El Ni o s Impact on China 10

Weaken the warm current along the coast. The cold snap along the coast becomes stronger. The rain band moved south. The drought in the north is getting heavier. Reduced fisheries production. Crop damage. ，。

The main thing is the impact on the climate.

El Niño events.

It will indeed have a certain impact on the climate of our country, according to the development area of El Niño, mainly reflected in the tropical Middle East.

In the Pacific region, there is an anomalous warming that develops in the northern hemisphere in the spring, builds up in the summer, peaks in the winter, and weakens in the following spring. Therefore, this is also the El Niño process that is just in line with this forecast, resulting in a high pressure anomaly in the northwest Pacific.

From December 2018 to February 2019, there was a moderate intensity of El Niño eventsSouth ChinaIt will experience a warmer, wetter climate. And North China andNortheast.

Combined with the meteorology of Japan and the United Kingdom**, then in winter, China's climate will show typical El Niño winter characteristics. Therefore, the characteristics of El Niño do vary a lot.

El Niño is affecting China's winter climate, so not all regions will change at the same time, for the south of North ChinaTibetan PlateauTo the east, El Niño has a strong impact; However, for the north of China, especially the northeast region, the local impact is relatively small.

Causes of El Niño

1. The southeast trade winds weakened.

When the Southern Hemisphere. When the southeast trade winds blowing near the equator weaken, the cold water flooding in the Pacific Ocean will decrease or stop, resulting in a wide range of abnormal warming of sea water temperature, and the traditional equatorial balance current and atmospheric circulation.

The occurrence of abnormal incidents has led to unusual precipitation in some parts of the Pacific coast and severe drought in others.

2. The rotation of the earth.

When the Earth's rotation decelerates, the "brake effect" causes the atmosphere and sea water in the equatorial belt to gain an eastward inertia, the equatorial current and trade winds weaken, the warm water in the western Pacific Ocean flows eastward, and the cold water in the eastern Pacific Ocean is blocked.

El NiñoIt is easy to lead to warm winters, heavy rains and floods in southern China, and high temperatures and droughts in northern QiaosongNortheast ChinaProne to cold summers.

China is a typical country with a continental monsoon climate, and the precipitation is mainly concentrated in the summer when the southwest and southeast monsoons prevail. Warm and moist air currents from the ocean can penetrate deep into the interior and produce abundant precipitation. The rain belt in eastern China has obvious seasonal and northward characteristics.

El Niño also has a certain relationship with the summer temperature in the northeast of the country. Statistics show that in the summer of El Niño years, the cold air activity in Northeast China tends to intensify, resulting in abnormally low summer temperatures in Northeast China, resulting in low temperature and cold damage, resulting in a decrease in grain production.

The law of El Niño.

El Niño is a cyclical natural phenomenon.

It appears approximately every 7 years. Through the study of global climate, scientists believe that El Niño is not an isolated natural phenomenon, but an aspect of global climate anomalies. In a normal year, Peru.

The Pacific coast of the west coast is controlled by a cold ocean current and has a large range of natural fishing grounds. In the event of a climate anomaly, the cold ocean currents in the eastern Pacific Ocean are replaced by a warm ocean current.

For China, El Niño is prone to warm winters, heavy rains and floods in the south, high temperatures and droughts in the north, and cold summers in the northeast. Extreme weather is more dangerous than mere temperature changes.

1) Fewer typhoons. The number of tropical storms (typhoons) in the western Pacific and the number of landfalls along the coast of China are lower than those in normal years.

2) The summer monsoon is weak, and the monsoon rain belt is southerly, located in central China or south of the Yangtze River. The northern region is prone to drought and high temperature in summer, and the southern region is prone to low temperature and flooding. Severe floods in China in the past 100 years, such as the floods in the middle and lower reaches of the Yangtze River in 1931, 1954 and 1998, all occurred in the year following the emergence of the El Niño phenomenon.

3) In the winter after the occurrence of El Niño, the northern part of China is prone to warm winters.

Brief introduction. On the west coast of South America, in the eastern part of the South Pacific, there is a famous Peruvian cold snap that flows from south to north. The Southern Hemisphere summer season runs from October to March.

Water temperatures in the southern hemisphere are generally warm. The eastward equatorial countercurrent strengthens at this time, when the global pressure and wind bands move southward and northeast trade winds cross the equator.

Due to the rotational deflection force of the Southern Hemisphere, it deflects to the left into the northwest monsoon. The northwest monsoon not only weakens the offshore southeast trade winds on the west coast of Peru and weakens or even disappears the cold water of Peru, but also blows the high equatorial countercurrent water southward in the direction of the Peruvian cold current, transforming the Peruvian cold current into a warm current. This unstable current is known as the El Niño Current.

Usually this "uninvited guest" disappears after March as the water temperature on the west coast of South America gets colder.

El Niño is a natural phenomenon in which the temperature of the eastern equatorial Pacific Ocean rises abnormally, resulting in changes in the global climate system. The impact of El Niño on China is mainly manifested in the following aspects:1

Temperature and precipitation: El Niño years typically result in warmer winters and cooler springs in southern China, with less precipitation in the south and widespread and persistent snowfall or heavy rainfall in the north. 2.

Natural Disasters: Due to climate change brought about by the El Niño phenomenon, China may face more extreme weather, such as droughts, floods, storms, sandstorms, etc., which often cause huge losses to people's lives and property. 3.

Agriculture and the economy: Due to the impact of the El Niño phenomenon, China's agricultural production may also be affected, and some food crops may be reduced, which will also lead to certain commodities, which will adversely affect the economy. In conclusion, El Niño is a complex natural phenomenon that has important implications for the global climate system.

Although its specific impact on China is uncertain, in the face of such uncertainty, we need to strengthen meteorological monitoring and disaster warning capabilities, and take corresponding measures to mitigate its possible negative impacts.