Climatic characteristics of 202 1 daylight saving time

1, 202 1 The summer solar term is 5: 34: 48 on August 23rd of the Gregorian calendar and Monday on July 16th of the lunar calendar.

2. long summer is the 14th of the 24 solar terms. Fighting refers to the southwest; The solar meridian reaches150; August 22-24 of the Gregorian calendar every year. Being in the heat is "out of the heat", that is, out of the heat. In summer, the direct point of the sun continues to move southward, the solar radiation weakens, the subtropical high also withdraws southward, the temperature gradually drops, and the summer heat gradually disappears. The arrival of summer means that the hot and difficult weather is over. During this period, the weather is still hot, but it has shown a downward trend.

3. After the intense heat, the temperature drops gradually, and the temperature difference between day and night increases gradually, but the temperature is still high during the day. The reasons for this phenomenon are as follows: first, the direct point of the sun continues to move southward, and the solar radiation decreases; Second, the subtropical high moved southward by leaps and bounds, and the Mongolian cold high began to itch to try.

Although the overall temperature will show a downward trend, it will still warm up for a short time during the summer vacation. This is the "autumn tiger", which usually occurs between August and September. The duration of the autumn tiger is different every year. Generally speaking, it lasts for half a month to two months. Although the temperature is high, generally speaking, the air is dry and sunny, and the temperature difference between morning and evening will not be too high. The reason for the autumn tiger weather is that the subtropical high, which was withdrawn from the south, resumed control again, resulting in high temperature and hot weather with crisp weather and strong sunshine.