The rainy weather in the Yangtze River basin is accompanied by summer drought, so what weather system affects it?

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The rainy weather in the Yangtze River basin is accompanied by summer drought, so what weather system is it affected by?

There are only three weather systems: cold front, warm front and quasi-static front.

Cold front (precipitation position: all behind the front; The slope ahead is the largest)

When the cold front crosses the border, it is cloudy, rainy, windy and cool; After crossing the border, the air pressure rose, the temperature dropped and the weather turned fine.

Typical cold front weather in China: summer rainstorm in the north; Strong winds or sandstorms in northern winter and spring; Winter cold wave

Warm front (precipitation location: front of warm front; Large slope)

When the warm front crosses the border, the clouds thicken and continuous precipitation occurs; After crossing the border, the air pressure decreased, the temperature increased and the rain turned fine.

Typical: South China is warm and sunny in spring, and cold and rainy in spring.

Quasi-static front (precipitation position: extending to a large range behind the front; The slope is very small)

Quasi-static front with low precipitation intensity and continuous rainy weather

Typical: Meiyu weather in the middle and lower reaches of the Yangtze River in early summer; In winter, Guiyang is rainy, cold and humid.

Therefore, the rainy weather in the Yangtze River basin is after the summer drought, so it is affected by the quasi-static front.

During rainy weather, the local area is controlled by quasi-static front and it rains continuously.

During the summer drought, the local area is controlled by the western Pacific subtropical high, and the downward airflow prevails. Hot and dry.