What are the characteristics of the 24 solar terms rain?

1. Rainwater is located on the 15th day of the first month of each year (February 18-20 in Gregorian calendar), and the solar term starts on rainy days and ends before the day of fright (March 4-5 in Gregorian calendar). The direct point of the sun is approaching the equator from the southern hemisphere. At this time, in the northern hemisphere, the sunshine hours and intensity are increasing, the temperature is rising rapidly, and the warm and humid air from the ocean is becoming active and gradually moving northward. At the same time, cold air is not to be outdone in the weakening trend, and it frequently competes with warm air, unwilling to quit its hegemony and refuse to take away the residual cold.

It began to rain, and the rain gradually increased. The rainy season means that it begins to rain and the rainfall gradually increases. In the Yellow River Basin, the birthplace of the twenty-four solar terms, the weather was cold before it rained, but there were snowflakes flying and the rain was falling, which was unpleasant. After the rain, the temperature can generally rise above 0℃, with less snow and more rain. However, in the warm southern region, even in the dead of winter, rainfall is not uncommon. The average temperature in most parts of southern China in this period is above 10℃, peaches and plums are in bud, and cherries are in full bloom. It has indeed entered a climatic spring. In addition to a few years, the frost period has come to an end. It is timely to graft fruit trees and plant trees. After a dry winter in South China, there are many droughts in spring all the year round, especially in the west of South China. Spring rain is as expensive as oil. In addition, the invasion of cold wave will cause strong cooling and snowstorm, which will do great harm to the old, weak and young animals. These should pay special attention to prevention.

Rain not only indicates the beginning and increase of rainfall, but also indicates the rise of temperature. It was cold before it rained. After the rain, people obviously feel that spring has returned to the earth, and it is warm in bloom, full of spring, and people's breath inspires their bodies and minds.

4. The low-temperature rain and snow weather has passed in most parts of the country, and the rainfall gradually increases after it begins to rain, which is conducive to the greening or growth of overwintering crops. It is necessary to pay close attention to the field management of overwintering crops and make good preparations for seed selection, spring ploughing, fertilization and other spring ploughing and sowing.