What are the weather characteristics after the intense heat?

After summer, the temperature gradually decreases and the temperature difference between day and night gradually increases, but the temperature is still high during the day. After the summer solstice solar terms, although the subtropical high strode south, it would never give up its dominant position easily and easily retreat into the sea of the western Pacific. In the southern areas under its control, it is often late summer, and hot weather is felt again. This is the short-term regenerative weather "autumn tiger".

The duration of autumn tigers varies from year to year, usually lasting from half a month to two months. The reason for the formation of the autumn tiger is that the western Pacific subtropical high that controls China in autumn gradually moves southward, but then moves northward. Controlled by subtropical high, it is cloudy locally, cloudy between sunny days, strong sunshine and rising temperature.

After the solar terms in summer, the thunderstorm activity is not as active as that in hot summer, and the general trend of rainstorm in all parts of the country is weakened. During the summer solar term, the rainfall distribution in South China changed from more in the west to less in the east. In the southwest and west, there are more thunderstorm activities due to the subtropical high edge and mountains.

Agricultural activities in summer

In summer, most parts of southern China are in the busy season of harvesting mid-season rice. Generally, during the summer solar term, the sunshine in South China is still abundant. Except for the western part of South China, there are not many rainy days, which is beneficial to mid-season rice cutting cotton and spitting. During the summer season, fruits and crops in most areas of China gradually entered the mature stage, and farmers stepped up their picking, seized the farming season, and carried out field management such as rice fertilization and weeding.

After summer, the temperature difference between day and night increases. Because the night is cold and the day is warm, the nutrients absorbed by the crops during the day are stored at night, so the crops mature quickly. "The fields change overnight in summer", "There is no valley for three days in summer", "Three Dynasties of rice in summer" and "Summer rice is full of fields, and everyone repairs warehouses", all of which indicate that the crops will be harvested soon after the summer solar term.

Reference to the above content: Baidu Encyclopedia-Chu Shu