Causes of summer drought and spring drought

1. The spring drought mainly forms in the northern part of spring, especially in North China. The reason is that there is little precipitation in spring, but the temperature rises quickly, the wind is strong, the evaporation is relatively large, the river runoff is relatively small, and the agricultural water consumption is relatively large at this time, so the spring drought is serious. 2. Summer drought mainly occurs in the south of summer, from July to August. Because the rain belt has moved to North China and Northeast China at this time, and the south is controlled by a single warm air mass (affected by subtropical high), the weather is humid but it just doesn't rain, so there is less precipitation during this period. In addition, the high temperature in summer increases the local evaporation, resulting in dry weather in summer in the south.

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