Movement law of rain belt in eastern China

China is a country dominated by monsoon climate. In summer, subtropical high is the most important weather system affecting summer and autumn in China. The northern side of the western Pacific subtropical high is the intersection of warm and humid airflow in the north and cold air in the middle latitude and south. Cyclones and frontal systems are active frequently, often resulting in large-scale rainy and rainstorm weather, which has become an important precipitation area in eastern China.

The rain belt in the east of China is mainly located in the northeast and north China, at this time, the precipitation range in China is large; In the eastern monsoon region of China, only the Jianghuai region has less precipitation, which is due to the strengthening of the Pacific subtropical high, which extends westward and pushes northward, controlling the Jianghuai region, making the Jianghuai region prevail with downward flow, thus forming hot and dry summer weather and causing very serious drought of crops, especially rice. At this time, if typhoons (bringing typhoons and rainstorms) frequently land, the drought here can be greatly alleviated. Landing in Chinese mainland in April

It moved to the Yangtze River valley in May, and the quasi-static front in the Yangtze River valley formed "Meiyu" weather from May to June.

From June to July, the rain belt moved northward to North China, followed by the wind belt, and the Yangtze River basin was controlled by the subtropical high, forming a "summer drought" weather.

Moved to the northeast in August.

It began to move southward in September, and 5438+ 10 was completely evacuated from Chinese mainland in June.