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202 1 When will the rainy season begin? How many days are there this year?
When 20021year comes, people should not only pay attention to the changes of life, but also pay attention to the changes of weather. Especially when the rainy season comes, if they are prepared, they can also avoid some damp situations at home and make their bodies in a particularly healthy state.

202 1 Meiyu Season Time: The rainy season in China is during the two solar terms of awn seed and light summer. The ancient people's calculation method of rainy season is that the first "third day" after the solar term of awn seed is the time of plum blossom, and the first "last day" after the solar term of light summer is the time of plum blossom. So the rainy season of 202 1 is between June 7th and June1of 202 1. The rainy season is basically from mid-June to the first half of July every year, sometimes it may be longer or shorter than this time, depending on the region and the situation of the year. How long does the rainy season last? The duration of plum rains in different areas of China is different. Jiangnan District: June 8th (Mei)-July 8th (Mei): Middle Yangtze River: June 15 (Mei)-July 14 (Mei): Lower Yangtze River: June 19 (Mei).

The cause of the rainy season is 1. There is a blocking high-pressure ridge or a stable high-pressure ridge in the middle troposphere in high latitudes of Asia, and the atmospheric circulation is relatively stable and rarely changes. 2. The westerly circulation in the mid-latitude area is gentle, and frequent short-wave activities provide cold air conditions for the Jianghuai area. 3. The western Pacific subtropical high has an obvious process of extending westward and jumping northward. The ridge line of the 500 HPA subtropical high is stable between 20 and 25 degrees north latitude, and the warm and humid air flow is transported from the edge of the subtropical high to the Jianghuai basin. Under this circulation condition, Meiyu front lingers in the Jianghuai basin, often accompanied by southwest vortex and shear line, and the mesoscale system on Meiyu front is active. It not only maintains the continuous precipitation during the rainy season, but also provides abundant water for the rainstorm, which is the reason for the rainy season.

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