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93-421: Within most of the northwestern Pacific, there are no official typhoon seasons as tropical cyclones form throughout the year. Like any tropical cyclone, there are several main requirements for typhoon formation and development. It must be in sufficiently warm sea surface temperatures , atmospheric instability, high humidity in the lower-to-middle levels of the troposphere , have enough Coriolis effect to develop

186-654: A continental shelf are often warmer. Onshore winds can cause a considerable warm-up even in areas where upwelling is fairly constant, such as the northwest coast of South America . Its values are important within numerical weather prediction as the sea surface temperature influences the atmosphere above, such as in the formation of sea breezes and sea fog . It is very likely that global mean sea surface temperature increased by 0.88°C between 1850–1900 and 2011–2020 due to global warming , with most of that warming (0.60°C) occurring between 1980 and 2020. The temperatures over land are rising faster than ocean temperatures . This

279-428: A low pressure centre , a pre-existing low level focus or disturbance, and a low vertical wind shear . Although the majority of storms form between June and November, a few storms may occur between December and May (although tropical cyclone formation is very rare during that time). On average, the northwestern Pacific features the most numerous and intense tropical cyclones globally. Like other basins, they are steered by

372-559: A severe tropical storm . Once the system's maximum sustained winds reach wind speeds of 64 knots (74 mph; 119 km/h), the JMA will designate the tropical cyclone as a typhoon —the highest category on its scale. Since 2009 the Hong Kong Observatory has divided typhoons into three different classifications: typhoon , severe typhoon and super typhoon . A typhoon has wind speed of 64–79 knots (73–91 mph; 118–149 km/h),

465-586: A Japanese fugitive, Anjirō . He returned to Japan with Saint Francis Xavier , a Catholic missionary. In 1554, Pinto joined the Society of Jesus and donated a large sum of his trading wealth to the mission. In a letter, Ōtomo Yoshishige , daimyō of Bungo, offered his conversion and requested Pinto return to Japan. The letter arrived at the same time that Xavier's body was being displayed in Goa. Ōtomo did not convert at that time due to internal difficulties but did so later at

558-597: A Portuguese pun on his name meaning "Fernão, do you lie? I do!" The publication may vary from Pinto's manuscript (some sentences are erased and others are edited). The disappearance of references to the Society of Jesus, one of the most active religious orders in the Orient, is notable, as there are clear indications of Pinto's relationship with the society. Pinto's memoirs are just that, his memories of events, giving rise to doubts regarding historical accuracy. However, it documents

651-581: A Portuguese camp of mercenaries who had betrayed the Viceroy. Pinto similarly was betrayed by a mercenary, captured by the Burmese and placed under the charge of the king's treasurer who took him to the kingdom of Calaminham . Pinto fled to Goa. On Pinto's return to Goa, Faria sent him to Bantam , Java, to buy pepper for sale to China. Once again, Pinto was shipwrecked. He may have resorted to cannibalism before submitting to slavery in order to secure passage out of

744-530: A fraction of a millimetre thick) in the infrared or the top centimetre or so in the microwave are also used, but must be adjusted to be compatible with the bulk temperature." The temperature further below that is called ocean temperature or deeper ocean temperature . Ocean temperatures (more than 20 metres below the surface) also vary by region and time, and they contribute to variations in ocean heat content and ocean stratification . The increase of both ocean surface temperature and deeper ocean temperature

837-405: A higher altitude (e.g., at the 500  hPa level, or 5.9 km) can lead to tropical cyclogenesis at lower water temperatures, as a certain lapse rate is required to force the atmosphere to be unstable enough for convection. In a moist atmosphere, this lapse rate is 6.5 °C/km, while in an atmosphere with less than 100% relative humidity , the required lapse rate is 9.8 °C/km. At

930-628: A lesser degree due to its greater thermal inertia . On calm days, the temperature can vary by 6 °C (10 °F). The temperature of the ocean at depth lags the Earth's atmosphere temperature by 15 days per 10 metres (33 ft), which means for locations like the Aral Sea , temperatures near its bottom reach a maximum in December and a minimum in May and June. Near the coastline, some offshore and longshore winds move

1023-452: A low level feature with sufficient vorticity and convergence is required to begin tropical cyclogenesis. About 85 to 90 percent of Pacific typhoons form within the monsoon trough . Even with perfect upper-level conditions and the required atmospheric instability, the lack of a surface focus will prevent the development of organized convection and a surface low. Vertical wind shear of less than 10 m/s (20 kn, 33 ft/s) between

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1116-461: A one-day lag. NOAA's GOES (Geostationary Orbiting Earth Satellites) satellites are geo-stationary above the Western Hemisphere which enables them to deliver SST data on an hourly basis with only a few hours of lag time. There are several difficulties with satellite-based absolute SST measurements. First, in infrared remote sensing methodology the radiation emanates from the top "skin" of

1209-504: A severe typhoon has winds of at least 80 knots (92 mph; 150 km/h), and a super typhoon has winds of at least 100 knots (120 mph; 190 km/h). The United States ' Joint Typhoon Warning Center (JTWC) unofficially classifies typhoons with wind speeds of at least 130 knots (67 m/s; 150 mph; 241 km/h)—the equivalent of a strong Category 4 storm in the Saffir-Simpson scale —as super typhoons . However,

1302-440: A single typhoon, and making the cyclone the wettest known typhoon. For storms that have affected countries in this basin: Sea surface temperature Sea surface temperature (or ocean surface temperature ) is the temperature of ocean water close to the surface. The exact meaning of surface varies in the literature and in practice. It is usually between 1 millimetre (0.04 in) and 20 metres (70 ft) below

1395-486: Is 5 years. When this warming or cooling occurs for only seven to nine months, it is classified as El Niño/La Niña "conditions"; when it occurs for more than that period, it is classified as El Niño/La Niña "episodes". The sign of an El Niño in the sea surface temperature pattern is when warm water spreads from the west Pacific and the Indian Ocean to the east Pacific. It takes the rain with it, causing extensive drought in

1488-411: Is an important effect of climate change on oceans . The extent of the ocean surface down into the ocean is influenced by the amount of mixing that takes place between the surface water and the deeper water. This depends on the temperature: in the tropics the warm surface layer of about 100 m is quite stable and does not mix much with deeper water, while near the poles winter cooling and storms makes

1581-492: Is an important driver of North Atlantic SST and Northern Hemisphere climate, but the mechanisms controlling AMO variability remain poorly understood. Atmospheric internal variability, changes in ocean circulation, or anthropogenic drivers may control the multidecadal temperature variability associated with AMO. These changes in North Atlantic SST may influence winds in the subtropical North Pacific and produce warmer SSTs in

1674-408: Is because the ocean absorbs about 90% of excess heat generated by climate change . Sea surface temperature (SST), or ocean surface temperature, is the water temperature close to the ocean 's surface. The exact meaning of surface varies according to the measurement method used, but it is between 1 millimetre (0.04 in) and 20 metres (70 ft) below the sea surface. For comparison,

1767-510: Is considered the minimum to maintain the special mesocyclone that is the tropical cyclone. These warm waters are needed to maintain the warm core that fuels tropical systems. A minimum distance of 500 km (300 mi) from the equator is normally needed for tropical cyclogenesis. Whether it be a depression in the Intertropical Convergence Zone (ITCZ) or monsoon trough , a broad surface front , or an outflow boundary ,

1860-433: Is due to turbulent mixing of the upper 30 metres (100 ft) of the ocean. Sea surface temperature changes during the day. This is like the air above it, but to a lesser degree. There is less variation in sea surface temperature on breezy days than on calm days. Coastal sea surface temperatures can cause offshore winds to generate upwelling , which can significantly cool or warm nearby landmasses, but shallower waters over

1953-656: Is made by sensing the ocean radiation in two or more wavelengths within the infrared part of the electromagnetic spectrum or other parts of the spectrum which can then be empirically related to SST. These wavelengths are chosen because they are: The satellite-measured SST provides both a synoptic view of the ocean and a high frequency of repeat views, allowing the examination of basin-wide upper ocean dynamics not possible with ships or buoys. NASA's (National Aeronautic and Space Administration) Moderate Resolution Imaging Spectroradiometer (MODIS) SST satellites have been providing global SST data since 2000, available with

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2046-797: Is maintained by the National Data Buoy Center (NDBC). Between 1985 and 1994, an extensive array of moored and drifting buoys was deployed across the equatorial Pacific Ocean designed to help monitor and predict the El Niño phenomenon. Weather satellites have been available to determine sea surface temperature information since 1967, with the first global composites created during 1970. Since 1982, satellites have been increasingly utilized to measure SST and have allowed its spatial and temporal variation to be viewed more fully. Satellite measurements of SST are in reasonable agreement with in situ temperature measurements. The satellite measurement

2139-407: Is medium confidence that the tropical Pacific will transition to a mean pattern resembling that of El Niño on centennial time scale, but there is still high uncertainty in tropical Pacific SST projections because it is difficult to capture El Niño variability in climate models. Overall, scientists project that all regions of the oceans will warm by 2050, but models disagree for SST changes expected in

2232-445: Is the term used for a tropical system that has wind speeds not exceeding 33 knots (38 mph; 61 km/h). A tropical depression is upgraded to a tropical storm should its sustained wind speeds exceed 34 knots (39 mph; 63 km/h). Tropical storms also receive official names from RSMC Tokyo. Should the storm intensify further and reach sustained wind speeds of 48 knots (55 mph; 89 km/h) then it will be classified as

2325-532: The Society of Jesus in 1555. Pinto spent the years 1562–1566 in court looking for reward or compensation for his years of service to the Crown. He married Maria Correia Barreto with whom he had at least two daughters. In 1562, he purchased a farm in Pragal . Pinto died on 8 July 1583 at his farm. Pinto began his memoirs in 1569. The book was published posthumously by friar Belchior Faria in 1614. Although Pinto did not have

2418-776: The South China Sea , especially in the Gulf of Tonkin . Pinto entered China from the Yellow Sea and raided a tomb of the Emperor of China . Pinto was shipwrecked, apprehended by the Chinese and sentenced to one year hard labour on the Great Wall of China . Before completing his sentence, Pinto was taken prisoner by invading Tatars . He became an agent of the Tartars and travelled with them to Cochinchina ,

2511-597: The arquebus to Japan. It is widely accepted now, however, that several Portuguese traders, including António Mota and Francisco Zeimoto, visited Japan a year earlier. The firearm was reproduced and used in the Japanese civil wars . It was known as the tanegashima . Pinto facilitated trade between the Portuguese and Japan. At one point, he was shipwrecked on the Ryukyu Islands . In 1549, Pinto left Kagoshima accompanied by

2604-447: The sea surface. Sea surface temperatures greatly modify air masses in the Earth's atmosphere within a short distance of the shore. The thermohaline circulation has a major impact on average sea surface temperature throughout most of the world's oceans. Warm sea surface temperatures can develop and strengthen cyclones over the ocean . Tropical cyclones can also cause a cool wake. This

2697-444: The sea surface skin temperature relates to the top 20 or so microns of the ocean's surface. The definition proposed by IPCC for sea surface temperature does not specify the number of metres but focuses more on measurement techniques: Sea surface temperature is "the subsurface bulk temperature in the top few metres of the ocean, measured by ships, buoys and drifters. [...] Satellite measurements of skin temperature (uppermost layer;

2790-440: The subtropical ridge towards the west or northwest, with some systems recurving near and east of Japan . The Philippines receive the brunt of the landfalls, with China and Japan being less often impacted. However, some of the deadliest typhoons in history have struck China. Southern China has the longest record of typhoon impacts for the region, with a thousand-year sample via documents within their archives. Taiwan has received

2883-572: The warm core that fuels tropical systems. This value is well above 16.1 °C (60.9 °F), the long term global average surface temperature of the oceans. However, this requirement can be considered only a general baseline because it assumes that the ambient atmospheric environment surrounding an area of disturbed weather presents average conditions. Tropical cyclones have intensified when SSTs were slightly below this standard temperature. Tropical cyclones are known to form even when normal conditions are not met. For example, cooler air temperatures at

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2976-541: The 1660s and 1670s. The highest reliably-estimated maximum sustained winds on record for a typhoon was that of Typhoon Haiyan at 314 km/h (195 mph) shortly before its landfall in the central Philippines on November 8, 2013. The most intense storm based on minimum pressure was Typhoon Tip in the northwestern Pacific Ocean in 1979, which reached a minimum pressure of 870 hectopascals (26 inHg) and maximum sustained wind speeds of 165 knots (85 m/s, 190 mph, 310 km/h). The deadliest typhoon of

3069-814: The 20th century was Typhoon Nina , which killed nearly 100,000 in China in 1975 due to a flood that caused 12 reservoirs to fail. After Typhoon Morakot landed in Taiwan at midnight on August 8, 2009, almost the entire southern region of Taiwan ( Chiayi County / Chiayi City , Tainan County / Tainan City (now merged as Tainan), Kaohsiung County / Kaohsiung City (now merged as Kaohsiung), and Pingtung County ) and parts of Taitung County and Nantou County were flooded by record-breaking heavy rain. The rainfall in Pingtung County reached 2,327 millimeters (91.6 in), breaking all rainfall records of any single place in Taiwan induced by

3162-411: The 500 hPa level, the air temperature averages −7 °C (18 °F) within the tropics, but air in the tropics is normally dry at this height, giving the air room to wet-bulb , or cool as it moistens, to a more favorable temperature that can then support convection. A wet-bulb temperature at 500 hPa in a tropical atmosphere of −13.2 °C (8.2 °F) is required to initiate convection if

3255-599: The Ancient Greek mythological creature Typhôn . In French typhon was attested as storm in 1504. Portuguese traveler Fernão Mendes Pinto referred to a tufão in his memoir published in 1614. The earliest form in English was "touffon" (1588), later as touffon, tuffon, tufon, tuffin, tuffoon, tayfun, tiffoon, typhawn. A tropical depression is the lowest category that the Japan Meteorological Agency uses and

3348-453: The English word typhoon traced to the Cantonese pronunciation of 颱風 [tʰɔi fuŋ] (correspond to Mandarin [tʰaɪ fɤŋ] ), in turn the Cantonese word traced to Arabic. This claim contradicts the fact that the Cantonese term for typhoon was 風舊 [fuŋ kɐu] before the national promotion of 颱風 . 風舊 (meaning "winds which long last") was first attested in 280, being

3441-561: The Joint Typhoon Warning Center. The etymology of typhoon is either Chinese or Persian-Hindustani origin. Typhoon may trace to 風癡 (meaning "winds which long last"), first attested in 1124 in China. It was pronounced as [hɔŋ tsʰi] in Min Chinese at the time, but later evolved to [hɔŋ tʰai]. New characters 風颱 were created to match the sound, no later than 1566. The word was introduced to Mandarin Chinese in

3534-544: The Magnificent ). Pinto then joined a Portuguese reconnaissance mission to the Red Sea via Ethiopia. The mission was to deliver a message to Portuguese soldiers guarding the mother of " Prester John " (Emperor Dawit II of Ethiopia ) in a mountain fortress. After leaving Massawa , the mission engaged three Turkish galleys in battle. The Portuguese ships were defeated and their crews taken to Mocha to be sold as slaves. Pinto

3627-530: The Philippines, the most active season since 1945 for tropical cyclone strikes was 1993 , when nineteen tropical cyclones moved through the country. There was only one tropical cyclone that moved through the Philippines in 1958 . The 2004 Pacific typhoon season was the busiest for Okinawa since 1957. Within Guangdong in southern China, during the past thousand years, the most active decades for typhoon strikes were

3720-506: The Portuguese king's special magistrate for Indian affairs. Soon after being freed, Pinto sailed on a Portuguese cargo ship to Goa . Against his will, Pinto was transferred en route to a naval fleet bound for the Mughal port city of Debal (modern Karachi ) near Thatta . After enduring battles with Ottoman ships , Pinto reached Goa. From 1539, Pinto remained in Malacca under Pedro de Faria ,

3813-578: The United States who have territories directly affected by typhoons. The submitted names are arranged into a list, the names on the list will be used from up to down, from left to right. When all names on the list are used, it will start again from the left-top corner. When a typhoon causes damage in a region, the affected region can request for retiring the name in the next session of the ESCAP/WMO Typhoon Committee. A new name will be decided by

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3906-690: The behavior of the Earth's atmosphere above, so their initialization into atmospheric models is important. While sea surface temperature is important for tropical cyclogenesis , it is also important in determining the formation of sea fog and sea breezes. Heat from underlying warmer waters can significantly modify an air mass over distances as short as 35 kilometres (22 mi) to 40 kilometres (25 mi). For example, southwest of Northern Hemisphere extratropical cyclones , curved cyclonic flow bringing cold air across relatively warm water bodies can lead to narrow lake-effect snow (or sea effect) bands. Those bands bring strong localized precipitation , often in

3999-408: The boy's prospects, an uncle took him to Lisbon . There, Pinto was employed in the household service of a noblewoman. After eighteen months or so, Pinto fled. At the docks, he was hired as a ship's boy on a cargo vessel bound for Setúbal . On the way, French pirates captured the ship and the passengers were set upon the shore at Alentejo . Pinto eventually made his way to Setúbal, where he entered

4092-479: The date line from the central Pacific retain their original name, but the designation of hurricane becomes typhoon. The most active Western Pacific typhoon season was in 1964 , when 39 storms of tropical storm strength formed. Only 15 seasons had 30 or more storms developing since reliable records began. The least activity seen in the northwest Pacific Ocean was during the 2010 Pacific typhoon season , when only 14 tropical storms and seven typhoons formed. In

4185-539: The education of contemporary authors and did not reveal a knowledge of either classical culture nor aesthetics of the Renaissance , his experiential knowledge and intelligence enabled him to create a meaningful work. Pinto was critical of Portuguese colonialism in the Far East. The vivid tales of his wanderings were so incredible and far-fetched as to not be believed. They gave rise to the saying "Fernão, Mentes? Minto!",

4278-453: The form of snow , since large water bodies such as lakes efficiently store heat that results in significant temperature differences—larger than 13 °C (23 °F)—between the water surface and the air above. Because of this temperature difference, warmth and moisture are transported upward, condensing into vertically oriented clouds which produce snow showers. The temperature decrease with height and cloud depth are directly affected by both

4371-571: The greatest rates of warming in the tropical Indian Ocean, western Pacific Ocean, and western boundary currents of the subtropical gyres . However, the eastern Pacific Ocean, subtropical North Atlantic Ocean, and Southern Ocean have warmed more slowly than the global average or have experienced cooling since the 1950s. Ocean currents , such as the Atlantic Multidecadal Oscillation , can affect sea surface temperatures over several decades. The Atlantic Multidecadal Oscillation (AMO)

4464-497: The immediate sea surface, general temperature measurements are accompanied by a reference to the specific depth of measurement. This is because of significant differences encountered between measurements made at different depths, especially during the daytime when low wind speed and high sunshine conditions may lead to the formation of a warm layer at the ocean's surface and strong vertical temperature gradients (a diurnal thermocline ). Sea surface temperature measurements are confined to

4557-691: The impact of the Asian civilizations on the Europeans and is a reasonable analysis of Portuguese action in the Orient (in comparison to Luís de Camões ' Os Lusíadas ). The most controversial of Pinto's claims is his being the first European to visit Japan and his introduction of the arquebus to Japan. Another controversial claim, that he fought in Java against the Muslims, has been analyzed by historians. The Dutch historian, P. A. Tiele , who wrote in 1880, did not believe Pinto

4650-565: The inverted Mandarin order 颱風 [tʰaɪ fɤŋ] , later picked up by foreign sailors to appear as typhoon. The usage of 颱風 was not dominant until Chu Coching , the head of meteorology of the national academy from 1929 to 1936, declared it to be the standard term. There were 29 alternative terms for typhoon recorded in a chronicle in 1762, now mostly replaced by 颱風 , although 風癡 or 風颱 continues to be used in Min Chinese - and Wu Chinese - speaking areas from Chaozhou , Guangdong to Taizhou , Zhejiang. Some English linguists proposed

4743-404: The last 130 years due to the way they were taken. In the nineteenth century, measurements were taken in a bucket off a ship. However, there was a slight variation in temperature because of the differences in buckets. Samples were collected in either a wood or an uninsulated canvas bucket, but the canvas bucket cooled quicker than the wood bucket. The sudden change in temperature between 1940 and 1941

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4836-433: The lower to middle levels of the troposphere , enough Coriolis force to develop a low pressure center, a pre-existing low level focus or disturbance, and low vertical wind shear. While these conditions are necessary for tropical cyclone formation, they do not guarantee that a tropical cyclone will form. Normally, an ocean temperature of 26.5 °C (79.7 °F) spanning through a depth of at least 50 metres (160 ft)

4929-520: The maximum sustained wind speed measurements that the JTWC uses are based on a 1-minute averaging period, akin to the U.S.'s National Hurricane Center and Central Pacific Hurricane Center . As a result, the JTWC's wind reports are higher than JMA's measurements, as the latter is based on a 10-minute averaging interval. There are six main requirements for tropical cyclogenesis: sufficiently warm sea surface temperatures, atmospheric instability, high humidity in

5022-432: The mid-levels of the troposphere , roughly at the 500 hPa level, is normally a requirement for development. However, when dry air is found at the same height, temperatures at 500 hPa need to be even colder as dry atmospheres require a greater lapse rate for instability than moist atmospheres. At heights near the tropopause , the 30-year average temperature (as measured in the period encompassing 1961 through 1990)

5115-510: The most active on Earth. Pacific typhoons have formed year-round, with peak months from August to October. The peak months correspond to that of the Atlantic hurricane seasons . Along with a high storm frequency, this basin also features the most globally intense storms on record. One of the most recent busy seasons was 2013 . Tropical cyclones form in any month of the year across the northwest Pacific Ocean and concentrate around June and November in

5208-683: The newly appointed captain of Malacca. Pinto was sent to establish diplomatic contacts, particularly with small kingdoms allied with the Portuguese against the Muslims of northern Sumatra. In 1569, he discovered an Ottoman fleet led by Kurtoğlu Hızır Reis in Aceh . Following Pinto's mission to Sumatra, he was sent to Patani , on the eastern shore of the Malay Peninsula . From there, Pinto made an unsuccessful delivery of merchandise to Siam . The goods were stolen by pirates who were then chased by Pinto and António de Faria . Pinto continued trading operations in

5301-557: The northern Indian Ocean. The area just northeast of the Philippines is the most active place on Earth for tropical cyclones to exist. Across the Philippines themselves, activity reaches a minimum in February, before increasing steadily through June and spiking from July through October, with September being the most active month for tropical cyclones across the archipelago . Activity falls off significantly in November, although Typhoon Haiyan ,

5394-440: The ocean , approximately the top 0.01 mm or less, which may not represent the bulk temperature of the upper meter of ocean due primarily to effects of solar surface heating during the daytime, reflected radiation, as well as sensible heat loss and surface evaporation. All these factors make it somewhat difficult to compare satellite data to measurements from buoys or shipboard methods, complicating ground truth efforts. Secondly,

5487-471: The ocean surface and the tropopause is required for tropical cyclone development. Typically with Pacific typhoons, there are two jets of outflow : one to the north ahead of an upper trough in the westerlies , and a second towards the equator. In general, the westerly wind increases associated with the Madden–Julian oscillation lead to increased tropical cyclogenesis in all tropical cyclone basins . As

5580-539: The oldest Chinese term for typhoon. Not one Chinese historical record links 颱風 to an Arabic or foreign origin. On the other hand, Chinese records consistently assert foreigners refer typhoon as "black wind". "Black wind" eventually enters the vocabulary of Jin Chinese as 黑老風 [xəʔ lo fəŋ] . Alternatively, some dictionaries propose that typhoon derived from (طوفان) tūfān , meaning storm in Persian and Hindustani . The root of (طوفان) tūfān possibly traces to

5673-417: The oscillation propagates from west to east, it leads to an eastward march in tropical cyclogenesis with time during that hemisphere's summer season. On average, twice per year twin tropical cyclones will form in the western Pacific Ocean, near the 5th parallel north and the 5th parallel south , along the same meridian, or line of longitude. There is an inverse relationship between tropical cyclone activity in

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5766-554: The region of the Red Sea , from the coast of Africa to the Persian Gulf ; and thirdly, from east India to Sumatra , Siam , China, and Japan. Finally, Pinto returned to Europe. On 11 March 1537, Pinto left Lisbon for India via Portuguese Mozambique . On 5 September that year, he arrived in Diu , a fortified island and town northwest of Bombay (Portuguese since 1535 but under siege by Suleiman

5859-432: The region whose name was retired. Unlike tropical cyclones in other parts of the world, typhoons are not named after people. Instead, they generally refer to animals, flowers, astrological signs, and a few personal names. However, Philippines (PAGASA) retains its own naming list, which consists of both human names and other objects. Japan and some other East Asian countries also assign numbers to typhoons. Storms that cross

5952-583: The responsibility for issuing warnings for land areas about tropical cyclones affecting their country, such as the Joint Typhoon Warning Center for United States agencies, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) for interests in the island archipelago nation, and the Hong Kong Observatory for storms that come close enough to cause the issuance of warning signals . The list of names consists of entries from 14 southeast and east Asian nations and regions and

6045-420: The satellite cannot look through clouds, creating a cool bias in satellite-derived SSTs within cloudy areas. However, passive microwave techniques can accurately measure SST and penetrate cloud cover. Within atmospheric sounder channels on weather satellites , which peak just above the ocean's surface, knowledge of the sea surface temperature is important to their calibration. Sea surface temperature affects

6138-455: The sea surface temperature and circulation features following a near-10-year frequency. Most tropical cyclones form on the side of the subtropical ridge closer to the equator, then move poleward past the ridge axis before recurving north and northeast into the main belt of the westerlies . Most typhoons form in a region in the northwest Pacific known as typhoon alley, where the planet's most powerful tropical cyclones most frequently develop. When

6231-637: The service of Francisco de Faria , a knight of Santiago. He remained there for four years and then joined the service of Jorge de Lencastre , a master of the Order of Santiago and an illegitimate son of King John II of Portugal . Pinto held that position for a number of years. Although comfortable, it held no promise of advancement. Therefore, at twenty-eight, Pinto left to join the Portuguese India Armadas . Pinto's travels can be divided into three phases: firstly, from Portugal to India; secondly, through

6324-594: The southernmost part of modern-day Cambodia and Vietnam . Pinto describes his encounter with a "pope-like" man, possibly the Dalai Lama , who had never heard of Europe. Pinto and two companions jumped ship to a Chinese pirate junk and were shipwrecked onto the Japanese island of Tanegashima , south of Kyūshū . Pinto claimed that his 1543 landing made him the first European to set foot in Japan. He also claimed to have introduced

6417-569: The strongest Philippine typhoon on record, was a November typhoon. The most frequently impacted areas of the Philippines by tropical cyclones are northern and central Luzon and eastern Visayas . A ten-year average of satellite determined precipitation showed that at least 30 percent of the annual rainfall in the northern Philippines could be traced to tropical cyclones, while the southern islands receive less than 10 percent of their annual rainfall from tropical cyclones. The genesis and intensity of typhoons are also modulated by slow variation of

6510-511: The subpolar North Atlantic, the equatorial Pacific, and the Southern Ocean. The future global mean SST increase for the period 1995-2014 to 2081-2100 is 0.86°C under the most modest greenhouse gas emissions scenarios, and up to 2.89°C under the most severe emissions scenarios. There are a variety of techniques for measuring this parameter that can potentially yield different results because different things are actually being measured. Away from

6603-561: The subtropical ridge position, shift westward across the western Pacific Ocean, which increases the landfall threat to China and greater intensity to Philippines . Those that form near the Marshall Islands find their way to Jeju Island , Korea. Typhoon paths follow three general directions. A rare few storms, like Hurricane John , were redesignated as typhoons as they originated in the Eastern/Central Pacific and moved into

6696-423: The subtropical ridge shifts due to El Niño , so will the preferred tropical cyclone tracks. Areas west of Japan and Korea tend to experience many fewer September–November tropical cyclone impacts during El Niño and neutral years. During El Niño years, the break in the subtropical ridge tends to lie near 130°E , which would favor the Japanese archipelago. During La Niña years, the formation of tropical cyclones, and

6789-424: The surface layer denser and it mixes to great depth and then stratifies again in summer. This is why there is no simple single depth for ocean surface . The photic depth of the ocean is typically about 100 m and is related to this heated surface layer. It can be up to around 200 m deep in the open ocean . The sea surface temperature (SST) has a diurnal range , just like the Earth's atmosphere above, though to

6882-681: The surface temperature signature due to tropical cyclones . In general, an SST cooling is observed after the passing of a hurricane, primarily as the result of mixed layer deepening and surface heat losses. In the wake of several day long Saharan dust outbreaks across the adjacent northern Atlantic Ocean, sea surface temperatures are reduced 0.2 C to 0.4 C (0.3 to 0.7 F). Other sources of short-term SST fluctuation include extratropical cyclones , rapid influxes of glacial fresh water and concentrated phytoplankton blooms due to seasonal cycles or agricultural run-off. The tropical ocean has been warming faster than other regions since 1950, with

6975-580: The swampy Java shore. Pinto was bought by a Celebes merchant and resold to the King of Kalapa who returned him to Sunda . Using borrowed money, Pinto bought passage to Siam where he encountered the King of Siam at war . Pinto's writings contribute to the historical record of the war. On 22 September 1558, Pinto returned to Portugal. Fame preceded him in Western Europe due to one of his letters being published by

7068-516: The time Pinto was completing his autobiography. Between 1554 and 1556, Pinto returned to Japan with Xavier's successor. He became the Viceroy of Portuguese India's ambassador to the daimyo of Bungo on the island of Kyūshū. Despite Pinto's support of the Church in Japan, he left the Jesuits in 1557. Pinto returned to Malacca and was then sent to Martaban . He arrived in the midst of a siege and took refuge in

7161-523: The top portion of the ocean, known as the near-surface layer. The sea surface temperature was one of the first oceanographic variables to be measured. Benjamin Franklin suspended a mercury thermometer from a ship while travelling between the United States and Europe in his survey of the Gulf Stream in the late eighteenth century. SST was later measured by dipping a thermometer into a bucket of water that

7254-498: The warm waters near the surface offshore, and replace them with cooler water from below in the process known as Ekman transport . This pattern generally increases nutrients for marine life in the region, and can have a profound effect in some regions where the bottom waters are particularly nutrient-rich. Offshore of river deltas , freshwater flows over the top of the denser seawater, which allows it to heat faster due to limited vertical mixing. Remotely sensed SST can be used to detect

7347-416: The water temperature and the large-scale environment. The stronger the temperature decrease with height, the taller the clouds get, and the greater the precipitation rate becomes. Ocean temperature of at least 26.5 °C (79.7 °F ) spanning through at minimum a 50- metre depth is one of the precursors needed to maintain a tropical cyclone (a type of mesocyclone ). These warm waters are needed to maintain

7440-405: The water temperature is 26.5 °C (79.7 °F), and this temperature requirement increases or decreases proportionally by 1 °C in the sea surface temperature for each 1 °C change at 500 hpa. Inside a cold cyclone , 500 hPa temperatures can fall as low as −30 °C (−22 °F), which can initiate convection even in the driest atmospheres. This also explains why moisture in

7533-476: The western Pacific Ocean. El Niño is defined by prolonged differences in Pacific Ocean surface temperatures when compared with the average value. The accepted definition is a warming or cooling of at least 0.5 °C (0.9 °F) averaged over the east-central tropical Pacific Ocean. Typically, this anomaly happens at irregular intervals of 2–7 years and lasts nine months to two years. The average period length

7626-707: The western Pacific and rainfall in the normally dry eastern Pacific. El Niño's warm rush of nutrient-poor tropical water, heated by its eastward passage in the Equatorial Current, replaces the cold, nutrient-rich surface water of the Humboldt Current . When El Niño conditions last for many months, extensive ocean warming and the reduction in Easterly Trade winds limits upwelling of cold nutrient-rich deep water and its economic impact to local fishing for an international market can be serious. Among scientists, there

7719-524: The western Pacific basin and the North Atlantic basin, however. When one basin is active, the other is normally quiet, and vice versa. The main reason for this appears to be the phase of the Madden–Julian oscillation, or MJO, which is normally in opposite modes between the two basins at any given time. Nearly one-third of the world's tropical cyclones form within the western Pacific. This makes this basin

7812-460: The western Pacific. Within the Western Pacific, RSMC Tokyo-Typhoon Center , part of the Japan Meteorological Agency , has had the official warning responsibility for the whole of the Western Pacific since 1989, and the naming responsibility for systems of tropical storm strength or greater since 2000. However each National Meteorological and Hydrological Service within the western Pacific has

7905-583: The wettest known typhoon on record for the northwest Pacific tropical cyclone basins . However, Vietnam recognises its typhoon season as lasting from the beginning of June through to the end of November, with an average of four to six typhoons hitting the country annually. According to the statistics of the Joint Typhoon Warning Center, from 1950 to 2022, the Northwest Pacific generated an average of 26.5 named tropical cyclones each year, of which an average of 16.6 reached typhoon standard or above as defined by

7998-463: The work can be verified, particularly through records of Pinto's service to the Portuguese crown and by his association with Jesuit missionaries. Pinto was born in about 1509, in Montemor-o-Velho , Portugal , to a poor rural family or perhaps to a family of minor nobility who had fallen on hard times. Pinto had two brothers and two sisters (and possibly other siblings). In 1551, a brother, Álvaro,

8091-534: Was a Portuguese explorer and writer. His voyages are recorded in Pilgrimage ( Portuguese : Peregrinação ), his autobiographical memoir, which was published posthumously in 1614. The historical accuracy of the work is debatable due to the many events that seem far-fetched or at least exaggerated, earning him the nickname Fernão Mentes Minto (wordplay with the Portuguese verb mentir , 'to lie', meaning "Fernão, are you lying? I am lying."). Still, many aspects of

8184-459: Was manually drawn from the sea surface. The first automated technique for determining SST was accomplished by measuring the temperature of water in the intake port of large ships, which was underway by 1963. These observations have a warm bias of around 0.6 °C (1 °F) due to the heat of the engine room. Fixed weather buoys measure the water temperature at a depth of 3 metres (9.8 ft). Measurements of SST have had inconsistencies over

8277-400: Was present during the campaign, but rather that he wrote his information from secondhand sources. Even so, Tiele admits Pinto's account cannot be disregarded because of the lack of alternative information about Javanese history during the time. Maurice Collis holds the opinion that Pinto's accounts, while not entirely true, remain compatible with historical events. Collis considers Pinto's work

8370-825: Was recorded in Portuguese Malacca . Letters also record that a brother died a martyr in Malacca. In 1557, Francisco Garcia de Vargas , Pinto's wealthy cousin, is recorded at Cochin . He was related to the wealthy Mendes family, who were descendants of Jewish Marranos who lived in Portugal (which makes him a relative of the Jewish philanthropist Gracia Mendes Nasi ). They had a monopoly on black pepper commerce in Portugal and some of them later moved to Antwerp in Belgium . Pinto described his childhood as spartan. In 1521, hoping to improve

8463-472: Was sold to a Greek Muslim who was a cruel master. Pinto threatened suicide and was sold to a Jewish merchant for about thirty ducats ' worth of dates . With the Jewish merchant, Pinto travelled the caravan route to Hormuz , a leading market town in the Persian Gulf . There, Pinto was freed by way of payment of three hundred ducats from the Portuguese crown. He was made captain of the Fortress of Hormuz and

8556-475: Was the result of an undocumented change in procedure. The samples were taken near the engine intake because it was too dangerous to use lights to take measurements over the side of the ship at night. Many different drifting buoys exist around the world that vary in design, and the location of reliable temperature sensors varies. These measurements are beamed to satellites for automated and immediate data distribution. A large network of coastal buoys in U.S. waters

8649-540: Was −77 °C (−132 °F). One example of a tropical cyclone maintaining itself over cooler waters was Epsilon late in the 2005 Atlantic hurricane season . [REDACTED]  This article incorporates public domain material from websites or documents of the National Oceanic and Atmospheric Administration . Fern%C3%A3o Mendes Pinto Fernão Mendes Pinto ( Portuguese pronunciation: [fɨɾˈnɐ̃w ˈmẽdɨʃ ˈpĩtu] ; c. 1509 – 8 July 1583)

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