Traditional Culture Encyclopedia - The 24 Solar Terms - When will the rainy days in Shanghai begin to end in 2022?
When will the rainy days in Shanghai begin to end in 2022?
The rainy season generally falls in two solar terms, namely, grain planting and off-season. The calculation method of ancient plum rain period is that the first "dog days" after the solar term of grain planting is plum time, and the first "non-day" after the solar term in summer is plum time.
Time of entry and exit of plums in different regions:
Jiangnan District, June 8th (entering plum blossom)-July 8th (leaving plum blossom).
The middle reaches of the Yangtze River, June 15 (entering the plum blossom)-July 14 (leaving the plum blossom).
The lower reaches of the Yangtze River from June 19 to July 12.
June 2 1 (entering Mei)-July 15 (leaving Mei) Jianghuai area.
Causes of Meiyu season
Every year from late April to early May, cold air from the north meets warm air from south to north in South China, forming a quasi-static front in South China. Around the end of May, the warm air force strengthened, and the quasi-static front moved northward to the Jianghuai area, becoming the quasi-static front of the Jianghuai area (also known as Meiyu front).
Because the warm air from the south carries a lot of water vapor, it will produce a lot of convection when it meets the cold air mass. During this period, the intensity of cold and warm air is very strong, and the front stays in the Jianghuai area.
Typical plum rains generally "enter plum blossoms" in the middle and late June, and plum blossoms are in full bloom in early to mid-July. Meiyu refers to the rainy days before plum blossom, which generally starts in mid-April and lasts for about half a month.
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