Causes of subtropical monsoon climate

The causes of subtropical monsoon climate are as follows:

1, located near the Tropic of Cancer, has a subtropical monsoon climate. The subtropical monsoon climate is mostly north of the Tropic of Cancer, which is mainly caused by the difference of thermal properties between land and ocean. Because it is located in the coastal area, it is affected by the temperature difference between sea and land in summer and Siberian cold wind in winter, with southeast wind blowing and northwest wind blowing. The two control alternately and change seasonally, forming monsoon.

2. The subtropical monsoon climate is distributed on the east coast of the mainland at 25 ~ 35 north latitude, and it is a zone where tropical marine air masses and polar continental air masses alternately control and compete with each other. Mainly distributed in the east of China, south of Huaihe River in Qinling Mountains, north of tropical monsoon climate, south of Japan and south of Korean Peninsula.

It's not cold here in winter. 1 month, the average temperature is generally above 0, and it is hotter in summer. The average temperature in July is generally around 25. In winter, the direction of Xia Feng changes obviously, and the annual precipitation is generally above 1 000mm. When the humid monsoon is active, the precipitation may be above 65,438+0,300mm. Mainly concentrated in summer, less in winter. This climate is most typical in the southeast of China. The precipitation in other areas is considerable in winter, and there is little difference between winter and summer, so it is called subtropical monsoon humid climate.

The subtropical monsoon climate zone is rich in heat resources, with the annual average temperature ranging from 65,438+03C to 20C. The average temperature in the north of the Yangtze River1October is above 0C, 65,438+00C, 0C2C, 2C-65,438+00C in the south of the Yangtze River and 65,438+00C in Nanling.

Due to the low terrain and weak barrier function, Huaiyang Mountain is often affected by cold air in the south in winter, especially Jianghan Plain and Dongting Lake Plain, which are connected to Nanyang Basin in the north and Gui Xiang Corridor in Nantong.

In winter, it becomes a channel for cold air to move southward, and the isotherm of 65438+ 10 is tongue-shaped and protrudes southward. The absolute minimum temperature in the north of the Yangtze River can reach-18 degrees Celsius, and Hankou once reached-18 degrees Celsius. The lowest value is1c (1977 65438+1October 30th), and it is mostly between -7c- 10c in the south of the Yangtze River. Whenever strong cold air goes south, the temperature will drop by more than 10' C, and the temperature in Shanghai will drop by 25% in two days. 2C record.