Auther：2022-05-19
Xiaoman, one of the twenty-four solar terms, is the second solar term of summer. Xiao Manchu, the nail of the bucket, the sun reaches 60° of the yellow meridian and crosses the festival on May 20-22 of each year in the Gregorian calendar. Xiaoman Festival means the entry of the rainy season with significant precipitation, rain starts to increase and often there is a continuous and extensive heavy precipitation. Xiao Manchu is a festival that directly reflects precipitation, just like Rain, Gu Yu, Xiao Xue and Da Xue. Xiaoman reflects the climatic characteristics of heavy rainfall: Xiaoman Xiaoman, the rivers are gradually full. At the same time, it is also said that the seeds of summer crops such as wheat in the north begin to fill, only a small full, not yet fully full.
During the Xiaoman Festival, the southern part of China will generally have more rainfall and heavy rainfall. Due to the active warm and humid air currents in the south, and the cold air from the north south in southern China convergence, this time in southern China will often be a continuous and extensive heavy precipitation, resulting in heavy or very heavy rainfall, as the folk proverb small full, rivers gradually full. Jiangnan area is often full of rivers and lakes, if the rain is low at this stage, it may be the Pacific subtropical high pressure is weaker, the position of the south, meaning that to the yellow plum season. In the north, little or no rainfall during the Xiaoman Festival, the temperature rises quickly during this period, and the temperature difference with the south is further reduced.
