What is this? Nanila phenomenon.

Nanina refers to the phenomenon that the sea surface temperature in the eastern and central equatorial Pacific Ocean continues to be unusually cold. It comes from Spanish transliteration and is a new word used by the meteorological and marine circles in the 1980s, which means "little girl", just the opposite of El Ni? o, meaning "El Ni? o" (the son of God), also known as "anti-El Ni? o" or "cold event". According to the records since 1950, the frequency of El Ni? o is higher than that of La Ni? a. Under the background of global warming, the frequency and intensity of La Ni? a tend to decrease.

Nanina refers to the phenomenon that the sea surface temperature in the eastern and central equatorial Pacific Ocean continues to be unusually cold. It comes from Spanish transliteration and is a new word used by the meteorological and marine circles in the 1980s, which means "little girl", just the opposite of El Ni? o, meaning "El Ni? o" (the son of God), also known as "anti-El Ni? o" or "cold event". According to the records since 1950, the frequency of El Ni? o is higher than that of La Ni? a. Under the background of global warming, the frequency and intensity of La Ni? a tend to decrease.

In southern Nina, the SST in the equatorial eastern Pacific decreases, the SST in the western Pacific is higher, the East Asian summer monsoon is stronger, and the subtropical high in the western Pacific moves northward, which makes the summer monsoon rain belt in China move northward, often located in the Yellow River basin and its northern area. Therefore, it is more likely that there will be more rain from North China to Hebei and less rain in Jianghuai Basin.

In La Nina year, Leng Xia fever in winter is easy to occur in China, that is, the temperature in winter is lower than normal and the temperature in summer is higher. In La Nina events since 195 1, more than 70% of the years are cold winters. However, since 1980s, the global climate has been warming. 1988 Although there was a strong La Nina event, there was no obvious winter phenomenon.

In La Nina year, the sea temperature in the western Pacific was high, and the convection activity was extremely active. The number of typhoons generated and landed in China in the northwest Pacific and South China Sea is more than normal. There are 29 typhoons in the northwest Pacific and South China Sea, and the annual average of La Nina is 3 1. 7~8 people landed in China all the year round, and 9 people landed in La Nina. The year with the largest number of typhoons in history is as many as 40 years, and the typhoon with the largest number of landings is 12, all of which occurred in La Nina year.

In La Nina year, the SST in the equatorial eastern Pacific decreased, the SST in the western Pacific was higher, the summer monsoon in East Asia was stronger, and the subtropical high in the western Pacific moved northward, which made the summer monsoon rain belt in China move northward, often located in the Yellow River basin and its northern area. Therefore, the area from North China to Hebei is likely to be rainy, and the Jianghuai Basin is less rainy.

In La Nina year, Leng Xia fever in winter is easy to occur in China, that is, the temperature in winter is lower than normal and the temperature in summer is higher. In La Nina events since 195 1, more than 70% of the years are cold winters. However, since 1980s, the global climate has been warming. 1988 Although there was a strong La Nina event, there was no obvious winter phenomenon.

In La Nina year, the sea temperature in the western Pacific was high, and the convection activity was extremely active. The number of typhoons generated and landed in China in the northwest Pacific and South China Sea is more than normal. There are 29 typhoons in the northwest Pacific and South China Sea, and the annual average of La Nina is 3 1. 7~8 people landed in China all the year round, and 9 people landed in La Nina. The year with the largest number of typhoons in history is as many as 40 years, and the typhoon with the largest number of landings is 12, all of which occurred in La Nina year.