La Nina refers to the eastern and central equatorial Pacific sea surface temperatures continue to cool the abnormal phenomenon (El Niño and the opposite). Meteorological and oceanographic communities use a new term. Meaning "little girl", coinciding with the meaning "El Nino" El Nino contrary, also known as "anti-El Nino" or "cold event." El Nino and La Nina is the central and eastern equatorial Pacific sea surface temperature anomalies show alternating warm and cold, warm and cold sea surface temperature changes of this process constitutes a cycle, then after the occurrence of El Nino La Nina is not rare things. The same would then occur after the La Nina El Nino. But look at the record since 1950, higher than the frequency of El Nino La Nina. La Nina phenomenon in the current context of global warming, slow the frequency, intensity tends to become weaker. Especially in the 1990s, from 1991 to 1995, had a spate of three El Nino, La Nina, but the middle did not happen.
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La Nina (la niña) Interpretation
La Nina is Spanish "la niña" (note not a la nina) - "the little girl, Joan," the meaning is the reverse of El Nino, the eastern Pacific equatorial temperature anomaly near the drop of a phenomenon, showing eastern Pacific was cold, but also with the global climate chaos, always appear after the El Niño phenomenon. Meteorology and oceanography to refer specifically to home in eastern and central equatorial Pacific continued a wide range of unusual cold water phenomenon (sea surface temperature is 0.5 ℃ lower than the average climate, and continued for more than 6 months). La Nina, also known as anti-El Nino. El Nino and La Nina is the central and eastern equatorial Pacific sea surface temperature anomalies show alternating warm and cold, warm and cold sea surface temperature changes of this process constitutes a cycle, then after the occurrence of El Nino La Nina is not rare things. The same would then occur after the La Nina El Nino. But look at the record since 1950, higher than the frequency of El Nino La Nina. La Nina phenomenon in the current context of global warming, slow the frequency, intensity tends to become weaker. Especially in the 1990s, from 1991 to 1995, had a spate of three El Nino, La Nina, but the middle did not happen. La Niña generally will come with the El Niño, El Niño phenomenon in the second year, La Nina phenomenon will appear, and sometimes La Nina phenomenon will last two to three years. 1988 to 1989, 1998 and 2001 have undergone a strong La Nina phenomenon, so central to eastern Pacific sea temperatures lower than normal by 1 to 2 ℃, 1995 and 1996 occurred in La Nina phenomenon is weak. Some scientists believe that global warming trend, the trend of a weakening La Nina.
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Performance
Most recent La Nina phenomenon in 1998, continued to tend to the end of the spring of 2000. El Nino and La Nina phenomenon usually alternating, roughly opposite effects on climate through ocean-atmosphere energy exchange, atmospheric circulation changes affect climate change. From nearly 50 years of monitoring data to see the frequency of El Niño than La Niña, the intensity is greater than the La Nina. Often occurs in El Nino La Nina after, but not always the case. El Nino and La Nina takes about four years between the time change. Chinese marine scientists believe that China suffered in 1998, catastrophic floods, is "El Nino - La Nina phenomenon" and the Yangtze River ecological deterioration caused by two common causes. Chinese oceanographers and meteorologists noted that last year in the tropical Pacific El Niño phenomenon (ocean warming) has been a month into a La Niña (cold water). This unprecedented rainfall in the Yangtze River is one of the reasons surge. The El Nino climate that is very unusual in China, in June 1998 to July, south, southern rains frequently, the Yangtze River basin, basin lakes are severe floods, some of the rivers water level above the warning level for a long time, parts of Guangdong and Guangxi and Yunnan also above normal rainfall over half, north and northeast China also floods in some areas the situation. La Nina also cause abnormal weather. Chinese Academy of Sciences Research Center, National Marine Environmental Forecasting honorary director Chao said that the present situation is: El Niño's impact has not completely disappeared, while La Nina's influence began, which the Chinese state is complicated by the climate. In general, caused by the El Nino warm air to move to large-scale Northern Hemisphere higher latitudes, the cold air north face, warm and cold exchange, the formation of rainfall increased. But after June, the arrival of summer rain belt north, the Yangtze River flood season should end. But when La Nina occurs, the cold air sinking south, has moved northward flow of warm and wet on the back to fill the vacuum. In fact, the subtropical high in the July 10 date to 30 degrees north latitude, suddenly retreated south latitude 18 degrees, a phenomenon never seen in history. "La Nina" It is a correction of El Niño years after the transition phenomenon. Hydrological characteristics of the eastern Pacific that will allow the water temperature down, drought, and in contrast to the western water temperature increases, precipitation was above normal than normal. Scientists believe that: "La Nina" climate of this hydrological phenomenon on the world will not have a significant impact, but will give Guangdong, Fujian, Zhejiang and the whole southeast coast and persist for some time to bring more rain. El Nino, La Nina away from the tropical Recently, the U.S. National Aeronautics and Space Administration said that in the past three years, caused by El Nino and La Nina weather anomaly. They will no longer affect the tropics, but other regions will be affected. Atlantic and Pacific tropical temperatures and water levels have returned to normal levels. The central Pacific sea level higher than the normal 14 to 32 cm, and the Bering Sea and Gulf of Alaska's water level was lower than the normal 5 to 13 cm. Bureau Jet Propulsion Laboratory oceanographer Weilian Pa policy Stewart said the current calm situation began three months before the passage of the La Nina. He believes that the global climate system has been restored to the state three years ago. "La Nina" is on the decline The following were published in 2007, but the facts have overturned this theory, from early 2008 snowstorm in the South can be seen, La Nina has not disappeared. --- 2008.01 Franco-American countries, "Poseidon" satellites back to the latest marine observational data indicate that affect the Pacific over the past two years, "La Nina" phenomenon has been significantly reduced, the world's oceans will restore past "quiet." "La Nina" literally means "girl", which refers to the equatorial eastern Pacific near the abnormal temperature changes in a phenomenon. "La Nina" by "El Niño" phenomenon caused by a large cold area in the eastern Pacific surface formed, because of its features with the "El Nino" phenomenon contrary, also known as the "anti-El Niño" phenomenon. "La Nina" phenomenon is a sign of hurricanes, heavy rains and cold, with "El Nino" phenomenon of global climate will have serious abnormalities. According to French experts, "La Nina" generally appear in the "El Nino", the general, two phenomena of the last year or so. However, in 1998 began the "La Nina" phenomenon has lasted two years, until this year (2007) 6 months before they began to weaken. They said that the current study can not explain the "La Nina" phenomenon and its emergence before the "El Nino" phenomenon why unusually strong, can not explain what causes the "La Nina" phenomenon duration longer than in the past year . Researchers last year twice in January and June observed, "La Nina" phenomenon weakening signs, but the later results show, these are just false. In a little breathing space, the "La Nina" coming back. French experts stressed that the satellite back to the latest data show that "La Nina" phenomenon has indeed been significantly reduced, "the girl" this time is really old.
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Source
So, what is the formation of La Nina? El Nino and the central and eastern equatorial Pacific sea surface temperature warming, linked to the weakening of trade winds, while La Nina is with the central and eastern equatorial Pacific sea temperature cooling, enhanced trade winds associated. So, actually La Nina is the combined effect of the tropical ocean and atmosphere the product. Trade winds, the lower atmosphere is blowing from the tropics to the equatorial regions of MORALS, in the northern hemisphere known as the "northeast trade winds," the southern hemisphere known as the "southeast trade winds," A long time ago to live in South America, Spanish take advantage of this constant easterly voyage to Southeast Asia to carry out business activities. Therefore, the trade winds, also known as trade winds. Mainly affected by the movement of ocean surface wind to contain the sea surface. Makes the existence of a large number of warm trade winds were blowing to the western equatorial Pacific, eastern equatorial Pacific warm water is blown away, mainly by the cold water below the surface to supplement the eastern equatorial Pacific sea surface temperature is significantly lower than in the western Pacific. When the trade winds strengthen, the equatorial eastern Pacific deep sea water turned on the phenomenon of more severe, leading to low sea surface temperature anomalies, making the air sinking in the eastern equatorial Pacific, and air movement in the West exacerbated the rise, will help to strengthen the trade winds This is further exacerbated by the development of the eastern equatorial Pacific cold water, triggering the so-called La Nina phenomenon. La Nina also affect the climate. La Nina and El Nino character contrary, with the disappearance of El Nino, La Nina's arrival, many parts of the world's weather and climate disasters will also change. Overall, La Nina is not a very mild temperament, it may bring disaster to many parts of the world, its climate and El Nino generally the opposite, but its intensity and impact than El Niño. In January 2007, La Nina affect the north, so that a large area of sea ice phenomenon.
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La Nina's influence on our climate
The following refers to the year in 2007 In the first half on behalf of the country showing a variety of climate trends, climate experts in research and analysis, preliminary view that the La Nina weather phenomenon is the impact of the first half of the main reasons. National Climate Center researcher Zhao Z that this year, under the influence of the La Nina phenomenon, the eastern equatorial Pacific Ocean water temperature is low, the meridional circulation anomalies in East Asia, resulting in spring in northern China since the prevalence of northerly, and south-east of warm air is relatively weak. Thus, a strong cold north winds frequent, but less than normal rainfall has continued, the temperature is high. According to statistics, weather, frequent sandstorms in northern spring, 3 to April, a total of 12 large-scale emergence of blowing sand and dust storms, affected areas include the northwest, north, northeast of the west, the Huang-Huai region, and even spread to the Huaihe region, the Northwest in May region has appeared three times the regional or local dust storms, the high frequency, scope, for the same period in the past 50 years is rare. Climate experts said Chen Yu, Northwest nearly 50 years of dust event frequency showed a rising trend. Lu, Senior Engineer, National Climate Center, said all day, from AD 300 years, there have been five of China's total frequency of dust event period, each cycle lasts 90 years, nearly 10 years of dust events and trends showing a marked increase. Dust storms occur about the reasons, Chen Yu believes that the formation and size of dust storms on the environment and climate are two Gang Su, from an environmental perspective, the increasingly serious problem of desertification can not be ignored. But "no smoke without fire", from the climate perspective, this northern region since the beginning of February, the temperature rose rapidly, the high rate of 2 to 3 degrees Celsius, causing soil thaw ahead of time, large numbers of dry soil. At this time, the rainy season has not yet arrived, under the influence of the La Nina phenomenon, northern consecutive windy weather, the soil by the wind, then the formation of dust storms. Hot dry north, is also a hot topic people, March to May, the national average temperature over the same period reached the highest since 1961, particularly in northern areas the temperature remained high. From February, rainfall in most areas north of the Yangtze River continued below normal, the total precipitation for four consecutive months of less than 100 mm in the north and northwest regions less than 50 millimeters in the same period the year more than 5 percent below normal, especially 2 to 4 months, precipitation in the northern region is only 23 mm on average, at least since the founding. Coupled with dry heat, so that rapid decline in soil moisture in northern regions, forming the most serious since the 1990s drought. Zhao Z said, since 1992, except 1998, the other years 2 to April the north below the mean precipitation has been for many years, especially since last June, continued below normal precipitation in the northern region, the underlying soil moisture has been poor. At this time, under the influence of the La Nina phenomenon, the prevalence of northerly in northern China, and southeast of the warm air is relatively weak, coupled with warm and cold air with the negative, the shift, in the northern region have not been able to form an ideal rainfall conditions thus seen a continued dry weather, drought. When the drought in the north, south of the Yangtze River is frequent heavy rainfall in some areas. In this regard, land and all days that the south is the local heavy rain and strong convective weather with the results from large-scale river basins in terms of precipitation is normal. Lu were talking about our days in the overall climate characteristics and trends, said the trend from recent years to see global climate generally show the trend of diversity, mainly in the global context of climate warming, El Niño and La Niña alternation of the results. In this environment, our country can not become calm "Xanadu." He said the National Weather Service is closely watching the future atmospheric climate change, timely forecasts to minimize losses caused by disastrous weather.
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In 2008 the relationship between climate anomalies and La Nina
We are in a La Nina year, the state, that is, the eastern equatorial Pacific sea surface temperature lower than the 0.5 degrees below normal, and this phenomenon of China's climate is very obvious, under the influence of the La Nina phenomenon, caused by the East Asia to the circulation anomalies, such a situation is very conducive to circulation of cold air in northern China's south. It allows us to have a cold winter, so we can see, this year's cold winter appeared. Rani was only one reason, another reason for the formation of snow is as follows: Entered since 2008, the Asian high pressure is very active, constantly form a cold air mass south of the country, resulting in large-scale wind cool weather, but due to the South this year's warm air mass is also very active, a large number from the Pacific, Indian Ocean, the warm air frequently visited in the south, When the power comes from Mongolia, Siberia cold air mass rapidly south to the south, and after the encounter with the warm air mass, the cold, a warm combination of just two. Flow by the combined effect of these two, so the most recent period, especially in the Yangtze River more rain and snow, cold weather and long sustain. If only the strong cold air mass, while the warm air mass does not provide a large number of water vapor, the South will only be cool windy weather; warm air mass is only available if a large number of water vapor, but not cold air mass coming, then there is nothing severe weather. The two complete when the disaster will come up. Meanwhile, in China suffered a serious blow snow when the central United States, the dramatic emergence of 20 degrees Celsius temperature, storms come and go from time to time (2008.01); years without snow dump 10mm heavy snow in Central Asia, refresh does not snow in Baghdad 100 years of history (2007.12 ); Western Europe, 07 serious floods in summer, a huge loss of British and French (2007 summer), winter, even the Russian northern edge of the new low temperature region, once reached -50 degrees Celsius ... ... La Nina has not ended, the situation is still very serious ... ... La Nina - Where are you from? Last year, more than a year of "El Nino" phenomenon quickly disappears, "La Nina" then on stage. So what is La Nina? La Nina refers to the eastern and central equatorial Pacific sea surface temperature anomalies cool continuous phenomenon (El Niño and the opposite). Meteorological and oceanographic communities using a new term. Means "little girl", coinciding with the meaning "El Nino" and the opposite of El Nino, also known as "anti-El Nino" or "cold event." El Nino and La Nina is the central and eastern equatorial Pacific sea surface temperature anomalies show alternating warm and cold, warm and cold sea surface temperature changes of this process constitutes a cycle, then after the occurrence of El Nino La Nina is not rare things. The same would then occur after the La Nina El Nino. But look at the record since 1950, higher than the frequency of El Nino La Nina. La Nina phenomenon in the current context of global warming, slow the frequency, intensity tends to become weaker. Especially in the 1990s, from 1991 to 1995, had a spate of three El Nino, La Nina, but the middle did not happen. So, what is the formation of La Nina? El Nino and the central and eastern equatorial Pacific sea surface temperature warming, linked to the weakening of trade winds, while La Nina is with the central and eastern equatorial Pacific sea temperature cooling, enhanced trade winds associated. So, actually La Nina is the combined effect of the tropical ocean and atmosphere the product. Trade winds, is the low gas blowing from the tropics to the equatorial regions of MORALS, in the northern hemisphere known as the "northeast trade winds," the southern hemisphere known as the "southeast trade winds," A long time ago to live in South America, Spanish take advantage of this constant easterly voyage to Southeast Asia to carry out business activities. Therefore, the trade winds, also known as trade winds. Mainly affected by the movement of ocean surface wind to contain the sea surface. The existence of the trade winds were blowing to make a lot of warm equatorial western Pacific, eastern equatorial Pacific warm water is blown away, mainly by the cold water below the surface to supplement the eastern equatorial Pacific sea surface temperature is significantly lower than in the western Pacific. When the trade winds strengthen, the eastern equatorial Pacific deep-sea phenomenon is more intense on the turn, lead to low sea surface temperature anomalies, making the air in the eastern equatorial Pacific, sinking, and air movement in the West exacerbated the rise, will help to strengthen the trade winds This is further exacerbated by the development of the eastern equatorial Pacific cold water, triggering the so-called La Niña. La Nina also affect the climate. La Nina and El Nino character contrary, with the disappearance of El Nino, La Nina's arrival, much of the world's weather and climate disasters will also change. Overall, La Nina is not very gentle temperament, it could bring disaster to many parts of the world, its climate impact and roughly the opposite of El Nino, but its intensity and impact than El Niño. But human beings should reflect on why the 20th century there are so many frequent natural disasters
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La Nina to affect the spring and summer weather
By the equatorial Pacific Ocean La Nina events and the impact of the Eurasian atmospheric circulation anomalies, since January 10 this year, there have been four in south China's large-scale rarely seen in history snow and freezing weather. According to the National Climate Center's latest forecast, the La Nina event will continue until the summer of 2008, will bring to our spring and summer drought and forest fire danger rating high, dust storms in northern ones, appear in summer increase the risk of regional flooding, etc. meteorological disasters. La Nina is Spanish for "little girl" means, also known as anti-El Nino phenomenon, that occurred in eastern and central equatorial Pacific sea persistent abnormal cooling of large-scale phenomenon, the performance of low sea surface temperatures average 0.5 out of more than climate, and lasted more than 6 months. La Niña is a sign of hurricanes, heavy rains and cold, with El Niño are a serious cause of global climate anomalies. Reporters learned from the National Climate Center, history, 1954-1955, 1956-1957, 1963-1964, 1968-1969 winter, there have been very serious in China snow and extreme weather. National Climate Centre, a comprehensive analysis of climate change in these years after that, the naughty "little girl" will be this spring and summer climate impact of the following areas: Planting of rice in the South This year in southern China (Guangdong, Guangxi and Fujian most) in mid-February to early rice planting season in March weather, southern South China earlier than normal deviation; earlier than normal preference for the northern South China, only in the early mid-March 2 to 4 days cold rainy weather, little impact on rice planting, southern regional bias spring weather conditions. On the impact of the spring dust storms in northern Expected this spring, dust-prone areas in northern China dust weather days earlier than normal less than normal, but compared with the same period in 2007 there will be significantly increased; the emergence of strong storms likely. Eastern Inner Mongolia, northern Hebei dust weather days ones more likely. On the impact of drought and forest fire Spring drought in eastern China, mainly in dry, drought may occur in most areas east, where most of Jilin and Liaoning, eastern Inner Mongolia, north south, the Huang-Huai, Guangdong, Guangxi and northern drought may be more serious, should strengthen the drought; summer National drier than the wetter range scope, the overall flood situation in dry weight in the Yangtze River downstream to the north south high temperature and drought may occur. In addition, the spring in northern Heilongjiang, Jilin Liaoning most, southern Hunan and Jiangxi, Guangdong, Guangxi and northern high temperatures, rainfall, the forest forest fire danger rating is high. The summer floods of regional This summer, most of the major rain belt is located in Guangxi, Yunnan-Guizhou Plateau, Chongqing, western Hubei, southern Henan, Shandong, eastern, northern Hebei, Beijing and Tianjin, Jilin Liaoning most of these areas of flooding more likely. The impact of typhoon La Nina years, due to the warm western tropical Pacific sea surface temperature structure of the cold east, resulting in the western Pacific warm pool convective activity, likely resulting in above normal summer typhoon, typhoon and flood generating early summer typhoons may affect our more active, and contribute to a typhoon north activities. Source: Zhejiang Daily
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Outline
La Nina refers to the eastern and central equatorial Pacific sea surface temperature anomalies cool continuous phenomenon (El Niño and the opposite). Meteorological and oceanographic communities using a new term. Means "little girl", coinciding with the meaning "El Nino" and the opposite of El Nino, also known as "anti-El Nino" or "cold event." La Nina phenomenon is the abnormal cooling of Pacific waters in the eastern part of the case. Eastcom surface wind will be blowing the sun heat the water the western Pacific, resulting in higher sea level than in the east west nearly 60 cm, the western sea water temperature increased, the pressure drop, moist air to form the accumulation of typhoons and tropical storms, turn east on the sea bottom, causing East Pacific Ocean cooling. Atmospheric circulation over the Pacific Ocean called the Walker circulation, when the Walker circulation weakens, the water can not blow the west, the eastern Pacific warming, is the El Niño phenomenon; but especially strong Walker circulation, to produce La Nina the phenomenon. La Niña generally will come with the El Nino phenomenon, El Niño phenomenon in the second year, La Nina phenomenon will appear, sometimes La Nina phenomenon will last two to three years. 1988-1989, 1998-2001 have undergone a strong La Nina, 1995 to 1996 occurred in La Niña is weak, and some scientists believe, due to global warming, La Nina has weakened the trend.
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Meaning
La Nina is Spanish "La Niña" (note not the La Nina, because Baidu Baike not display correctly with a specific letter in Spanish, with a bend note n, so here's the original Spanish is not displayed correctly, but not the Spanish La Nina This is the reason for writing basic Spanish) - "Little girl, Joan," the meaning is the reverse of El Nino phenomenon, refers to the temperature of the eastern Pacific near the equator, a phenomenon unusual decline in the performance of the eastern Pacific was cold also associated with global climate chaos, always appear after the El Niño phenomenon. Meteorology and oceanography to refer specifically to home in eastern and central equatorial Pacific sea persistent abnormal cooling of large-scale phenomena (sea surface temperature is 0.5 ℃ lower than the average climate, and lasted longer than 6 months). La Nina, also known as anti-El Nino. El Nino and La Nina is the central and eastern equatorial Pacific sea surface temperature anomalies show alternating warm and cold, warm and cold sea surface temperature changes of this process constitutes a cycle, then after the occurrence of El Nino La Nina is not rare things. The same would then occur after the La Nina El Nino. But look at the record since 1950, higher than the frequency of El Nino La Nina. La Nina phenomenon in the current context of global warming, slow the frequency, intensity tends to become weaker. Especially in the 1990s, from 1991 to 1995, had a spate of three El Nino, La Nina, but the middle did not happen. La Niña generally will come with the El Nino phenomenon, El Niño phenomenon in the second year, La Nina phenomenon will appear, sometimes La Nina phenomenon will last two to three years. 1988 to 1989, 1998 and 2001 have undergone a strong La Nina phenomenon, so central to eastern Pacific sea surface temperatures lower than normal by 1 to 2 ℃, 1995 and 1996 occurred in La Niña is weak. Some scientists believe that due to global warming, La Nina has weakened the trend.
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Phenomenon
Most recent La Nina phenomenon in 1998, continued to tend to the end of the spring of 2000. El Nino and La Nina phenomenon usually alternating, roughly opposite effects on climate through ocean-atmosphere energy exchange, atmospheric circulation changes affect climate change. From nearly 50 years of monitoring data to see the frequency of El Niño than La Niña, the intensity is greater than the La Nina. Often occurs in El Nino La Nina after, but not always the case. El Nino and La Nina takes about four years between the time change. Chinese marine scientists believe that China suffered in 1998, catastrophic floods, is "El Nino - La Nina phenomenon" and the Yangtze River ecological deterioration caused by two common causes. Chinese oceanographers and meteorologists noted that last year in the tropical Pacific El Niño phenomenon (China near the ocean cooling) has been a month into a La Nina phenomenon (warming of waters near China). This unprecedented rainfall in the Yangtze River is one of the reasons surge. The El Nino climate that is very unusual in China, in June 1998 to July, south, southern rains frequently, the Yangtze River basin, basin lakes are severe floods, some of the rivers water level above the warning level for a long time, parts of Guangdong and Guangxi and Yunnan also above normal rainfall over half, north and northeast China also floods in some areas the situation. La Nina also cause abnormal weather. Chinese Academy of Sciences Research Center, National Marine Environmental Forecasting honorary director Chao said that the present situation is: El Niño's impact has not completely disappeared, while La Nina's influence began, which the Chinese state is complicated by the climate. In general, caused by the El Nino warm air to move to large-scale Northern Hemisphere higher latitudes, the cold air north face, warm and cold exchange, the formation of rainfall increased. But after June, the arrival of summer rain belt north, the Yangtze River flood season should end. But when La Nina occurs, the cold air sinking south, has moved northward flow of warm and wet on the back to fill the vacuum. In fact, the subtropical high in the July 10 date to 30 degrees north latitude, suddenly retreated south latitude 18 degrees, a phenomenon never seen in history. "La Nina" It is a correction of El Niño years after the transition phenomenon. Hydrological characteristics of the eastern Pacific that will allow the water temperature down, drought, and in contrast to the western water temperature increases, precipitation was above normal than normal. Scientists believe that: "La Nina" climate of this hydrological phenomenon on the world will not have a significant impact, but will give Guangdong, Fujian, Zhejiang and the whole southeast coast and persist for some time to bring more rain.
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Status quo
El Nino, La Nina away from the tropical In September 2000, the U.S. National Aeronautics and Space Administration said that in the past three years, caused by El Nino and La Nina weather anomaly. They will no longer affect the tropical regions, but other regions will also be affected. Atlantic and Pacific tropical temperatures and water levels have returned to normal levels. The central Pacific sea level higher than the normal 14 to 32 cm, and the Bering Sea and Gulf of Alaska's water level was lower than the normal 5 to 13 cm. Bureau Jet Propulsion Laboratory, said oceanographer Walter Wei Lianpa policy, the current calm situation began three months ago La Nina disappeared. He believes that the global climate system has been restored to the state three years ago. "La Nina" is on the decline The following were published in 2007, but the facts have overturned this theory, from early 2008 snowstorm in the South can be seen, La Nina has not disappeared. --- 2008.01 Franco-American countries, "Poseidon" back to the latest marine satellite observations show that the impact of the Pacific over the past two years, "La Nina" phenomenon has been significantly reduced, the world's oceans will return past the "quiet." "La Nina" literally means "girl", which refers to the equatorial eastern Pacific near the abnormal temperature changes in a phenomenon. "La Nina" by "El Niño" phenomenon caused by a large cold area in the eastern Pacific surface formed, because of its features with the "El Nino" phenomenon contrary, also known as the "anti-El Niño" phenomenon. "La Nina" phenomenon is a sign of hurricanes, heavy rains and cold, with "El Nino" phenomenon of global climate will have serious abnormalities. According to the French experts, "La Nina" generally appear in the "El Nino", the general, two phenomena of the last year or so. However, in 1998 began the "La Nina" phenomenon has lasted two years, until this year (2000) 6 months before they began to weaken. They said the current study can not explain the "La Nina" phenomenon and its emergence before the "El Nino" phenomenon why unusually strong, can not explain what causes the "La Nina" phenomenon than in the past to extend the duration of one year . The researchers last year in January and June, twice the observed "La Nina" phenomenon signs of weakening, but the later results show, these are just an illusion. In a little breathing space, the "La Nina" coming back. French experts stressed that the satellite sends back the latest data show, "La Nina" phenomenon has indeed been significantly weakened, "the girl" this time is really old.
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Causes
So, what is the formation of La Nina? El Nino and the central and eastern equatorial Pacific sea surface temperature warming, linked to the weakening of trade winds, while La Nina is with the central and eastern equatorial Pacific sea temperature cooling, enhanced trade winds associated. So, actually La Nina is a tropical ocean and atmosphere together product. Mainly affected by the movement of ocean surface wind to contain the sea surface. The existence of the trade winds were blowing to make a lot of warm equatorial western Pacific, eastern equatorial Pacific warm water is blown away, mainly by the cold water below the surface to supplement the eastern equatorial Pacific sea surface temperature is significantly lower than in the western Pacific. When the trade winds strengthen, the eastern equatorial Pacific deep-sea phenomenon is more intense on the turn, lead to low sea surface temperature anomalies, making the air in the eastern equatorial Pacific, sinking, and air movement in the West exacerbated the rise, will help to strengthen the trade winds This is further exacerbated by the development of the eastern equatorial Pacific cold water, triggering the so-called La Niña.
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2009 La Nina warning: China's provinces drought
A report on the drought emergency Anhui Provincial Meteorological Bureau on February 1 will be released on the eve of Spring Festival, drought early warning signal changed to orange red warning signal. Prior to January 29, Henan province, has released the first dry red alert. According to the National Climate Centre, the experts, the red warning signal to the highest level of drought early warning, represents the next week a comprehensive meteorological drought index reached 50-years of special drought, or a county (district) more than 60% crops affected by drought. The orange warning signal, said next week comprehensive meteorological drought index reached 25 to 50-years of severe drought, or a county (district) more than 40% of crops affected by drought. In fact, as early as 2008, winter, drought had swept through most parts of China. Among them, southern Hebei, Henan, most, central and southern Shanxi, Shaanxi, central, western Shandong, Zhejiang, south-east, central Fujian and other places, there are severe meteorological drought. However, the National Climate Center, director of climate applications and services, senior singing told the "Financial" reporter, due to increased precipitation in late January, the current drought in southern China, the situation has eased; but most of northern China, the Huang-Huai, JAC , Jianghan and other major winter wheat growing areas in northern drought, still very serious. Information from the Meteorological Bureau of Henan Province showed that less than normal precipitation in southern Henan Province, Henan Province, north and central is almost no precipitation. In Anhui Province, from January 25 has been the main winter wheat producing areas have almost no precipitation. It is understood along the Huaihe River in Anhui Huaibei cumulative rainfall of only 21 mm, 52 mm less than normal than the same period the year, second only to 1974, for the same period of time youth since 1961. The Hebei, Shanxi, Henan, Beijing and other places rain precipitation was even close to or exceed historical extremes. In fact, the winter drought in northern China is not uncommon. Singing told the "Financial" correspondent in 1999, China had had any serious "drought." At that time, North China, the Huang-Huai and southern most areas of severe drought phenomenon. After three years, a succession of three dry northern China. Among them, the 2000 national drought-hit area is as high as 40.54 million hectares. Although still unable to accurately estimate trends in the further development of the drought, but singing frankly, it now appears, this will be a year of drought, the situation is more serious one. Currently, experts are still unable to determine the cause of the direct cause of the rain precipitation. "But what is certain is that this drought is not the normal fluctuations in the atmosphere, but atmospheric anomalies." Singing that. Chinese Academy of Agricultural Sciences and Climate Change Research Center, Lin Erda told the "Financial" reporter, from the background of global warming, climate change caused by extreme weather phenomena, especially in severe drought. He warned that in the past 20 years, the losses caused by drought in China accounted for 1.2% of the GDP, if you do not take timely response measures, then the agricultural losses caused by drought will not be overlooked. It is understood that the present estimates based on meteorological drought index, the national meteorological drought area of about 23.5 million hectares, especially in the north a serious impact on winter wheat production. Data show that as of January 19, Hebei, Shanxi, Anhui, Henan, Shandong, Shaanxi, Gansu provinces in seven drought-hit area of total winter wheat area has reached 1.04 million mu (about 6,933,300 hectares), of which 2428 mu of dry weight (about 1,618,700 ha). Second, a common feature of La Nina climate Our January 31, 2008 Summary and ice storms in southern China lessons that El Nino and La Nina is the strongest signal of global climate anomalies, floods in China in 1998 and in April 1997 on -1998 June 20, the strongest of the century El Nino events in June 1998 and August for two consecutive years - 2000 strong La Nina events. National Climate Center, director of climate applications and services, senior singing that in 1999, China had had any serious "drought." At that time, North China, the Huang-Huai and southern most areas of severe drought phenomenon. After three years, a succession of three dry northern China. Among them, the 2000 national drought-hit area is as high as 40.54 million hectares. Is the corresponding June 1998 August - 2000 continued the strong La Nina event two years (it was also _set_ at the 2001 La Niña years). Took place in August 2007 La Nina event, La Nina phenomenon in late 2008 early 2009 they began to increase. With the arrival of La Nina, China's dust storms, typhoons, droughts and floods will become strong, the Chinese media have a responsibility to the public understanding of climate change in the trend as early as possible, preventive preparations. El Nino is a global climate change "warm event" La Nina is a global climate change "cold event." Chinese media on the "warm event" to follow the trend reported for the "cold event" indifferent, any errors in this fair and impartial news. World Meteorological Organization says the La Nina phenomenon has led to the cold weather in Europe. Suffered a severe drought in northern China also closely related to La Nina, we have been given on January 10 disaster warning, do La Nina events in the disaster preparedness: droughts and uneven, cold damage, typhoons and storms, and biological hazards of concern . Third, the development trend of La Nina We pointed out in the October 28, July 30 - November 6 (109 days) for the Earth's rotation deceleration phase of the seasonal, is not conducive to the formation of El Nino events; November 18 - January 23 (66 days) for the Earth's seasonal rotation speed stage, the seasonal El Niño cause. So, from August to October this year, the slow progress of El Niño adverse weather and seasonal factors impede the related factors that compete with each other, unusual seasonal factors determine the direction of change. This means that the rapid progress of El Niño will occur in November 18, 2008 - January 23 (66 days) of the Earth's rotation accelerated phase, and the seasonal occurrence of El Nino phenomenon is consistent. November 18, 2008 - January 23 (66 days) of the Earth's rotation accelerated phase, and no change July 30 - November 6 (109 days) the seasonal rotation of the Earth caused by the deceleration phase of the Middle East Pacific downward trend in sea surface temperature, indicating that from August 2007 to May 2008 La Nina event has not been completely released energy, and may be on January 25 to April 7 (72 days) the formation of Earth's rotation deceleration phase of La Nina events. We pointed out in early 2008 after the El Nino La Nina enhance the possibility of extension. Rama entered the world in 2000 during the La Nina cold phase Bradley enhancement reasons. The latest weather information display, although rain this weekend, there will be local, but it is difficult pattern of drought, followed by hot, dry weather will still again, Argentina, Brazil and Paraguay, respectively agencies have reduced their 2008/09 soybean area for pre- assessment, and thus the formation of short-term U.S. soybean strong support. The other hand, La Niña caused by cold weather conditions in central and western United States, likely to continue into the spring before and after the U.S. soybean planting will result in negative concern. January 29, 2009 and February 2, sea surface temperature anomalies comparison (white ice), indicating that La Niña is strengthening. May be on January 25 to April 7 (72 days) to form the Earth's rotation deceleration phase La Nina events that are yet to be confirmed (to projections, the La Nina phenomenon of no more than 3 months), the United States caused by La Niña Midwest cold weather conditions likely to continue into the spring before and after the estimates, indicating that La Niña continued to April 7, more likely. Drought in northern China is inevitable. March-April 2009 period for the weak tides, and tidal north-south oscillation superimposed on a weak spring, increasing the risk of drought. La Nina warning: Focus on the development of La Nina, a severe drought in 2000 alert repeat! (Guangming Yang Xuexiang)