What does Grain Rain mean? Grain Rain is a solar term with increasing precipitation.

1, Grain Rain is a solar term reflecting precipitation phenomenon, and obvious rainfall often begins in Grain Rain season. Monsoon climate is the main feature of China climate, which is a mixture of continental climate and maritime climate. Climate refers to the multi-year average state of the atmosphere in a region. The main climatic factors include temperature, precipitation and light, among which precipitation is an important one. The precipitation in China is mainly brought by the southeast monsoon, so the precipitation in China is characterized by "decreasing from the southeast coast to the northwest inland" in geographical space.

2. The southeast monsoon brings water vapor from the ocean to China, and the southeast coastal area of China will first get water vapor from the southeast monsoon to form abundant precipitation, making it the region with the richest annual precipitation in China. The eastern monsoon region of China is bounded by the first line of Qinling and Huaihe River, and the annual precipitation in the "southern region" south of Qinling and Huaihe River is over 800 mm, which belongs to the humid region. The annual precipitation in the "northern area" north of Huaihe River in Qinling Mountains is mostly between 400 and 800 mm, which belongs to semi-humid area. The annual precipitation in northwest China is mostly below 400 mm, which belongs to semi-arid and arid areas.

3. From the regional distribution of annual precipitation, the annual precipitation in China generally decreases from southeast to northwest, and the northwest region of China is the region with the least annual precipitation because it is located inland and far from the ocean. Judging from the seasonal distribution of precipitation, precipitation in China is mainly concentrated in summer, that is, when the southeast monsoon prevails, so the climate characteristic of China is "the same period of rain and heat". The northwest monsoon from Eurasia prevails in winter in China, with less water vapor content and less precipitation.

4. Grain Rain and Grain Rain are the last solar terms in spring, and it is the end of spring. At this time, the seedlings in the field are planted first, and the new crops need rain most. After the solar term in Grain Rain, the rainfall increased and the humidity in the air gradually increased, which is very suitable for the growth of cereal crops. The main weather feature of Grain Rain is rainy, which is beneficial to grain growth. In the southern region, "Huayang falls", willow falls, cuckoo cries at night, peony spits out, and cherry is red and ripe; In the northern region, Grain Rain is a symbol of "the last frost", and most of the first thunder in the northern provinces occurred in the Grain Rain solar term.