The meaning and origin of solar terms in Xiao Man

1, Xiaoman, one of the "24 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 climate characteristics of heavy rainfall: "Xiaoman Xiaoman, the rivers are getting full". Another explanation is that the seeds of summer sowing crops such as wheat in the north began to fill, but they were only small and not completely full.

2. During the Xiaoman solar term, there will be more and more rainfall in the south of China. Due to the active warm and humid airflow in the south, it meets the cold air from north to south in South China. At this time, there will often be sustained and large-scale heavy precipitation in South China, which will cause heavy rain or torrential rain, just like the folk saying that "the river is getting more and more 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.