Main weather

Triple La Nina appears. La Nina and El Nino are brothers and sisters with different personalities. La Nina has always been? Cold? The corresponding word of. The National Oceanic and Atmospheric Administration defines La Nina as the periodic cooling of sea surface temperature in the central and eastern equatorial Pacific Ocean. La Nina usually happens every three to five years or so, sometimes for several years.

We are also puzzled by the mechanism of La Nina phenomenon for three consecutive years. La Nina is a very complicated climate phenomenon, which is caused by the interaction between air and ocean, but its influence on global weather and climate is recognized, and the water temperature in the equatorial Pacific region changes abnormally. Under the background of global warming, the tropical Indian Ocean, the Atlantic Ocean and the western Pacific Ocean are warming rapidly, and the interdecadal and long-term uneven trend of sea surface temperature in the three oceans is conducive to the continuous occurrence of La Nina phenomenon through the influence of basins. The high temperature in South China is caused by the subtropical high. The temperature in North China has been the highest since 5438+00 in June. For example, when the temperature in Hunan, Guangxi, Jiangxi and other places is over 30 degrees, there is no meaning of cooling down. By June 10, cold air was coming, and the temperature in Hefei, Changsha, Jinan and other countries entered the autumn night state.

Coupled with the compass of typhoon landing, the temperature in Hainan and Guangdong coastal areas has dropped significantly, which has dropped below 20 degrees. Now there is another cold air coming, which is expected to last for 14- 17 years, or will be the strongest cold air in the second half of the year. It is expected to affect Jianghan, South China, Jianghuai, Jiangnan and other places, and there may be secondary cooling, so it is expected to be cold in winter in 2022. Judging from the number of songs from winter solstice to Chinese New Year, the Spring Festival in 2022 is just the end of 59 days, and it should not be very cold according to normal rules. However, the weather this year is abnormal. According to the current weather trend, it is expected that the Spring Festival in 2022 will be cold.