What are the climatic characteristics of the six solar terms in spring?

Beginning of spring, rain, sting, vernal equinox, Qingming and Grain Rain are six solar terms. In the three months of spring, the cold begins to fade, the climate gradually warms, and everything recovers and germinates. Climate change is characterized by wind. The characteristics of each solar term are described as follows:

Beginning of spring.

Beginning of spring is located at 3 15 degrees on February 5th of the Gregorian calendar every year. Standing is the beginning, which means that from this day on, spring begins and everything has vitality.

The twenty-four solar terms in ancient China were divided into seventy-two periods, with one period every five days. In early spring, the three periods of fifteen days are "when the east wind thaws, when insects start to vibrate, and when fish are frozen." This means that after the beginning of spring, the east wind warms and the earth begins to thaw. Five days after the spring, the stinging insects slowly woke up in the cave. Five days later, the ice in the river began to melt and the fish began to swim on the water. At this time, there is still broken borneol on the water, floating on the water like a fish.

It's raining.

It rains on February 20 of the Gregorian calendar every year, at 330 degrees of the sun's yellow meridian, indicating that the winter with little rain has passed, and the rainfall began to increase gradually, that is, the snow dispersed into water.

At this time, the spring breeze blows all over, the ice and snow melt, the air is moist, and the rain is increasing, so it is called rain. People often say: "Spring blossoms, and rain is busy to send fertilizer." At this time, the frozen soil layer becomes shallow, the surface layer of the soil freezes at night, and it begins to return to pulp, which is beneficial to the greening of wheat and suitable for sowing. The three stages in the rainy solar term are: "One stage is that Rex sacrifices fish; Second, wait for Hongyan to come; Third-class grass sprouted. " It shows that otters began to fish in the rainy season and put the fish on the shore, which seems to be eaten as a sacrifice. Five days later, the geese began to fly back to the north from the south. Five days later, in the "moist and silent" spring rain, vegetation rose everywhere and began to sprout. Since then, the earth has gradually begun to show a thriving scene.

(3) Fear

Every year, March 5th of the Gregorian calendar is a wake-up call, which is 345 degrees in the yellow meridian of the sun. Then spring thunder sounded, the temperature rose, and hibernating animals began to be unearthed. Sting means hiding. Animals get into the soil and hibernate for the winter. This is called a sting. They came out again after rejuvenating the next year. In ancient times, people thought they were awakened by thunder, so they called them stings. From the day of the sting, thunder can be heard, and insects and small animals hibernating underground are awakened by thunder and unearthed. At this time, the temperature and ground temperature are gradually rising, the soil has thawed, and spring ploughing can be started.

The three stages of deworming are "when the peach blossoms bloom, when the oriole (oriole) sings, and when the eagle becomes a pigeon", which awakens all kinds of insects to hibernate in the soil, and the eggs will start to ovulate in winter. Thus, deworming is a solar term reflecting natural phenology. In the season of fright, some parts of China are already in the season of peach blossom red, plum blossom white, orioles singing and swallows coming, and most areas have entered the spring ploughing season. As the agricultural proverb in central China says, "Spring ploughing will not stop after the Spring Festival."

(4) vernal equinox

Every year, March 2 1 day of Gregorian calendar is the vernal equinox, and it is the midpoint of spring at 0 degrees of the solar longitude. At this time, the sun shines directly on the equator and day and night are equal. After this day, the direct point of the sun gradually moved northward, and the days in the northern hemisphere became longer and shorter.

The annual average temperature is about 8℃, and the cold air in the north continues to invade, and the weather is warm and cold at first. The final frost period in northern Shandong is usually at the end of March or early April, and the seasonal water quantity is still scarce, which is generally 5 ~ 10 mm, and the evaporation capacity is obviously increased. The drought in September of ten years is the norm. The three phases in the vernal equinox solar terms are: "migratory birds arrive; Second, wait for Lei Nai to make a sound; Third, wait for electricity. " In other words, after the vernal equinox, swallows will fly from the south, and when it rains, the sky will thunder and lightning.

(5) Qingming

Every year on April 4th of the Gregorian calendar, Tomb-Sweeping Day is at 15 degrees. At this time, the weather is sunny and the climate is warm, and the vegetation begins to sprout and turn green.

"Qingming" means that the climate is mild, the vegetation germinates, the apricot blossoms and peach blossoms bloom, giving people a fresh and clear feeling everywhere. The three stages of Qingming are as follows: "When tung flowers first bloom; Second, the vole became a quail; I'll see you when I wait for the rainbow. " That is to say, at this time, the white paulownia blooms first, then the happy voles in the shade disappear and all return to the underground caves, and then the rainbow can be seen in the sky after the rain. In agricultural production, Qingming is an important solar term, and there is a saying that "Qingming is connected with Grain Rain, so don't delay immersion" and "plant melons and beans before and after Qingming"; There is also a saying in the city that "afforestation is not as good as Qingming". It can be seen that Qingming is a day that people should pay attention to, whether in rural areas or cities.

(6) Grain Rain

Every year on April 2 1 day of the Gregorian calendar, it is Grain Rain, at 30 degrees of the yellow meridian of the sun, which means that rain gives birth to hundreds of valleys. The rain increased obviously, and plants grew sturdily.

At this time of the year, there will be a continuous drizzle, and at this time, peach blossoms are in full bloom, so some people call the rain at this time peach blossom rain or peach blossom flooding. From the beginning of Grain Rain Festival, it is the beginning of busy farming. After Grain Rain, the temperature rose rapidly, and from that day on, the rainfall began to increase. Abundant rainfall has irrigated and moistened the newly planted seedlings and new crops, and the grain is growing well.

Grain Rain's three waiting periods are: "Waiting for leveling up; The second time, pigeons blow feathers; The third class is Dai Ren's surrender. " After Grain Rain, rainfall increased, duckweed began to grow, then cuckoo began to remind people to sow, and then Dai Sheng birds began to be seen on mulberry trees.