No summer, no grain, no ants.
As we all know, there is a folk saying that "summer is not summer, and grains are not drums". Among them, "summer is not summer" refers to the solar terms in the 24 solar terms, and "summer is not summer" means that the weather is not hot. If it is not hot in summer and the temperature is low, it will adversely affect the growth of crops and affect the harvest of grain.
Because at this time, crops need the corresponding temperature to promote growth, if the temperature is low, it may lead to insufficient crop growth, reduced yield and affected grain harvest.
Introduction to Great Summer:
Summer is the twelfth solar term among the twenty-four solar terms and the last solar term in summer. The ecliptic of the sun is 120, which is from July 22nd to 24th in Gregorian calendar. "Summer heat" is heat, and summer heat is extremely hot.
Summer heat is hotter than summer heat. Summer heat is the most intense and hottest solar term in a year, and "hot and humid steaming" reaches its peak at this time. Climatic characteristics of the great summer heat: high temperature and intense heat, frequent thunderstorms and typhoons.
The summer solar term is the hottest time of the year, just before and after the "midsection" of the "dog days". In summer, the sun is like fire, the temperature is high, the humidity is high, and there is much rain. Although it is inevitable to suffer from high temperature and humidity, it is very beneficial to the growth of crops, and crops grow fastest during this period.
The summer heat is the hottest and wettest season of the year, and the focus of health care at this time is "heatstroke prevention" and "dampness elimination".
China is a typical monsoon climate, which is controlled by subtropical high and other atmospheric circulation systems. From mid-June to mid-July, the main rain belt in eastern China generally extends from South China and Jiangnan to Jianghuai area.
The end of July ("seven drops and eight liters") is equivalent to the period from the scorching heat to beginning of autumn. With the seasonal northward movement of the subtropical high circulation system, the southwest monsoon will also push northward. The southwest wind around the subtropical high will transport the tropical and subtropical warm and humid airflow to the northern region, where it will meet the cold air in the mid-latitude of North China and Northeast China, and North China and Northeast China will begin to enter the rainy season.
Northwest China is the arid area with the least annual precipitation in China, because it lives inland and far from the ocean.