Why is the formation of Meiyu related to subtropical high? Do not cut and paste. I read the information on the internet, which doesn't make any sense. The subtropical high stays in the middle and lowe

Why is the formation of Meiyu related to subtropical high? Do not cut and paste. I read the information on the internet, which doesn't make any sense. The subtropical high stays in the middle and lower reaches of the Yangtze River for a long time. The formation of Meiyu is related to subtropical high, mainly because of the seasonal movement and influence of subtropical high.

Subtropical high is a large atmospheric pressure system, which is usually located at about 30 north latitude in summer and moves south in winter. The subtropical high moves northward in summer, which will affect the climate of the Yangtze River basin and bring wet and rainy weather.

Specifically, the northward shift of subtropical high will lead to warm and humid air flow from the south into the Yangtze River basin, forming a rainy season. These warm and humid air currents usually come from the South China Sea and the Indian Ocean, and they are attracted by the southern high pressure area of the subtropical high and move northward. In the Yangtze river basin, due to the subtropical high, it is impossible to continue northward, but it can only hover over the Yangtze river basin, bringing continuous rainfall.

In addition, the seasonal movement of subtropical high will also affect the location and intensity of other weather systems, such as typhoons and cold waves. These weather system changes will also affect the formation of rainy season and rainfall.

In a word, the formation of Meiyu is closely related to subtropical high, mainly because of the influence of subtropical high moving northward in summer on warm and humid airflow and other weather systems.