The beginning of summer is one of the 24 solar terms, which also marks the beginning of summer. It describes the unique scene of the beginning of summer. Is it summer after the beginning of summer? Will the weather get hot after the beginning of summer?
May 6, 2019
Is it summer at the beginning of summer: different standards of Meteorology and Astronomy
The beginning of summer is the seventh solar term in the 24 solar terms of the lunar calendar. The first solar term in summer means the official beginning of Mengxia. When the sun reaches 45 degrees of the Yellow longitude, it is the beginning of summer. Dou refers to the southeast, which is called Lixia. Everything grows up here, so it is named Lixia. In astronomy, the beginning of summer means farewell to late spring and the beginning of midsummer.
In China, it is customary to take the beginning of summer as the beginning of summer, and the meteorological summer should be postponed to about 25 days after the beginning of summer. The ancients regarded the fourth, fifth and sixth months of the lunar calendar as summer, while today people regard the sixth, seventh and eighth months of the Gregorian calendar as summer. Westerners generally call summer solstice to autumnal equinox as summer. The scientific division method is that the average temperature above 22 ℃ is summer. Therefore, when the average temperature is lower than 22 ℃, it is the end of summer.
However, from the perspective of temperature, before and after the beginning of summer, only the area south of Fuzhou to Nanling line in China is a real summer with dense green trees and long summer days, and the buildings reflect into the pond, while some areas in the northeast and northwest are just entering spring. For example, the temperature difference between day and night in Xining is about 20 ℃, and the highest temperature has not reached 20 ℃. Xining is still far away from 'summer'. The real summer is still early.
Will it be hot at the beginning of summer: the north and South are vast, the north is cool, and the south is warm
In ancient China, the arrival of spring, summer, autumn and winter was represented by the beginning of spring, the beginning of summer, the beginning of autumn and the beginning of winter. In meteorology, the average temperature of five days is taken as the standard. When the average temperature of five days after winter passes 10 ℃, it means the beginning of spring. When the temperature is higher than 22 ℃, it means the beginning of summer.
In the beginning of summer, the average temperature in most parts of the country is about 18-20 ℃, which is the mid spring and late spring season of "all kinds of red and purple flowers". In May, many places are also in bloom. At the beginning of summer, everything flourishes. China has a vast area of North and south, and the temperature difference between the north and the south is large, and the temperature in the same area fluctuates frequently. The temperature in the rest of South China is about 20 ℃, while the temperature in the low altitude Valley is hot in summer as early as the middle of April, and the temperature has reached more than 24 ℃ at the beginning of summer. So it's cool in the north and a little hotter in the south at the beginning of summer.