Climatic characteristics of rain solar terms
Climatic characteristics of rain solar terms. Rain is one of the traditional 24 solar terms in China. Rainwater solar term means the beginning of rainfall, indicating that rainfall is gradually increasing. We need to know more about rainy weather. This paper expounds the climatic characteristics of rainwater solar terms.
Climatic characteristics of rain solar terms 1 characteristics of rain solar terms
Rainwater is located on the 15th day of the first month of each year (February 18-20), and the solar term starts on rainy days and ends before the day of fright (March 4-5). The direct point of the sun is approaching the equator from the southern hemisphere. At this time, in the northern hemisphere, the sunshine hours and intensity are increasing, the temperature is rising rapidly, and the warm and humid air from the ocean is becoming active and gradually moving northward. At the same time, cold air is not to be outdone in the weakening trend, and it frequently competes with warm air, unwilling to quit its hegemony and refuse to take away the residual cold.
It began to rain, and it gradually increased. The rainy season means that it begins to rain and the rainfall gradually increases. In the Yellow River Basin, the birthplace of the twenty-four solar terms, the weather was cold before it rained, but there were snowflakes flying and the rain was falling, which was unpleasant. After the rain, the temperature can generally rise above 0℃, with less snow and more rain. However, in the warm southern region, even in the dead of winter, rainfall is not uncommon. The average temperature in most parts of southern China in this period is above 10℃, peaches and plums are in bud, and cherries are in full bloom. It has indeed entered a climatic spring.
Rain not only indicates the beginning and increase of rainfall, but also indicates the rise of temperature. It was cold before it rained. After the rain, people obviously feel that spring has returned to the earth, spring is blooming, spring is full, and people's breath is inspiring their body and mind. The cold and snow time has passed in most parts of the country, and it began to rain, and the rainfall gradually increased, which is conducive to the greening or growth of overwintering crops. It is necessary to pay close attention to the field management of overwintering crops and make good preparations for seed selection, spring ploughing, fertilization and other spring ploughing and sowing. During the15th day of the rainy solar term, we went from the sixth day of July to the second day of September. "Eighty-nine swallows were planted in the river on July 9, and cattle were plowed everywhere on September 9 and September 19." This means that most areas in the northwest, northeast and southwest plateaus are still in the cold winter, and many other areas are experiencing or have completed the transition from winter to spring under the urging of spring breeze and rain.
However, in the rainy season, cold air activities in the north are still frequent and the weather is changeable. Since we talk about the frequent cold air activities in the next season, we can't help but mention what people often say about "spring cover". This is the principle of dressing and keeping in good health put forward by the ancients according to the characteristics of spring climate change. In early spring, when the sun is shining and the climate is getting warmer, people gradually go to cotton and wear light clothes. But at this time, it is still cloudy and cold in the north, and the temperature changes greatly. Although the rainy season is not as cold as the winter, the human skin has become relatively slack, and the resistance to the evil of wind-cold will also be weakened, so it is easy to get sick by evil. So it makes sense to pay attention to "spring cover" at this time. This changeable weather is easy to cause people's mood swings and even anxiety, which affects people's physical and mental health, especially those with hypertension, heart disease and asthma. In order to eliminate these unfavorable factors, besides continuing to cover them in spring, we should also adopt positive psychological exercise methods. Maintaining emotional stability plays a very important role in physical and mental health.
Climatic characteristics of rain solar terms II.
The rainy season means that it begins to rain and the rainfall gradually increases. In the Yellow River valley, the birthplace of the 24 solar terms, it was cold before the rain, but it was snowing and raining unpleasantly. After the rain, the temperature can generally rise above 0℃, with less snow and more rain. However, in the warm climate of Sichuan Basin, even in the dead of winter, rainfall is not uncommon. During this period, the average temperature in Sichuan Basin is mostly above 10℃, with peaches and plums in bud and cherries in full bloom. It is indeed a climatic spring.
In addition to a few years, the frost period has come to an end. It is timely to graft fruit trees and plant trees. After the dry winter, there are many droughts in spring all the year round, especially in the west of the basin. In agriculture, attention should be paid to moisture conservation and timely irrigation to meet the water supply at the jointing and booting stage of wheat and the critical period of bolting and flowering of rape. The mountainous area of western Sichuan Plateau is still in the dry season, with low temperature and high wind speed, which is prone to forest fires.
In addition, the invasion of cold wave will cause strong cooling and snowstorm, which will do great harm to the old, weak and young animals.