When is the date of the summer solstice in 2022?

Summer solstice is one of the 24 solar terms, which occurs on June 2 1 or 22 of the Gregorian calendar every year. On the day of the summer solstice, the sun moves to 90 degrees of Gemini's yellow meridian, and the position where the sun shines directly on the ground reaches the northernmost point of the year, almost directly on the Tropic of Cancer. At this time, the sunshine time is the longest in the northern hemisphere. In Beijing, the daytime can be as long as 15 hours. On this day, the northern hemisphere gets the most sunshine, about half as much as the southern hemisphere.

On the solstice of summer, the sun shines directly on the Tropic of Cancer, which is the longest day of the year in the northern hemisphere. It takes about fourteen hours from sunrise to sunset in all parts of Sichuan. Although the summer solstice has the longest day and the highest sun height, it is not the hottest time of the year. Because the heat in the near-surface layer is still accumulating at this time, and it has not reached its maximum.

After the summer solstice, agricultural production in Sichuan Basin entered the field management period due to the vigorous growth of crops and the rapid growth and spread of weeds and pests, and the golden season of grass, fertilizer and livestock began in plateau pastoral areas. At this time, the rainfall in the western part of the basin increased obviously, which gradually changed the distribution trend of rainfall in the basin from the east to the east since the spring.

If there is a summer drought, it is generally expected to be lifted at this time. In recent 30 years, the number of large-scale floods in the western part of the basin in late June is small, but the degree is serious. Therefore, special attention should be paid to preparing for flood control. The summer solstice solar term is the solar term with the largest annual rainfall in the eastern part of the basin, which is often controlled by subtropical high in the future, leading to drought.