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50-513: The Liaoning Coastal Economic Belt includes all six prefectural cities flanking the Yellow Sea and the Bohai Bay : Dalian , Dandong , Jinzhou , Yingkou , Panjin and Huludao . This Belt has a coastline of nearly 3,000 kilometers and a land area of almost 58,000 square kilometers. More than 17.8 million people live here, they created about 45 percent of the total GDP of Liaoning in 2008. Upgrading

100-450: A continental shelf differs significantly from the geological definition. UNCLOS states that the shelf extends to the limit of the continental margin , but no less than 200 nmi (370 km; 230 mi) and no more than 350 nmi (650 km; 400 mi) from the baseline . Thus inhabited volcanic islands such as the Canaries , which have no actual continental shelf, nonetheless have

150-787: A corner of Northeast Asia, border the "island nation" from the east, south, and west. Korea has named these the East Sea, South Sea, and West Sea (officially known as the Yellow Sea), respectively. Major islands of the sea include Anmado , Baengnyeongdo , Daebudo , Deokjeokdo , Gageodo , Ganghwado , Hauido , Heuksando , Hongdo , Jejudo , Jindo , Muuido , Sido , Silmido , Sindo , Wando , Yeongjongdo and Yeonpyeongdo (all in South Korea). The area has cold, dry winters with strong northernly monsoons blowing from late November to March. Average January temperatures are −10 °C (14 °F) in

200-462: A day. Their amplitude varies between about 0.9 and 3 meters (3.0 and 9.8 ft) at the coast of China. Tides are higher at the Korean Peninsula, typically ranging between 4 and 8 meters (13 and 26 ft) and reaching the maximum in spring. The tidal system rotates in a counterclockwise direction. The speed of the tidal current is generally less than 1.6 km/h (0.99 mph) in the middle of

250-809: A distance where the depth of waters admitted of resource exploitation were claimed by the marine nations that signed the Convention on the Continental Shelf drawn up by the UN's International Law Commission in 1958. This was partly superseded by the 1982 United Nations Convention on the Law of the Sea (UNCLOS). The 1982 convention created the 200 nautical miles (370 km; 230 mi) exclusive economic zone, plus continental shelf rights for states with physical continental shelves that extend beyond that distance. The legal definition of

300-512: A pipeline exploded at the north-east port of Dalian , causing a wide-scale fire and spreading about 1,500 tonnes of oil over the sea area of 430 km (170 sq mi). The port had been closed and fishing suspended until the end of August. Eight hundred fishing boats and 40 specialized vessels were mobilized to relieve the environmental damage. The Yellow Sea is considered among the most degraded marine areas on earth. Loss of natural coastal habitats due to land reclamation has resulted in

350-466: A volume of about 17,000 km (4,100 cu mi). Its depth is only 44 m (144 ft) on average, with a maximum of 152 m (499 ft). The sea is a flooded section of continental shelf that formed after the last glacial period (some 10,000 years ago) as sea levels rose 120 m (390 ft) to their current levels. The depth gradually increases from north to south. The sea bottom and shores are dominated by sand and silt brought by

400-641: A warm cyclone current, forming part of the Kuroshio Current , which diverges near the western part of Japan and flows northward into the Yellow Sea at a speed of less than 0.8 km/h (0.50 mph). Southward currents prevail near the sea coast, especially in the winter monsoon period. The water temperature is close to freezing in the northern part in winter, so drift ice patches and continuous ice fields form and hinder navigation between November and March. The water temperature and salinity are homogeneous across

450-544: A year, at the beginning of May and in the middle of June. It had long been celebrated in a local festival called "Jindo Sea Parting Festival", but was largely unknown to the outside world until 1975, when the French ambassador Pierre Randi described the phenomenon in a French newspaper. The sea is rich in seaweed (predominantly kelp , Laminaria japonica ), cephalopods , crustaceans , shellfish , clams , and especially in blue-green algae which bloom in summer and contribute to

500-481: Is also ambitious to develop this area into a place where citizens can live and work comfortably and build a moderately affluent society. Cleaner production is promoted in the industrial process and natural conservation along the sea and inland are important elements of the strategy. Foreign investment is particularly encouraged for hi-tech industries, the service sector, advanced manufacturing, infrastructure construction and ecological protection. The Liaoning Belt

550-588: Is also minimal, at less than 20 m (66 ft). Though the continental shelf is treated as a physiographic province of the ocean , it is not part of the deep ocean basin proper, but the flooded margins of the continent. Passive continental margins such as most of the Atlantic coasts have wide and shallow shelves, made of thick sedimentary wedges derived from long erosion of a neighboring continent. Active continental margins have narrow, relatively steep shelves, due to frequent earthquakes that move sediment to

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600-469: Is evidence that changing wind, rainfall, and regional ocean currents in a warming ocean are having an effect on some shelf seas. Improved data collection via Integrated Ocean Observing Systems in shelf sea regions is making identification of these changes possible. Continental shelves teem with life because of the sunlight available in shallow waters, in contrast to the biotic desert of the oceans' abyssal plain . The pelagic (water column) environment of

650-462: Is known as an insular shelf . The continental margin , between the continental shelf and the abyssal plain , comprises a steep continental slope, surrounded by the flatter continental rise , in which sediment from the continent above cascades down the slope and accumulates as a pile of sediment at the base of the slope. Extending as far as 500 km (310 mi) from the slope, it consists of thick sediments deposited by turbidity currents from

700-414: Is often cut with submarine canyons . The physical mechanisms involved in forming these canyons were not well understood until the 1960s. Continental shelves cover an area of about 27 million km (10 million sq mi), equal to about 7% of the surface area of the oceans. The width of the continental shelf varies considerably—it is not uncommon for an area to have virtually no shelf at all, particularly where

750-768: Is one of the promising regions in China. Its development strategy is adopted in Liaoning as guideline for the next 10-year development. It is important for China to have the zone as a good example for revitalizing traditional industrial areas, similar to the Ruhr Area in Germany. Yellow Sea The Yellow Sea , also known as the North Sea , is a marginal sea of the Western Pacific Ocean located between mainland China and

800-412: Is relatively low, at 30 ‰ in the north to 33–34‰ in the south, dropping to 26‰ or lower near the river deltas. In the southwest monsoon season (June to August) the increased rainfall and runoff further reduce the salinity of the upper sea layer. Water transparency increases from about 10 meters (33 ft) in the north up to 45 meters (148 ft) in the south. Tides are semidiurnal, i.e. rise twice

850-780: The Korean Peninsula , and can be considered the northwestern part of the East China Sea . It is one of four seas named after color terms (the others being the Black Sea , the Red Sea and the White Sea ), and its name is descriptive of the golden-yellow color of the silt -ridden water discharged from major rivers. The innermost bay of northwestern Yellow Sea is called the Bohai Sea (previously Gulf of Zhili / Beizhili ), into which flow some of

900-484: The shelf break ). The sea floor below the break is the continental slope . Below the slope is the continental rise , which finally merges into the deep ocean floor, the abyssal plain . The continental shelf and the slope are part of the continental margin . The shelf area is commonly subdivided into the inner continental shelf , mid continental shelf , and outer continental shelf , each with their specific geomorphology and marine biology . The character of

950-501: The Asian mainland. Other familiar bodies of water that overlie continental shelves are the North Sea and the Persian Gulf . The average width of continental shelves is about 80 km (50 mi). The depth of the shelf also varies, but is generally limited to water shallower than 100 m (330 ft). The slope of the shelf is usually quite low, on the order of 0.5°; vertical relief

1000-501: The Chinese, Korean and Japanese ships for centuries. Especially rich in fish are the bottom layers. About 200 fish species are exploited commercially, especially sea bream , croakers , lizard fishes , prawns , cutlassfish , horse mackerel , squid, eel , filefish , Pacific herring , chub mackerel , flounder and jellyfish. The intensity of fishing has been gradually increasing for China and Korea and decreasing for Japan. For example,

1050-461: The North and South Korean demarcation line. A buffer zone was also created in the Yellow Sea's Northern Limit Line (NLL). Continental shelf A continental shelf is a portion of a continent that is submerged under an area of relatively shallow water, known as a shelf sea . Much of these shelves were exposed by drops in sea level during glacial periods . The shelf surrounding an island

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1100-477: The Soviet Union with support from Japan have been major drivers of population decline. Species that reside in the area today include spotted seals , and cetaceans such as minke whales , killer whales , false killer whales , and finless porpoises , but nonetheless all the remnants of species listed could be in very small numbers. Historically, large whales were very abundant either for summering and wintering in

1150-482: The Yellow Sea Large Marine Ecosystem. Declines of biodiversity, fisheries and ecosystem services in the Yellow Sea are widespread. The tidal flats of the Yellow Sea are considered endangered. On 1 November 2018, officials from South Korea's Ministry of National Defense confirmed that "peace zones" had been established by the North and South Korean militaries in the Yellow Sea area that touches

1200-524: The Yellow Sea are Incheon , Gunsan and Mokpo , and that for North Korea is Nampho , the outport of Pyongyang . The Bohai Train Ferry provides a shortcut between the Liaodong Peninsula and Shandong . A major naval accident occurred on 24 November 1999 at Yantai , Shandong , China when the 9,000-ton Chinese ferry Dashun caught fire and capsized in rough seas. About 300 people were killed, making it

1250-455: The Yellow Sea. The southern part of the Yellow Sea, including the entire west coast of Korea , contains a 10 km-wide (6.2 mi) belt of intertidal mudflats , which has the total area of 2,850 km (1,100 sq mi) and is maintained by 4–10 m (13–33 ft). Those flats consist of highly productive sediments with a rich benthic fauna and are of great importance for migratory waders and shorebirds. Surveys show that

1300-635: The Yellow and Bohai Seas. For example, a unique population of resident fin whales and gray whales were historically presented, or possibly hosted some North Pacific right whales and Humpback whales (3 whales including a cow calf pair was observed at Changhai County in 2015 ) year-round other than migrating individuals, and many other migratory species such as Baird's beaked whales . Even blue whales , Japanese sea lions , dugongs (in southern regions only), and leatherback turtles used to breed or migrate into Yellow and Bohai seas. Spotted seals are

1350-495: The area is the single most important site for migratory birds on northward migration in the entire East Asian – Australasian Flyway , with more than 35 species occurring in internationally significant numbers. Two million birds, at minimum, pass through at the time, and about half that number use it on southward migration. About 300,000 migrating birds were transiting annually only through the Saemangeum tidal flat area. This estuary

1400-498: The classification of this ecosystem as endangered . In addition to land reclamation , the Yellow Sea ecosystem is facing several other serious environmental problems. Pollution is widespread and deterioration of pelagic and benthic habitat quality has occurred, and harmful algal blooms frequently occur. Invasion of introduced species are having a detrimental effect on the Yellow Sea environment. There are 25 intentionally introduced species and 9 unintentionally introduced species in

1450-567: The coast; sand is limited to shallow, wave-agitated waters, while silt and clays are deposited in quieter, deep water far offshore. These accumulate 15–40 centimetres (5.9–15.7 in) every millennium, much faster than deep-sea pelagic sediments . "Shelf seas" are the ocean waters on the continental shelf. Their motion is controlled by the combined influences of the tides , wind-forcing and brackish water formed from river inflows ( Regions of Freshwater Influence ). These regions can often be biologically highly productive due to mixing caused by

1500-420: The continental shelf constitutes the neritic zone , and the benthic (sea floor) province of the shelf is the sublittoral zone . The shelves make up less than 10% of the ocean, and a rough estimate suggests that only about 30% of the continental shelf sea floor receives enough sunlight to allow benthic photosynthesis. Though the shelves are usually fertile, if anoxic conditions prevail during sedimentation,

1550-418: The deep sea. The continental shelves are covered by terrigenous sediments ; that is, those derived from erosion of the continents. However, little of the sediment is from current rivers ; some 60–70% of the sediment on the world's shelves is relict sediment , deposited during the last ice age, when sea level was 100–120 m lower than it is now. Sediments usually become increasingly fine with distance from

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1600-433: The deposits may over geologic time become sources for fossil fuels . The continental shelf is the best understood part of the ocean floor, as it is relatively accessible. Most commercial exploitation of the sea, such as extraction of metallic ore, non-metallic ore, and hydrocarbons , takes place on the continental shelf. Sovereign rights over their continental shelves down to a depth of 100 m (330 ft) or to

1650-475: The depth. The southern waters are warmer at 6–8 °C (43–46 °F). In spring and summer, the upper layer is warmed up by the sun and diluted by the fresh water from rivers, while the deeper water remains cold and saline. This deep water stagnates and slowly moves south. Commercial bottom-dwelling fishes are found around this mass of water, especially at its southern part. Summer temperatures range between 22 and 28 °C (72 and 82 °F). The average salinity

1700-401: The destruction of more than 60% of tidal wetlands around the Yellow Sea coastline in approximately 50 years. Rapid coastal development for agriculture , aquaculture and industrial development are considered the primary drivers of coastal destruction in the region. This degree of loss of area, widespread pollution, algal blooms and declines of invertebrate and vertebrate fauna have resulted in

1750-599: The forward edge of an advancing oceanic plate dives beneath continental crust in an offshore subduction zone such as off the coast of Chile or the west coast of Sumatra . The largest shelf—the Siberian Shelf in the Arctic Ocean —stretches to 1,500 kilometers (930 mi) in width. The South China Sea lies over another extensive area of continental shelf, the Sunda Shelf , which joins Borneo , Sumatra, and Java to

1800-575: The industrial structure in the Liaoning Belt is focusing on development of major industrial clusters, such as Also, the service sector is developing fast, from innovation in financial services by establishing public information platforms, to international competitive software development as a base of outsourcing industry. Another focus is on high-quality farming and processing of food and other agricultural products, such as sea food, rice, fruits, vegetables, and flowers. The Liaoning Belt strategy

1850-760: The limits of the Yellow Sea ("Hwang Hai") as follows: The Yellow Sea is separated from the Sea of Japan by the boundary from the southern end of Haenam Peninsula in Jeollanamdo to Jeju Island and divided into the East China Sea by the boundary from the west end of Jeju Island to the Yangtze River estuary. The Yellow Sea, excluding the Bohai, extends by about 960 km (600 mi) from north to south and about 700 km (430 mi) from east to west; it has an area of approximately 380,000 km (150,000 sq mi) and

1900-811: The most important rivers of northern China , such as the Yellow River (through Shandong province and its capital Jinan ), the Hai River (through Beijing and Tianjin ) and the Liao River (through Liaoning province). The northeastern extension of the Yellow Sea is called the Korea Bay , into which flow the Yalu River , the Chongchon River and the Taedong River . The International Hydrographic Organization defines

1950-428: The north and 3 °C (37 °F) in the south. Summers are wet and warm with frequent typhoons between June and October. Air temperatures range between 10 and 28 °C (50 and 82 °F). The average annual precipitation increases from about 500 mm (20 in) in the north to 1,000 mm (39 in) in the south. Fog is frequent along the coasts, especially in the upwelling cold-water areas. The sea has

2000-411: The only resident species of seal in the Yellow Sea. A sanctuary for these seals is situated at Baengnyeongdo , which is also known for its finless porpoises . Great white sharks have also been known to prey on seals in the area. The coasts of the Yellow Sea are very densely populated, at approximately 250 inhabitants per square kilometer (650/sq mi). The sea waters had been used for fishing by

2050-414: The production volumes for China rose from 619,000 tonnes in 1985 to 1,984,400 tonnes in 1996. All species are overfished, however, and while the total catchments are rising, the fish population is continuously declining for most species. Navigation is another traditional activity in the Yellow Sea. The main Chinese ports are Dalian , Tianjin , Qingdao and Qinhuangdao . The major South Korean ports on

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2100-523: The rivers through the Bohai Sea ( Liao River , Yellow River , Hai He ) and the Korea Bay ( Yalu River ). These deposits, together with sand storms are responsible for the yellowish colour of the water referenced in the sea's name. The sea annually receives so much sand and silt from rivers such as the Yellow River , that it actually turns into a golden-yellow colour. The seas surrounding Korea, which occupy

2150-514: The sea, but may increase to more than 5.6 km/h (3.5 mph) near the coasts. The fastest tides reaching 20 km/h (12 mph) occur in the Myeongnyang Strait between Jindo Island and the Korean Peninsula. The tide-related sea level variations result in a land pass 2.9 km (1.8 mi) long and 10–40 meters (33–131 ft) wide opening for approximately an hour between Jindo and Modo islands. The event occurs about twice

2200-400: The shallower waters and the enhanced current speeds. Despite covering only about 8% of Earth's ocean surface area, shelf seas support 15–20% of global primary productivity . In temperate continental shelf seas, three distinctive oceanographic regimes are found, as a consequence of the interplay between surface heating, lateral buoyancy gradients (due to river inflow), and turbulent mixing by

2250-474: The shelf and slope. The continental rise 's gradient is intermediate between the gradients of the slope and the shelf. Under the United Nations Convention on the Law of the Sea , the name continental shelf was given a legal definition as the stretch of the seabed adjacent to the shores of a particular country to which it belongs. The shelf usually ends at a point of increasing slope (called

2300-428: The shelf changes dramatically at the shelf break, where the continental slope begins. With a few exceptions, the shelf break is located at a remarkably uniform depth of roughly 140 m (460 ft); this is likely a hallmark of past ice ages, when sea level was lower than it is now. The continental slope is much steeper than the shelf; the average angle is 3°, but it can be as low as 1° or as high as 10°. The slope

2350-455: The tides and to a lesser extent the wind. Indian Ocean shelf seas are dominated by major river systems, including the Ganges and Indus rivers. The shelf seas around New Zealand are complicated because the submerged continent of Zealandia creates wide plateaus. Shelf seas around Antarctica and the shores of the Arctic Ocean are influenced by sea ice production and polynya . There

2400-416: The water color (see image above). For example, the seaweed production in the area was as high as 1.5 million tonnes in 1979 for China alone. The abundance of all these plant and animal species increases toward the south and indicates a high sea productivity, accounting for the diversity of fish species and high fish yield from the sea. Several species of goby new to science have been discovered recently in

2450-509: The worst maritime incident in China. Oil exploration has been successful in the Chinese and North Korean portions of the sea, with the proven and estimated reserves of about 9 and 20 billion tonnes, respectively. However, the study and exploration of the sea is somewhat hindered by insufficient sharing of information between the involved countries. China initiated collaborations with foreign oil companies in 1979, but this initiative declined later. A major oil spill occurred on 16 July 2010 when

2500-508: Was however dammed by South Korea in 1991–2006 that resulted in drying off the land. Land reclamation also took 65% of the intertidal area (of China, North Korea and South Korea) between the 1950s and 2002, and as of 2005 there were plans to reclaim a further 45%. Populations of oceanic megafauna , such as marine mammals , sea turtles , and larger fish, have decreased in modern times, not only due to pollution but also due to hunting. Japanese industrial whaling and illegal mass operations by

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