Does xiaoman reflect precipitation?

Xiaoman is a reaction to precipitation.

Xiaoman, one of the "twenty-four solar terms", is the second solar term in summer. Xiaoman, battle nail, the sun reaches 60 degrees of the yellow meridian and is celebrated every year on May 20-22 of the Gregorian calendar. A small solar term means entering the rainy season of heavy precipitation, and the rain begins to increase, and there will often be a continuous large-scale heavy precipitation. Xiaoman, like rain, Grain Rain, light snow and heavy snow, are solar terms that directly reflect precipitation. Xiaoman reflects the climatic characteristics of heavy rainfall: "Xiaoman River is full" (south).

Another explanation is that the seeds of summer grain in the north are full, but immature, just small and not full (north).

During the Xiaoman solar term, there is usually a lot of rainfall in southern China. Due to the active warm and humid air flow in the south, it meets the cold air from north to south in the south of China at the intersection of Huangchi and Jiao Jiao. At this time, there will often be sustained and large-scale heavy precipitation in South China, causing heavy rain or torrential rain, just like the folk saying that "the river is easy to be full".

Jiangnan area, are often rivers and lakes. If there is little rain at this stage, it may be that the Pacific subtropical high is weak and located in the south, which means that it is Huangmei season. In the north, there is little or no rain in the solar terms, during which the temperature rises rapidly and the temperature difference with the south further narrows.

Climate change:

The arrival of Xiaoman solar term means that it has entered the rainy season of heavy precipitation, and the rain begins to increase, which often leads to continuous and large-scale heavy precipitation. Xiaoman, like rain, Grain Rain, light snow and heavy snow, are solar terms that directly reflect precipitation. Xiaoman reflects the climatic characteristics of heavy rainfall: "Xiaoman River is full" (south).

During the Xiaoman solar term, there is usually a lot of rainfall in southern China. Due to the active warm and humid air flow in the south, it meets the cold air from north to south in the south of China at the intersection of Huangchi and Jiao Jiao. At this time, there will often be sustained and large-scale heavy precipitation in South China, causing heavy rain or torrential rain, just like the folk saying that "the river is easy to be full". Jiangnan area, are often rivers and lakes. If there is little rain at this stage, it may be that the Pacific subtropical high is weak and located in the south, which means that it is Huangmei season.

In the north, there is little or no rain in the solar terms, during which the temperature rises rapidly and the temperature difference with the south further narrows.

From the climate characteristics, during the period from Xiaoman solar term to Mang solar term, all parts of the country entered summer one after another, the temperature difference between north and south further narrowed, and the precipitation further increased. After Xiaoman, high temperature weather above 35℃ began to appear from the south of the Yellow River to the middle and lower reaches of the Yangtze River. Pay attention to heatstroke prevention at this time.

Xiaoman solar terms, the northwest plateau has entered the rainy season, crops grow vigorously, and there is a scene of prosperity. However, when there is strong cold air heading south, Jiangxi, Zhejiang, Fujian, Guangdong and other provinces will have low temperature and rainy weather with the daily average temperature below 20℃ and the daily minimum temperature below 17℃ for more than three days from late May to early June, which will affect the development, flowering and pollination of early rice ears in these areas.