
18744-409: The Cham subjects. Cham culture and Cham identity were rapidly, systematically destroyed. Vietnamese settlers seized most of Cham farmlands and commodity productions, pushing the Cham to far-inland arid highlands, and the Cham were subjected to heavy taxations and mandated conscriptions. Two widespread Cham revolts against Minh Mang's oppression arose in 1833–1835, the latter led by khatib Ja Thak Wa -
18957-488: The Champa Alliance. Started from the 17th century, Champa kings used title Paduka Seri Sultan in some occasions, a borrowed honorific from Muslim Malay rulers. The 13th-century Chinese gazetteer account Zhu Fan Zhi (c. 1225) describes the Cham king 'wears a headdress of gold and adorns his body with strings of jewels' and either rides on an elephant or is lifted on a 'cloth hammock by four men' when he goes outside
19170-458: The Champa rulers originated from the Hindu tradition, often consisting of titles and aliases. Titles (prefix) like: Jaya ( जय "victory"), Maha ( महा "great"), Sri ( श्री "glory"). Aliases (stem) like: Bhadravarman, Vikrantavarman, Rudravarman, Simhavarman, Indravarman, Paramesvaravarman, Harivarman... Among them, the suffix -varman belongs to the Kshatriya class and is only for those leaders of
19383-530: The Chinese Imperial court, mainly because of favoritism for the Champa civilization. However, the future Rajah of Butuan, Sri Bata Shaja later succeeded in attaining diplomatic equality with Champa by sending the flamboyant ambassador Likanhsieh. Likanhsieh shocked the Emperor Zhenzong by presenting a memorial engraved on a golden tablet, some white dragon ( Bailong 白龍) camphor , Moluccan cloves, and
19596-403: The Chinese court: "Annam destroyed our country" with additional notes of massive burning and looting, in which 40 to 60,000 people were slaughtered. The kingdom was reduced to a small enclave near Nha Trang and Phan Rang with many Chams fleeing to Cambodia . Champa was reduced to the principalities of Panduranga and Kauthara at the beginning of the 16th century. Kauthara was annexed by
19809-405: The Earth , clarified the process of sedimentation , and assisted the study of volcanism and earthquakes . A characteristic of seawater is that it is salty. Salinity is usually measured in parts per thousand ( ‰ or per mil), and the open ocean has about 35 grams (1.2 oz) solids per litre, a salinity of 35 ‰. The Mediterranean Sea is slightly higher at 38 ‰, while the salinity of
20022-420: The Earth is closest to the Moon because it is also where the effect of the Moon's gravity is stronger. On the opposite side of the Earth, the lunar force is at its weakest and this causes another bulge to form. As the Moon rotates around the Earth, so do these ocean bulges move around the Earth. The gravitational attraction of the Sun is also working on the seas, but its effect on tides is less powerful than that of
20235-411: The Earth to make a complete revolution and return the Moon to its previous position relative to an observer. The Moon's mass is some 27 million times smaller than the Sun, but it is 400 times closer to the Earth. Tidal force or tide-raising force decreases rapidly with distance, so the moon has more than twice as great an effect on tides as the Sun. A bulge is formed in the ocean at the place where
20448-709: The East coast of Sumatra to Lucipara Point ( 3°14′S 106°05′E / 3.233°S 106.083°E / -3.233; 106.083 ) thence to Tanjong Nanka, the Southwest extremity of Banka Island (where it transitions as Java Sea ), through this island to Tanjong Berikat the Eastern point ( 2°34′S 106°51′E / 2.567°S 106.850°E / -2.567; 106.850 ), on to Tanjong Djemang ( 2°36′S 107°37′E / 2.600°S 107.617°E / -2.600; 107.617 ) in Billiton , along
20661-516: The Khmer king, leading to a Cham occupation of Cambodia for the next four years. Jayavarman VII of Angkor launched several counterattack campaigns in the 1190s (1190, 1192, 1194–1195, 1198–1203), conquering Champa and making it a dependency of the Khmer Empire for 30 years. Champa was subjected to a Mongol Yuan invasion in 1283–1285. Before the invasion, Kublai Khan ordered the establishment of
20874-678: The Malay Peninsula, Sumatra and Java). In 767, the Tonkin coast was raided by a Javanese fleet (Daba) and Kunlun pirates, Champa was subsequently assaulted by Javanese or Kunlun vessels in 774 and 787. In 774 an assault was launched on Po-Nagar in Nha Trang where the pirates demolished temples, while in 787 an assault was launched on Virapura, near Phan Rang . The Javanese invaders continued to occupy southern Champa coastline until being driven off by Indravarman I (r. 787–801) in 799. In 875,
21087-533: The Middle Rocks to Malaysia. In July 2010, US Secretary of State Hillary Clinton called for China to resolve the territorial dispute. China responded by demanding the US keep out of the issue. This came at a time when both countries had been engaging in naval exercises in a show of force to the opposing side, which increased tensions in the region. The US Department of Defense released a statement on August 18 where it opposed
21300-413: The Moon, and when the Sun, Moon and Earth are all aligned (full moon and new moon), the combined effect results in the high "spring tides". In contrast, when the Sun is at 90° from the Moon as viewed from Earth, the combined gravitational effect on tides is less causing the lower "neap tides". A storm surge can occur when high winds pile water up against the coast in a shallow area and this, coupled with
21513-776: The Natuna waters dispute, with China being ambiguous as to the southern limit of its area of interest. States and territories with borders on the sea (clockwise from north) include: the People's Republic of China , the Republic of China (Taiwan) , the Philippines , Malaysia , Brunei , Indonesia and Vietnam . Major rivers that flow into South China Sea include the Pearl , Min , Jiulong , Red , Mekong , Menam , Rajang , Baram , Kapuas , Batang Hari , Musi , Kampar , Indragiri , Pahang , Agno , Pampanga and Pasig Rivers. The IHO in its Limits of Oceans and Seas , 3rd edition (1953), defines
21726-521: The North coast of this island to Tanjong Boeroeng Mandi ( 2°46′S 108°16′E / 2.767°S 108.267°E / -2.767; 108.267 ) and thence a line to Tanjong Sambar ( 3°00′S 110°19′E / 3.000°S 110.317°E / -3.000; 110.317 ) the Southwest extreme of Borneo . On the East. From Tanjong Sambar through the West coast of Borneo to Tanjong Sampanmangio,
21939-613: The North point, thence a line to West points of Balabac and Secam Reefs, on to the West point of Bancalan Island and to Cape Buliluyan, the Southwest point of Palawan , through this island to Cabuli Point, the Northern point thereof, thence to the Northwest point of Busuanga and to Cape Calavite in the island of Mindoro, to the Northwest point of Lubang Island and to Point Fuego (14°08'N) in Luzon Island , through this island to Cape Engano ,
22152-502: The Northeast point of Luzon, along a line joining this cape with the East point of Balintang Island (20°N) and to the East point of Y'Ami Island (21°05'N) thence to Garan Bi, the Southern point of Taiwan (Formosa), through this island to Santyo (25°N) its North Eastern Point. On the North. From Fuki Kaku the North point of Formosa to Kiushan Tao (Turnabout Island) on to the South point of Haitan Tao (25°25'N) and thence Westward on
22365-638: The Orang Dampuan. Harmonious commerce between Sulu and the Orang Dampuan was later restored. The Yakans were descendants of the Taguima-based Orang Dampuan who came to Sulu from Champa. The twelfth century in Champa is defined by constant social upheavals and warfare, Khmer invasions were frequent. The Khmer Empire conquered Northern Champa in 1145, but were quickly repulsed by king Jaya Harivarman I (r. 1148–1167). Another Angkorian invasion of Champa led by Suryavarman II in summer 1150 also
22578-523: The Palawan Trench. Now completely submerged, with a depth of 20 metres (66 ft), it was an island until it was covered about 7,000 years ago by increasing sea levels after the last ice age . With an area of 8,866 square kilometres (3,423 sq mi), it is one of the largest submerged atoll structures in the world. The South China Sea has historically been an important trade route between northeast Asia, China, southeast Asia, and going to India and
22791-558: The Parties" but concluded that China had not historically exercised exclusive control within the nine-dash line, hence has "no legal basis" to claim "historic rights" over the resources. It also concluded that China's historic rights claims over the maritime areas (as opposed to land masses and territorial waters) inside the nine-dash line would have no lawful effect outside of what's entitled to under UNCLOS. It criticized China's land reclamation projects and its construction of artificial islands in
23004-549: The Southern Hemisphere in the Roaring Forties , long, organised masses of water called swell roll across the ocean. If the wind dies down, the wave formation is reduced, but already-formed waves continue to travel in their original direction until they meet land. The size of the waves depends on the fetch , the distance that the wind has blown over the water and the strength and duration of that wind. When waves meet others coming from different directions, interference between
23217-541: The Spanish Magellan-Elcano expedition which would be the first to sail around the world. Champa Champa ( Cham : ꨌꩌꨛꨩ, چامفا; Khmer : ចាម្ប៉ា ; Vietnamese : Chiêm Thành 占城 or Chiêm Bá 占婆) was a collection of independent Cham polities that extended across the coast of what is present-day central and southern Vietnam from approximately the 2nd century CE until 1832. According to earliest historical references found in ancient sources,
23430-501: The Spratly Islands, saying that it had caused "severe harm to the coral reef environment". Finally, it characterized Taiping Island and other features of the Spratly Islands as "rocks" under UNCLOS, and therefore are not entitled to a 200 nautical mile exclusive economic zone . The arbitral tribunal decision was ruled as final and non-appealable by either country. China rejected the ruling, calling it "ill-founded". China's response
23643-403: The Vietnamese in 1471, Kauthara and Pāṇḍuraṅga persisted existing untouched. Kauthara fell to the Vietnamese 200 years later in 1653, while Panduranga was annexed in 1832. Pāṇḍuraṅga had its full list of kings ruled from the 13th century until 1832, which both Vietnamese and European sources had verified. So Pāṇḍuraṅga remained autonomous and could conduct its foreign affairs without permission from
23856-479: The Vietnamese in 1653. From 1799 to 1832, Panduranga lost its hereditary monarchy status, with kings selected and appointed by the Vietnamese court in Huế . The last remaining principality of Champa, Panduranga, survived until August 1832, when Minh Mang of Vietnam began his purge against rival Le Van Duyet 's faction, and accused the Cham leaders of supporting Duyet. Minh Mang ordered the last Cham king Po Phaok The and
24069-493: The Vietnamese in massacres, particularly from 1832 to 1836, during the Sumat and Ja Thak Wa uprisings. Bani mosques were razed to the ground. Temples were set on fire. Cham villages and their aquatic livelihoods were annihilated. By that time, the Cham totally lost their ancestors' seafaring and shipbuilding traditions. After finalizing these heavy-handed pacifications of Cham rebels and assimilation policies, emperor Minh Mang declared
24282-591: The Western Central Pacific (excluding the northernmost reaches of the South China Sea closest to the PRC coast) accounted for 14% of the total world catch from commercial fishing of 11.7 million tonnes. This was up from less than 4 million tonnes in 1970. China announced in May 2017 a breakthrough for mining methane clathrates , when they extracted methane from hydrates in the South China Sea, but commercial adoption may take
24495-517: The added CO 2 is absorbed by the oceans, forming carbonic acid and lowering the pH (now below 8.1 ) through a process called ocean acidification . The extent of further ocean chemistry changes, including ocean pH, will depend on climate change mitigation efforts taken by nations and their governments. The amount of oxygen found in seawater depends primarily on the plants growing in it. These are mainly algae, including phytoplankton , with some vascular plants such as seagrasses . In daylight,
24708-499: The ancestors of the Austronesian Cham and Chamic -speaking peoples. While Northern Vietnam Kinh people assimilated Han Chinese immigrants into their population, have a sinicized culture, Cham people carry the patrilineal R-M17 haplogroup of South Asian Indian origin from South Asian merchants spreading Hinduism to Champa and marrying Cham females since Chams have no matrilineal South Asian mtDNA , and this fits with
24921-590: The area of Champapuri , an ancient sacred city in Buddhism , for trade, then adopted the name for their people back in their homeland. While Louis Finot argued that the name Champa was brought by Indians to Central Vietnam. Recent academics however dispute the Indic origin explanation, which was conceived by Louis Finot , a colonial-era board director of the École française d'Extrême-Orient . In his 2005 Champa revised, Michael Vickery challenges Finot's idea. He argues that
25134-415: The area. The Western Central Pacific accounted for 14% of world's commercial fishing in 2010. The South China Sea Islands , collectively comprising several archipelago clusters of mostly small uninhabited islands, islets ( cays and shoals ), reefs / atolls and seamounts numbering in the hundreds, are subject to competing claims of sovereignty by several countries. These claims are also reflected in
25347-412: The behaviour of elements and molecules within the oceans: particularly, at the moment, the ocean's role in the carbon cycle and carbon dioxide 's role in the increasing acidification of seawater. Marine and maritime geography charts the shape and shaping of the sea, while marine geology (geological oceanography) has provided evidence of continental drift and the composition and structure of
25560-529: The bottom of the ocean provides food for an assembly of organisms which similarly rely largely on the actions of sulphur-reducing bacteria. Such places support unique biomes where many new microbes and other lifeforms have been discovered. Humans have navigated the seas since they first built sea-going craft. Mesopotamians were using bitumen to caulk their reed boats and, a little later, masted sails . By c. 3000 BC, Austronesians on Taiwan had begun spreading into maritime Southeast Asia . Subsequently,
25773-460: The boundaries between the land and sea, the slightly denser oceanic plates slide beneath the continental plates and more subduction trenches are formed. As they grate together, the continental plates are deformed and buckle causing mountain building and seismic activity. The Earth's deepest trench is the Mariana Trench which extends for about 2,500 kilometres (1,600 miles) across the seabed. It
25986-509: The case of the ocean sustaining deep-sea ocean currents . Deep-sea currents, known together as the global conveyor belt , carry cold water from near the poles to every ocean and significantly influence Earth's climate. Tides , the generally twice-daily rise and fall of sea levels , are caused by Earth's rotation and the gravitational effects of the Moon and, to a lesser extent, of the Sun . Tides may have
26199-437: The coast scour out channels and transport sand and pebbles away from their place of origin. Sediment carried to the sea by rivers settles on the seabed causing deltas to form in estuaries. All these materials move back and forth under the influence of waves, tides and currents. Dredging removes material and deepens channels but may have unexpected effects elsewhere on the coastline. Governments make efforts to prevent flooding of
26412-446: The composition and hardness of the coastal rock, the inclination of the off-shore slope and the changes of the level of the land due to local uplift or submergence. Normally, waves roll towards the shore at the rate of six to eight per minute and these are known as constructive waves as they tend to move material up the beach and have little erosive effect. Storm waves arrive on shore in rapid succession and are known as destructive waves as
26625-598: The continental shelf. Alternatively, marine habitats can be divided vertically into pelagic (open water), demersal (just above the seabed) and benthic (sea bottom) habitats. A third division is by latitude : from polar seas with ice shelves, sea ice and icebergs, to temperate and tropical waters. Coral reefs, the so-called "rainforests of the sea", occupy less than 0.1 percent of the world's ocean surface, yet their ecosystems include 25 percent of all marine species. The best-known are tropical coral reefs such as Australia's Great Barrier Reef , but cold water reefs harbour
26838-522: The currents. Most of the smallest organisms are the larvae of fish and marine invertebrates which liberate eggs in vast numbers because the chance of any one embryo surviving to maturity is so minute. The zooplankton feed on phytoplankton and on each other and form a basic part of the complex food chain that extends through variously sized fish and other nektonic organisms to large squid , sharks , porpoises , dolphins and whales . Some marine creatures make large migrations, either to other regions of
27051-463: The deadly Champa–Đại Việt War (1367–1390) , sacking its capital in 1371, 1377, 1378, and 1383, nearly bringing the Dai Viet to its collapse. Che Bong Nga was only stopped in 1390 on a naval battle in which the Vietnamese deployed firearms for the first time, and miraculously killed the king of Champa, ending the devastating war. After Che Bong Nga , Champa seemingly rebounced to its status quo under
27264-436: The depths of the ocean; however, the relative proportions of dissolved salts vary little across the oceans. The most abundant solid dissolved in seawater is sodium chloride . The water also contains salts of magnesium , calcium , potassium , and mercury , amongst many other elements, some in minute concentrations. A wide variety of organisms , including bacteria , protists , algae , plants, fungi , and animals live in
27477-410: The destruction may be caused by the flood water draining back into the sea after the tsunami has struck, dragging debris and people with it. Often several tsunami are caused by a single geological event and arrive at intervals of between eight minutes and two hours. The first wave to arrive on shore may not be the biggest or most destructive. Wind blowing over the surface of the sea causes friction at
27690-413: The direction of the wind. The friction between air and water caused by a gentle breeze on a pond causes ripples to form. A strong blow over the ocean causes larger waves as the moving air pushes against the raised ridges of water. The waves reach their maximum height when the rate at which they are travelling nearly matches the speed of the wind. In open water, when the wind blows continuously as happens in
27903-424: The dominant ruling dynasty or could be a member of that royal lineage within the perimeter of the mandala. Mandala is the term coined by O. W. Wolters describing the distribution of state power among small states within large kingdoms in premodern Southeast Asia. Two notable examples of this multi-centric nature of Champa were the principalities of Kauthara and Pāṇḍuraṅga . When Northern Champa and Vijaya fell to
28116-410: The early East Asia–South Asian subcontinent maritime route, could have visited and made communications with local Chamic communities along the coast of Central Vietnam. They played some roles in disseminating Indian culture and Buddhism. But that was not sustained and decisive as active "Indianized native societies," he argues, or Southeast Asian kingdoms that had already been "Indianized" like Funan, were
28329-412: The early Southeast Asian peoples, Hinduism was somewhat similar to their original beliefs. This resulted in peaceful conversions to Hinduism and Buddhism in Champa with little resistance. Rudravarman I of Champa (r. 529–572), a descendant of Gangaraja through maternal line, became king of Champa in 529 CE. During his reign, the temple complex of Bhadresvara was destroyed by a great fire in 535/536. He
28542-559: The early fifteenth century, sailing the Indian and Pacific Oceans. In the late fifteenth century, Western European mariners started making longer voyages of exploration in search of trade. Bartolomeu Dias rounded the Cape of Good Hope in 1487 and Vasco da Gama reached India via the Cape in 1498. Christopher Columbus sailed from Cadiz in 1492, attempting to reach the eastern lands of India and Japan by
28755-467: The east of the Philippines will continue to be called the Philippine Sea . In September 2012, Philippine President Benigno Aquino III signed Administrative Order No. 29, mandating that all government agencies use the name West Philippine Sea to refer to the parts of South China Sea within the Philippines exclusive economic zone , including the Luzon Sea as well as the waters around, within and adjacent to
28968-553: The first Cham polities were established around the 2nd to 3rd centuries CE, in the wake of Khu Liên 's rebellion against the rule of China's Eastern Han dynasty , and lasted until when the final remaining principality of Champa was annexed by Emperor Minh Mạng of the Vietnamese Nguyễn dynasty as part of the expansionist Nam tiến policy. The kingdom was known variously as Nagaracampa ( Sanskrit : नगरचम्प ), Champa (ꨌꩌꨛꨩ) in modern Cham , and Châmpa ( ចាម្ប៉ា ) in
29181-422: The food chain or precipitated into the deeper, more carbon-rich layers as dead soft tissue or in shells and bones as calcium carbonate . It circulates in this layer for long periods of time before either being deposited as sediment or being returned to surface waters through thermohaline circulation. The oceans are home to a diverse collection of life forms that use it as a habitat. Since sunlight illuminates only
29394-509: The gap and a circular movement of surface currents known as a gyre is formed. There are five main gyres in the world's oceans: two in the Pacific, two in the Atlantic and one in the Indian Ocean. Other smaller gyres are found in lesser seas and a single gyre flows around Antarctica . These gyres have followed the same routes for millennia, guided by the topography of the land, the wind direction and
29607-570: The globe. Seawater with a typical salinity of 35 ‰ has a freezing point of about −1.8 °C (28.8 °F). When its temperature becomes low enough, ice crystals form on the surface. These break into small pieces and coalesce into flat discs that form a thick suspension known as frazil . In calm conditions, this freezes into a thin flat sheet known as nilas , which thickens as new ice forms on its underside. In more turbulent seas, frazil crystals join into flat discs known as pancakes. These slide under each other and coalesce to form floes . In
29820-589: The high seas. On 26 June 2020, the 36th Association of Southeast Asian Nations (ASEAN) Summit was held virtually. Vietnam, as the Chairman of the Summit, released the Chairman's Statement. The statement said the United Nations Convention on the Law of the Sea is "the basis for determining maritime entitlements, sovereign rights, jurisdiction and legitimate interests over maritime zones, and the 1982 UNCLOS sets out
30033-409: The historiography of Champa. Scholars agree that historically Champa was divided into several regions or principalities spread out from south to north along the coast of modern Vietnam and united by a common language, culture, and heritage. It is acknowledged that the historical record is not equally rich for each of the regions in every historical period. For example, in the 10th century CE, the record
30246-430: The illusion of a unified Champa. Recent revisionist historians in the 1980s, for example Po Dharma and Trần Quốc Vượng , refuted the concept of single Champa. Chinese historical texts, Cham inscriptions, and especially the Cham annals, the Sakkarai dak rai patao , both confirm the existence of multi-Campa scenarios. Po Dharma argues that Champa was not a single kingdom or centralized in the manner of Đại Việt but likely
30459-442: The interface between air and sea. Not only does this cause waves to form, but it also makes the surface seawater move in the same direction as the wind. Although winds are variable, in any one place they predominantly blow from a single direction and thus a surface current can be formed. Westerly winds are most frequent in the mid-latitudes while easterlies dominate the tropics. When water moves in this way, other water flows in to fill
30672-458: The key factors of the process. On the other hand, Paul Mus suggests the reason for the peaceful acceptance of Hinduism by the Cham elite was likely related to the tropical monsoon climate background shared by areas like the Bay of Bengal , coastal mainland Southeast Asia all the way from Myanmar to Vietnam. Monsoon societies tended to practice animism , most importantly, the creed of earth spirit. To
30885-426: The king was the patron of art and construction. Majestic temples and shrines were built dedicated to the honor of the king of kings, his ancestors, and their beloved gods (usually Śiva). Some charismatic Cham kings declared themselves Protector of Champa in celebrating royal ceremony and coronation ( abhiseka ) which involves supernatural and spiritual rituals to demonstrate the king's authority. The regnal name of
31098-457: The kingdom, but a typhoon drifted her away and left her stranded on the coast of China, where she married a Chinese prince, and returned to Champa. The Po Nagar temple built in Nha Trang during the 8th century, and rebuilt in the 11th century was dedicated to her. Her portrayal image in the temple is said to date from 965 CE, it is of a commanding personage seated cross-legged upon a throne. She
31311-477: The land by the building of breakwaters , seawalls , dykes and levees and other sea defences. For instance, the Thames Barrier is designed to protect London from a storm surge, while the failure of the dykes and levees around New Orleans during Hurricane Katrina created a humanitarian crisis in the United States. The sea plays a part in the water or hydrological cycle , in which water evaporates from
31524-523: The land to breed but fish, cetaceans and sea snakes have a completely aquatic lifestyle and many invertebrate phyla are entirely marine. In fact, the oceans teem with life and provide many varying microhabitats. One of these is the surface film which, even though tossed about by the movement of waves, provides a rich environment and is home to bacteria, fungi , microalgae , protozoa , fish eggs and various larvae. The pelagic zone contains macro- and microfauna and myriad zooplankton which drift with
31737-400: The largest being Taiping Island (Itu Aba) at just over 1.3 kilometres (0.81 mi) long and with its highest elevation at 3.8 metres (12 ft). The largest singular feature in the area of the Spratly Islands is a 100 kilometres (62 mi) wide seamount called Reed Tablemount , also known as Reed Bank, in the northeast of the group, separated from Palawan Island of the Philippines by
31950-565: The legal framework within which all activities in the oceans and seas must be carried out." In January 2013, the Philippines initiated arbitration proceedings against China (PRC) over issues surrounding the nine-dash line , characterization of maritime features, and EEZ. China did not participate in the arbitration. On 12 July 2016, an arbitral tribunal ruled in favor of the Philippines on most of its submissions. It clarified that it would not "rule on any question of sovereignty over land territory and would not delimit any maritime boundary between
32163-648: The levels of salinity in different seas, the relative composition of the dissolved salts is stable throughout the world's oceans. Seawater is too saline for humans to drink safely, as the kidneys cannot excrete urine as salty as seawater. Although the amount of salt in the ocean remains relatively constant within the scale of millions of years, various factors affect the salinity of a body of water. Evaporation and by-product of ice formation (known as "brine rejection") increase salinity, whereas precipitation , sea ice melt, and runoff from land reduce it. The Baltic Sea , for example, has many rivers flowing into it, and thus
32376-759: The limits of South China Sea as follows: On the South. The Eastern and Southern limits of Singapore and Malacca Straits [A line joining Tanjong Datok, the Southeast point of Johore ( 1°22′N 104°17′E / 1.367°N 104.283°E / 1.367; 104.283 ) through Horsburgh Reef to Pulo Koko, the Northeastern extreme of Bintan Island ( 1°13.5′N 104°35′E / 1.2250°N 104.583°E / 1.2250; 104.583 ). The Northeastern coast of Sumatra ] as far West as Tanjong Kedabu ( 1°06′N 102°58′E / 1.100°N 102.967°E / 1.100; 102.967 ) down
32589-508: The mantle tend to drive the two plates apart. Parallel to these ridges and nearer the coasts, one oceanic plate may slide beneath another oceanic plate in a process known as subduction . Deep trenches are formed here and the process is accompanied by friction as the plates grind together. The movement proceeds in jerks which cause earthquakes, heat is produced and magma is forced up creating underwater mountains, some of which may form chains of volcanic islands near to deep trenches. Near some of
32802-416: The minimum "low tide" level. As the water recedes, it uncovers more and more of the foreshore , also known as the intertidal zone. The difference in height between the high tide and low tide is known as the tidal range or tidal amplitude. Most places experience two high tides each day, occurring at intervals of about 12 hours and 25 minutes. This is half the 24 hours and 50 minute period that it takes for
33015-469: The much larger China and that because many countries claim the same territory only multilateral talks could effectively resolve the competing claims. The overlapping claims over Pedra Branca or Pulau Batu Putih including the neighbouring Middle Rocks by both Singapore and Malaysia were settled in 2008 by the International Court of Justice , awarding Pedra Branca/Pulau Batu Puteh to Singapore and
33228-534: The northern Red Sea can reach 41‰. In contrast, some landlocked hypersaline lakes have a much higher salinity, for example, the Dead Sea has 300 grams (11 oz) dissolved solids per litre (300 ‰). While the constituents of table salt ( sodium and chloride ) make up about 85 percent of the solids in solution, there are also other metal ions such as magnesium and calcium , and negative ions including sulphate , carbonate , and bromide . Despite variations in
33441-699: The novel means of travelling westwards. He made landfall instead on an island in the Caribbean Sea and a few years later, the Venetian navigator John Cabot reached Newfoundland . The Italian Amerigo Vespucci , after whom America was named, explored the South American coastline in voyages made between 1497 and 1502, discovering the mouth of the Amazon River . In 1519 the Portuguese navigator Ferdinand Magellan led
33654-484: The ocean depths caused by the movement of deep water masses. A main deep ocean current flows through all the world's oceans and is known as the thermohaline circulation or global conveyor belt. This movement is slow and is driven by differences in density of the water caused by variations in salinity and temperature. At high latitudes the water is chilled by the low atmospheric temperature and becomes saltier as sea ice crystallizes out. Both these factors make it denser, and
33867-440: The ocean on a seasonal basis or vertical migrations daily, often ascending to feed at night and descending to safety by day. Ships can introduce or spread invasive species through the discharge of ballast water or the transport of organisms that have accumulated as part of the fouling community on the hulls of vessels. The demersal zone supports many animals that feed on benthic organisms or seek protection from predators and
34080-464: The ocean, travels through the atmosphere as vapour, condenses , falls as rain or snow , thereby sustaining life on land, and largely returns to the sea. Even in the Atacama Desert , where little rain ever falls, dense clouds of fog known as the camanchaca blow in from the sea and support plant life. In central Asia and other large land masses, there are endorheic basins which have no outlet to
34293-436: The official designation of Champa in Chinese historical texts was Zhànchéng –meaning "the city of the Cham," "why not city of the Champa?," Vickery doubts. The historiography of Champa relies upon four types of sources: Approximately four hundred Champa inscriptions have been found. Around 250 of them were deciphered and studied throughout the last century. Many Cham inscriptions were destroyed by American bombing during
34506-423: The open pelagic zone. The organisms living in the sea range from whales 30 metres (98 feet) long to microscopic phytoplankton and zooplankton , fungi, and bacteria. Marine life plays an important part in the carbon cycle as photosynthetic organisms convert dissolved carbon dioxide into organic carbon and it is economically important to humans for providing fish for use as food. Life may have originated in
34719-410: The palace. When the king attends the court audience, he is encircled by 'thirty female attendants who carry swords and shields or betel nuts'. Court officials would make reports to the king, then make one prostration before leaving. The last king of Champa, Po Phaok The , was deposed by Minh Mạng in 1832. During the reign of the king Prakasadharma (r. 653–686 AD), when Champa was briefly ruled by
34932-538: The parallel of 25°24' North to the coast of Fukien . On the West. The Mainland, the Southern limit of the Gulf of Thailand and the East coast of the Malay Peninsula . However, in a revised draft edition of Limits of Oceans and Seas , 4th edition (1986), the International Hydrographic Organization recognized the Natuna Sea. Thus the southern limit of South China Sea would be revised from
35145-456: The part within Philippine territorial waters often called the "Luzon Sea", Dagat Luzon , by the Philippines. However, following an escalation of the Spratly Islands dispute in 2011, various Philippine government agencies started using the name West Philippine Sea . A Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) spokesperson said that the sea to
35358-430: The process of freezing, salt water and air are trapped between the ice crystals. Nilas may have a salinity of 12–15 ‰, but by the time the sea ice is one year old, this falls to 4–6 ‰. Seawater is slightly alkaline and had an average pH of about 8.2 over the past 300 million years. More recently, climate change has resulted in an increase of the carbon dioxide content of the atmosphere; about 30–40% of
35571-418: The quality of the inflowing water. Oceans contain the greatest quantity of actively cycled carbon in the world and are second only to the lithosphere in the amount of carbon they store. The oceans' surface layer holds large amounts of dissolved organic carbon that is exchanged rapidly with the atmosphere. The deep layer's concentration of dissolved inorganic carbon is about 15 percent higher than that of
35784-473: The region are the present-day Chamic-speaking Cham , Rade and Jarai peoples in South and Central Vietnam and Cambodia; the Acehnese from Northern Sumatra , Indonesia , along with elements of Austroasiatic Bahnaric and Katuic -speaking peoples in Central Vietnam. Champa was preceded in the region by a kingdom called Lâm Ấp (Vietnamese), or Linyi ( 林邑 , Middle Chinese ( ZS ): * liɪm ʔˠiɪp̚ ), that
35997-798: The region. Competing claims include: China and Vietnam have both been vigorous in prosecuting their claims. China (various governments) and South Vietnam each controlled part of the Paracel Islands before 1974 . A brief conflict in 1974 resulted in 18 Chinese and 53 Vietnamese deaths, and China has controlled the whole of Paracel since then. The Spratly Islands have been the site of a naval clash, in which over 70 Vietnamese sailors were killed just south of Chigua Reef in March 1988. Disputing claimants regularly report clashes between naval vessels, and these now also include airspace incidents. ASEAN in general, and Malaysia in particular, have been keen to ensure that
36210-532: The repository of large sediment volumes delivered by the Mekong River, Red River and Pearl River. Several of these deltas are rich in oil and gas deposits. The South China Sea contains over 250 small islands , atolls , cays , shoals , reefs , and sandbars , most of which have no indigenous people, many of which are naturally under water at high tide, and some of which are permanently submerged. The features are: The Spratly Islands spread over an 810 by 900 km area covering some 175 identified insular features,
36423-417: The rocks. This tends to undercut the cliff, and normal weathering processes such as the action of frost follows, causing further destruction. Gradually, a wave-cut platform develops at the foot of the cliff and this has a protective effect, reducing further wave-erosion. Material worn from the margins of the land eventually ends up in the sea. Here it is subject to attrition as currents flowing parallel to
36636-408: The ruling dynasty having fully adopted the faith by the 17th century; they are called the Bani ( Ni tục , from Arabic: Bani ). There are, however, the Bacam ( Bacham , Chiêm tục) who still retain and preserve their Hindu faith, rituals, and festivals. The Bacam is one of only two surviving non- Indic indigenous Hindu peoples in the world, with a culture dating back thousands of years. The other being
36849-409: The same way as a wind-generated wave in shallow water but on a vastly greater scale. Either the trough or the crest of a tsunami can arrive at the coast first. In the former case, the sea draws back and leaves subtidal areas close to the shore exposed which provides a useful warning for people on land. When the crest arrives, it does not usually break but rushes inland, flooding all in its path. Much of
37062-399: The sea Zhang Hai ( Chinese : 漲海 ; pinyin : Zhǎng Hǎi ; lit. 'distended sea'). Fei Hai ( Chinese : 沸海 ; pinyin : Fèi Hǎi ; lit. 'boiling sea') became popular during the Southern and Northern dynasties . Usage of the current Chinese name, Nan Hai (South Sea), gradually became widespread during the Qing dynasty . In Southeast Asia it
37275-412: The sea . The sea commonly refers to the Ocean , the interconnected body of seawaters that spans most of Earth. Particular seas are either marginal seas , second-order sections of the oceanic sea (e.g. the Mediterranean Sea ), or certain large, nearly landlocked bodies of water. The salinity of water bodies varies widely, being lower near the surface and the mouths of large rivers and higher in
37488-420: The sea and all the major groups of animals are represented there. Scientists differ as to precisely where in the sea life arose: the Miller-Urey experiments suggested a dilute chemical "soup" in open water, but more recent suggestions include volcanic hot springs, fine-grained clay sediments, or deep-sea " black smoker " vents, all of which would have provided protection from damaging ultraviolet radiation which
37701-449: The sea as "South China Sea (Nan Hai)". The Yizhoushu , which was a chronicle of the Western Zhou dynasty (1046–771 BCE), gives the first Chinese name for South China Sea as Nanfang Hai (Chinese: 南方海 ; pinyin: Nánfāng Hǎi ; lit. 'Southern Sea'), claiming that barbarians from that sea gave tributes of hawksbill sea turtles to the Zhou rulers. The Classic of Poetry , Zuo Zhuan , and Guoyu classics of
37914-405: The sea carries trade equivalent to 5 per cent of global GDP. In 2012–2013, the United States Energy Information Administration estimates very little oil and natural gas in contested areas such as the Paracel and the Spratly Islands. Most of the proved or probable 11 billion barrels of oil and 190 trillion cubic feet of natural gas in the South China Sea exist near undisputed shorelines. In 2010,
38127-436: The sea could be considered as brackish . Meanwhile, the Red Sea is very salty due to its high evaporation rate. Sea temperature depends on the amount of solar radiation falling on its surface. In the tropics, with the sun nearly overhead, the temperature of the surface layers can rise to over 30 °C (86 °F) while near the poles the temperature in equilibrium with the sea ice is about −2 °C (28 °F). There
38340-537: The sea level has been higher than it is today. The main factor affecting sea level over time is the result of changes in the oceanic crust, with a downward trend expected to continue in the very long term. At the last glacial maximum , some 20,000 years ago, the sea level was about 125 metres (410 ft) lower than in present times (2012). For at least the last 100 years, sea level has been rising at an average rate of about 1.8 millimetres (0.071 in) per year. Most of this rise can be attributed to an increase in
38553-399: The sea under the influence of gravity. A tsunami is an unusual form of wave caused by an infrequent powerful event such as an underwater earthquake or landslide, a meteorite impact, a volcanic eruption or a collapse of land into the sea. These events can temporarily lift or lower the surface of the sea in the affected area, usually by a few feet. The potential energy of the displaced seawater
38766-553: The sea, separated from the ocean by mountains or other natural geologic features that prevent the water draining away. The Caspian Sea is the largest one of these. Its main inflow is from the River Volga , there is no outflow and the evaporation of water makes it saline as dissolved minerals accumulate. The Aral Sea in Kazakhstan and Uzbekistan, and Pyramid Lake in the western United States are further examples of large, inland saline water-bodies without drainage. Some endorheic lakes are less salty, but all are sensitive to variations in
38979-657: The seabed provides a range of habitats on or under the surface of the substrate which are used by creatures adapted to these conditions. The tidal zone with its periodic exposure to the dehydrating air is home to barnacles , molluscs and crustaceans . The neritic zone has many organisms that need light to flourish. Here, among algal-encrusted rocks live sponges , echinoderms , polychaete worms, sea anemones and other invertebrates. Corals often contain photosynthetic symbionts and live in shallow waters where light penetrates. The extensive calcareous skeletons they extrude build up into coral reefs which are an important feature of
39192-427: The seabed. These provide a biodiverse habitat for reef-dwelling organisms. There is less sea life on the floor of deeper seas but marine life also flourishes around seamounts that rise from the depths, where fish and other animals congregate to spawn and feed. Close to the seabed live demersal fish that feed largely on pelagic organisms or benthic invertebrates. Exploration of the deep sea by submersibles revealed
39405-481: The seas, which offers a wide range of marine habitats and ecosystems , ranging vertically from the sunlit surface and shoreline to the great depths and pressures of the cold, dark abyssal zone , and in latitude from the cold waters under polar ice caps to the warm waters of coral reefs in tropical regions . Many of the major groups of organisms evolved in the sea and life may have started there. The ocean moderates Earth's climate and has important roles in
39618-612: The ship was entering Chinese waters. The spokesperson for the Indian Navy clarified that as no ship or aircraft was visible from INS Airavat it proceeded on her onward journey as scheduled. The Indian Navy further clarified that "[t]here was no confrontation involving the INS Airavat. India supports freedom of navigation in international waters, including in the South China Sea, and the right of passage in accordance with accepted principles of international law. These principles should be respected by all." In September 2011, shortly after China and Vietnam had signed an agreement seeking to contain
39831-418: The slope under the effect of gravity. The larger the breaking waves, the longer the beach and the more oblique the wave approach, the stronger is the longshore current. These currents can shift great volumes of sand or pebbles, create spits and make beaches disappear and water channels silt up. A rip current can occur when water piles up near the shore from advancing waves and is funnelled out to sea through
40044-466: The strong king Le Thanh Tong launched an invasion of Champa in early 1471 , decimating the capital of Vijaya and most of northern Champa. For early historians like Georges Maspero , "the 1471 conquest had concluded the end of the Champa Kingdom." Maspero, like other early orientalist scholars, by his logics, arbitrated the history of Champa as becoming a "worthy" subject for their study when it adapted and maintained "superior" Indian civilization. In
40257-429: The sun, the weather conditions and the turbidity of the water. Much light gets reflected at the surface, and red light gets absorbed in the top few metres. Yellow and green light reach greater depths, and blue and violet light may penetrate as deep as 1,000 metres (3,300 ft). There is insufficient light for photosynthesis and plant growth beyond a depth of about 200 metres (660 ft). Over most of geologic time,
40470-430: The surface and loops back on itself. It takes a thousand years for this circulation pattern to be completed. Besides gyres, there are temporary surface currents that occur under specific conditions. When waves meet a shore at an angle, a longshore current is created as water is pushed along parallel to the coastline. The water swirls up onto the beach at right angles to the approaching waves but drains away straight down
40683-473: The surface layer and it remains there for much longer periods of time. Thermohaline circulation exchanges carbon between these two layers. Carbon enters the ocean as atmospheric carbon dioxide dissolves in the surface layers and is converted into carbonic acid , carbonate , and bicarbonate : It can also enter through rivers as dissolved organic carbon and is converted by photosynthetic organisms into organic carbon. This can either be exchanged throughout
40896-453: The temperature of the sea due to climate change , and the resulting slight thermal expansion of the upper 500 metres (1,600 ft) of water. Additional contributions, as much as one quarter of the total, come from water sources on land, such as melting snow and glaciers and extraction of groundwater for irrigation and other agricultural and human needs. Wind blowing over the surface of a body of water forms waves that are perpendicular to
41109-537: The territorial disputes within the South China Sea do not escalate into armed conflict. As such, joint development authorities have been set up in areas of overlapping claims to jointly develop the area and divide the profits equally without settling the issue of sovereignty over the area. This is true particularly in the Gulf of Thailand. Generally, China has preferred to resolve competing claims bilaterally, while some ASEAN countries prefer multilateral talks, believing that they are disadvantaged in bilateral negotiations with
41322-442: The trade in spices and silk in the South China Sea , between China, the Indonesian archipelago and India . They supplemented their income from the trade routes not only by exporting ivory and aloe, but also by engaging in piracy and raiding. However, the rising influence of Champa caught the attention of a neighbouring thalassocracy that considered Champa as a rival, the Javanese ( Javaka , probably refers to Srivijaya , ruler of
41535-432: The two can produce broken, irregular seas. Constructive interference can cause individual (unexpected) rogue waves much higher than normal. Most waves are less than 3 m (10 ft) high and it is not unusual for strong storms to double or triple that height; offshore construction such as wind farms and oil platforms use metocean statistics from measurements in computing the wave forces (due to for instance
41748-431: The upper layers, the major part of the ocean exists in permanent darkness. As the different depth and temperature zones each provide habitat for a unique set of species, the marine environment as a whole encompasses an immense diversity of life. Marine habitats range from surface water to the deepest oceanic trenches , including coral reefs, kelp forests , seagrass meadows , tidepools , muddy, sandy and rocky seabeds, and
41961-429: The use of force to resolve the dispute, and accused China of assertive behaviour. On July 22, 2011, one of India's amphibious assault vessels, the INS Airavat which was on a friendly visit to Vietnam, was reportedly contacted at a distance of 45 nautical miles (83 km) from the Vietnamese coast in the disputed South China Sea on an open radio channel by a vessel identifying itself as the Chinese Navy and stating that
42174-553: The variety of names used for the islands and the sea. South China Sea is the dominant term used in English for the sea, and the name in most European languages is equivalent. This name is a result of early European interest in the sea as a route from Europe and South Asia to the trading opportunities of China. In the 16th century, Portuguese sailors called it the China Sea ( Mare da China ); later needs to differentiate it from nearby bodies of water led to calling it South China Sea. The International Hydrographic Organization refers to
42387-639: The vice-king Po Dhar Kaok to be arrested in Hue, while incorporating the last remnants of Champa into what are the Ninh Thuan and Binh Thuan provinces . To enforce his finger grip, Minh Mang appointed Vietnamese bureaucrats from Hue to govern the Cham directly in phủ Ninh Thuan while removing the traditional Cham customary laws. Administratively, Panduranga was integrated into Vietnam proper with harsh measures. These reforms were known as cải thổ quy lưu ("replacing thổ [aboriginal] chieftains by circulating bureaucratic system"). Speaking Vietnamese and following Vietnamese customs became strictly mandatory for
42600-403: The water sinks. From the deep sea near Greenland, such water flows southwards between the continental landmasses on either side of the Atlantic. When it reaches the Antarctic, it is joined by further masses of cold, sinking water and flows eastwards. It then splits into two streams that move northwards into the Indian and Pacific Oceans. Here it is gradually warmed, becomes less dense, rises towards
42813-426: The wave reaches a point where its deepest oscillations of the water contact the seabed , they begin to slow down. This pulls the crests closer together and increases the waves' height , which is called wave shoaling . When the ratio of the wave's height to the water depth increases above a certain limit, it " breaks ", toppling over in a mass of foaming water. This rushes in a sheet up the beach before retreating into
43026-414: The west. The number of shipwrecks of trading ships that lie on the ocean's floor attest to a thriving trade going back centuries. Nine historic trade ships carrying ceramics dating back to the 10th century until the 19th century were excavated under Swedish engineer Sten Sjöstrand . $ 3.4 trillion of the world's $ 16 trillion maritime shipping passed through South China Sea in 2016. The 2019 data shows that
43239-445: The world ocean, so global climate modelling makes use of ocean circulation models as well as models of other major components such as the atmosphere , land surfaces, aerosols and sea ice. Ocean models make use of a branch of physics, geophysical fluid dynamics , that describes the large-scale flow of fluids such as seawater. Surface currents only affect the top few hundred metres of the sea, but there are also large-scale flows in
43452-403: Was consisted by several known districts (viṣaya, zhou 洲): Amaravati ( Quảng Ngãi ), Ulik ( Thừa Thiên–Huế ), Vvyar ( Quảng Trị ), Jriy (southern Quảng Bình ), and Traik (northern Quảng Bình ). Other junctions like Panduranga remained quietly autonomous. The classical narrative of 'the Champa Kingdom' brought by earlier generations of scholarship, Georges Maspero and George Coedes , created
43665-485: Was in existence since 192 AD; although the historical relationship between Linyi and Champa is not clear. Champa reached its apogee in the 9th and 10th centuries CE. Thereafter, it began a gradual decline under pressure from Đại Việt , the Vietnamese polity centered in the region of modern Hanoi . In 1832, the Vietnamese emperor Minh Mạng annexed the remaining Cham territories. Hinduism , adopted through conflicts and conquest of territory from neighboring Funan in
43878-407: Was not blocked by the early Earth's atmosphere. Marine habitats can be divided horizontally into coastal and open ocean habitats. Coastal habitats extend from the shoreline to the edge of the continental shelf . Most marine life is found in coastal habitats, even though the shelf area occupies only 7 percent of the total ocean area. Open ocean habitats are found in the deep ocean beyond the edge of
44091-406: Was once called the Champa Sea or Sea of Cham , after the maritime kingdom of Champa (nowadays Central Vietnam ), which flourished there before the 16th century. The majority of the sea came under Japanese naval control during World War II following the military acquisition of many surrounding South East Asian territories in 1941. Japan calls the sea Minami Shina Kai "South China Sea". This
44304-399: Was perhaps the only known Southeast Asian ruler who traveled all the way to India shortly after his abdication. He personally went on pilgrimage in the Ganges River , Northeast India . His itinerary was confirmed by both indigenous Cham sources and Chinese chronicles. George Coedès notes that during the 2nd and 3rd century, an influx of Indian traders, priests, and scholars travelled along
44517-414: Was quickly stalled, and Suryavarman died en route. Champa then plummeted into an eleven-year civil war between Jaya Harivarman and his oppositions, which resulted in Champa reunifying under Jaya Harivarman by 1161. After having restored the kingdom and its prosperity, in June 1177 Jaya Indravarman IV (r. 1167–1192) launched a surprise naval assault on Angkor , capital of Cambodia, plundering it, slaying
44730-548: Was succeeded by his son Sambhuvarman (r. 572–629). He reconstructed the temple of Bhadravarman and renamed it Shambhu-bhadreshvara. In 605, the Sui Empire launched an invasion of Lam Ap , overrunning Sambhuvarman's resistance, and sacked the Cham capital at Tra Kieu . He died in 629 and was succeeded by his son, Kandarpadharma , who died in 630–31. Kandarpadharma was succeeded by his son, Prabhasadharma , who died in 645. Several granite tablets and inscriptions from My Son , Tra Kieu , Hue , Khanh Hoa dated 653–687 report
44943-581: Was the capital of Champa. Other scholars have disputed this contention, holding that Champa was never a united country, and arguing that the presence of a particularly rich historical record for a given region in a given period is no basis for claiming that the region functioned as the capital of a united Champa during that period. Through the centuries, Cham culture and society were influenced by forces emanating from Cambodia , China, Java and India amongst others. An official successfully revolted against Chinese rule in modern central Vietnam, and Lâm Ấp ,
45156-465: Was to ignore the arbitration result and to continue pursuing bilateral discussions with the Philippines. Taiwan, which currently administers Taiping Island, the largest of the Spratly Islands, also rejected the ruling. As of November 2023, 26 governments support the ruling, 17 issued generally positive statements noting the ruling but not called for compliance, and eight rejected it. The governments in support are Australia , Austria , Belgium , Canada ,
45369-445: Was written 南支那海 until 2004, when the Japanese Foreign Ministry and other departments switched the spelling to 南シナ海 , which has become the standard usage in Japan. In China, it is called the South Sea , ( 南海 ; Nánhǎi ), and in Vietnam the East Sea , Biển Đông . In Malaysia , Indonesia and the Philippines , it was long called the South China Sea ( Tagalog : Dagat Timog Tsina , Malay : Laut China Selatan ), with
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