What are the characteristics of frightful climate?

Sting is the third of the 24 solar terms. On March 5th and 6th, every year, when the sun reaches 345 degrees, it is "in a daze". Sting means that when the weather gets warmer, the spring thunder begins to sound, awakening the insects that are dormant and hibernating underground. Sting means hiding. "Twenty-four solar terms" said: "February Festival, everything vibrates, and when it vibrates, it thunders, so it is called thunder. It's an escaped cockroach. "

Climatic characteristics of Jingzhe Spring: The weather is getting warmer and warmer everywhere. In the infinite fright of spring, most of the south of the Yangtze River is already weeping willows, green grass, butterflies flying and flowers singing. In the middle and lower reaches of the Yangtze River, the warm spring breeze starts from Wuhan in the west and goes to Shanghai in the east, gradually blowing green on both sides of the Yangtze River. People in the Weihe River basin and the middle and lower reaches of the Yellow River began to be busy with spring ploughing, occasionally smelling the spring thunder and feeling the precious spring rain. North of the Great Wall, although the residual snow is pressing the branches, the flowing water of the stream gradually breaks through the ice layer, showing a faint spring scenery. At this time, the northwest, Heilongjiang, Inner Mongolia and other places are still chilly in winter, and there is a spring breeze in ancient times. People are looking forward to the early arrival of spring. In some mountainous areas with high terrain in the northwest and southwest, the weather is still cold, and occasionally there are "three in the snow". Snow is flying all over the sky to welcome spring, which is easy to remind people of the famous poem "Like a spring breeze, at night, it blows open the petals of ten thousand pear trees". Spring thunder: Thunder sounds, heralding spring and a bumper harvest year. Spring thunder often refers to the first thunder in a year. Spring thunder rings and spring returns to the earth. It is the product of cold and warm air meeting, atmospheric instability and convective weather. Farmer friends are very concerned about the time when the spring thunder first sounded. If the first thunder sounds on the day of thunder, you will think that the crops will be in good weather that year; If the first thunder before the fright, it means that there was more rain in that year, and there may be "continuous spring rain"; On the contrary, there may be drought. There is a folk proverb: "Smelling Remy is a mud shock", "Thunder surprises me before it rains in February; After the thunder, it is spring. " These proverbs have been passed down to this day. China is a vast country, and the time when the spring thunder first rings varies greatly. According to the general rule, there is thunder in all seasons along the coast of South China. The first thunder in the middle and lower reaches of the Yangtze River, Huanghuai and Weishui usually occurs in the period of fright, so the thunder in the period of fright mainly refers to these areas. Further north, the first thunder will not appear until April and May, and the first thunder day in Beijing usually appears in late April. Spring cold: the weather is warm and cold at first. Beware of "low temperature and rainy weather" During the shock, it was warm and cold, and farmers in the south were most worried about "low temperature and rainy weather". At this time, warm crops such as early rice and cotton in South China and South Jiangnan began to sow and raise seedlings. In low temperature and rainy weather with average daily temperature ≤ 10℃ for three consecutive days or more, insufficient light will cause early rice to rot; This kind of weather is also extremely unfavorable to the sowing and management of rape, cotton and corn; It is also very unfavorable to the jointing growth of winter wheat, so there is a saying that "one inch of wheat is not afraid of water, and one foot of wheat is afraid of water". Spring drought: air drying and fire prevention in the north are put on the agenda. Spring ploughing began in the north, and people are most worried that too little rain will lead to spring drought. The north is known as "spring rain is as expensive as oil" and "spring drought in nine years". At this time, there are still snowflakes falling in the north, but for the relatively dry northwest and northeast, the snow at this time is very conducive to the increase of soil moisture. If there is decent rain and snow, it is very beneficial to spring sowing production and winter wheat turning green as soon as possible. During this period of time in North China, even if there is snow, it often appears in the form of sleet, and it often falls to the ground in the form of rain.