What is summer drought?

The drought in dog days, called summer drought, belongs to the disastrous climate in monsoon region. Summer drought has a great impact on agricultural production, as well as industrial and mining water, domestic water and shipping; It is also dry heat and water shortage that causes diseases and harms human and animal health.

Generally speaking, from mid-July to mid-August (from the third Geng day after summer to 10 day after July 12 every year), at this time, the Meiyu stationary front moved to the middle and lower reaches of the Yellow River and northeast China in early July, and the middle and lower reaches of the Yangtze River were controlled by "subtropical high", resulting in anticyclonic weather, mainly subsiding airflow, with long sunshine time. Crops grow fast, and farmland needs a lot of water. However, due to the single air mass, except for thunderstorms in some areas, there is no big rain area, and generally there is dry and hot summer weather, so it is called "summer drought". In this season, the afternoon temperature in the middle and lower reaches of the Yangtze River generally reaches 33 ~ 35℃, and the high temperature as high as 43 ~ 45℃ appears in some places. Generally, under the control of the subtropical high in the western Pacific Ocean, severe drought is prone to occur under the condition of less typhoon drought. It mainly occurs in the Yangtze River basin and the south of the Yangtze River, especially in Hubei, Hunan, Jiangxi, Jiangsu, Anhui and other provinces. When the subtropical high in the western Pacific is controlled and typhoon activity is low, severe drought is prone to occur, and the precipitation is obviously less than the multi-year average. /view/44844.htm