Causes of frequent droughts in Fujian coastal areas

Fujian coast is located in subtropical zone? Among them, the north of Minjiang Estuary is in the middle subtropical zone. The Minjiang Estuary and its south area belong to the south subtropical zone? Climate and precipitation are influenced by the mountains on both sides of the Taiwan Province Strait, restricted by monsoon circulation and regulated by the ocean, and have typical subtropical maritime monsoon climate characteristics. (Marine monsoon climate, summer temperature is not too high, a little lower than subtropical monsoon climate. The temperature in winter is not too low, but higher than that in subtropical monsoon climate. In the whole year, the air temperature and precipitation are small, and the maritime monsoon climate is mostly distributed on some small islands in the ocean, surrounded by the sea, which is greatly influenced by the ocean and has obvious maritime characteristics. The drought in autumn in Fujian is particularly serious.

Autumn (10 ~165438+10 month)? It is a period when the atmospheric environment changes from summer to winter. In the first half of June, 5438+ 10, the ridge of subtropical high jumped back to about 22 N, the westerly wind in the south was established, the East Asia trough deepened, the ground cold high wedge extended to South China, and the cold air in the north periodically went south. Although the cold air is not too strong, due to the large pressure gradient between north and south, there are often obvious cooling and windy weather. A basic feature of the weather situation in autumn is that when the subtropical high in the South China Sea is strong, it is sunny and rainy, and it is prone to drought.