Phenological changes in beginning of spring What are the three climaxes in beginning of spring?

Lead: The transition from winter to spring does not happen overnight. Many times, everything in nature is quietly waiting for the arrival of spring, and our perception of nature is very slow. Maybe you can find the traces of spring through the phenological changes in beginning of spring. Next, we will explain in detail what is the beginning of the "three seasons" in spring. Come and have a look!

Phenological changes in beginning of spring What are the three climaxes in beginning of spring?

The first weather in beginning of spring was "the east wind thawed", and the east wind brought warmth, which solved the long-term frozen cold of the earth. The second stage is "the sting begins to vibrate", which means hiding, that is, all the bugs lurking underground wake up from hibernation. The third stage is "negative ice of fish", which means rising. Because of the warming water temperature, fish compete to surface, but there is still undissolved broken ice in the water. From the shore, it looks like a fish with ice on its back swimming in the water.

"beginning of spring" is the first of the 24 solar terms, and "beginning of spring" is the first day of spring. "Li" means insightful, and it also means that the past has passed, and the arrival of dogs is greater in winter than in spring. Therefore, the beginning of summer, autumn and winter is called calendar. Because the Big Dipper points to the east at the beginning of spring, the east is considered as the orientation of spring.

In people's minds, spring is warm and fragrant: it is also the season of sowing and growing.

The climate in early spring

In climatology, spring refers to the period when the average temperature of Ni is 10-22℃. But in early spring, the difference between the highest temperature and the lowest temperature in a day is often 10- 15℃, and sometimes the temperature is even above 20℃ for a day or two, and there is often light snow falling.

When beginning of spring arrived, people obviously felt that the days were getting longer, the sun was getting warmer, the temperature was getting higher, the sunshine time was prolonged, and it began to rain. Agricultural proverbs remind people that "it rains in early spring, get up early and go to bed late". In the spring, the preparation for bamboo cultivation in the north began.

Although it is spring, most parts of South China are still very cold, and there is a scene of "snow is too late for spring, so it flies among the trees in the courtyard". In early spring, the south is alive again. In the pond or beside the stream, ducks and geese spread their wings in the water and wander freely and happily for food. Animals directly feel the warmth of spring with their bodies, and people use clothes to adapt to the change of temperature. At the beginning of spring, it is warm and cold, alternating with cold and warm, and the cold and hot weather enriches people's lives.

The origin of beginning of spring

Beginning of spring is also a traditional folk festival, which is called "Spring Festival". China has been an agricultural country since ancient times, and the key is spring. There is a saying in the folk proverb that "a year's plan lies in spring". The ancient custom in beginning of spring is not only an ancient solar term, but also an important festival. "The Origin of Things" records: "beginning of spring first made local cattle, and unearthed them to show the farming time." Feudal rulers of later generations held a whipping ceremony on this day to encourage farming and develop production.

For example, beginning of spring coincides with the first day of the first month. As the saying goes, "a year's plan lies in spring", once in a hundred years. People think that this year's harvest must be very good. There is a folk proverb, "It's hard to meet spring in a hundred years."

Beginning of spring, as a festival, existed as early as the Spring and Autumn Period. At that time, there were eight festivals in a year, namely beginning of spring, Changxia, beginning of autumn, beginning of winter, Vernal Equinox, Summer Solstice and Winter Solstice. Twenty-four solar terms were recorded only in the Book of Rites and the Monthly Order by Liu An in the Western Han Dynasty and the Xunzi of Tian Zi in Huainan.

Before the Han Dynasty, the calendar had been changed many times. At that time, beginning of spring among the 24 solar terms was designated as the Spring Festival, which meant that spring began. This title lasted for more than 2000 years, until 19 13, when the national government officially issued a document, making it clear that the first day of the first month of the first month of each year was the Spring Festival.

Since then, beginning of spring has only existed as one of the 24 solar terms, and it has been passed down to this day.

Is it still cold after beginning of spring?

The biggest feature of beginning of spring's solar term climate is that it is warm and cold at first sight: First, the temperature difference between day and night is large; Second, cold air activities are frequent. In spring, due to the invasion of cold air, the temperature is obviously reduced, and it is often sunny during the day, which makes people feel that warm wind makes tourists intoxicated, but it is chilly in the morning and evening, which makes people feel "chilly in spring".

Beginning of spring has arrived, but the temperature will not rise so fast. In addition, as the old saying goes, it is not recommended that people take off their winter clothes too early and put on bright spring clothes, especially for the elderly and children, and pay more attention to keeping warm. Meteorological significance, the average daily temperature is higher than 5℃ for five consecutive days, and winter ends. Twenty-four solar terms think that winter ends around "fright". In the Gregorian calendar, winter ends around the beginning of March.

As far as the radiation intensity of the sun to the earth is concerned, the winter solstice is the smallest and the summer solstice is the largest. If the whole year is divided into four parts on average, three months from beginning of winter to beginning of spring is the smallest, three months from beginning of spring to Changchun are in the middle, three months from Changchun to beginning of autumn are the largest, and three months from beginning of autumn to beginning of winter are in the middle. But the actual temperature lags behind the solar radiation 1 month. So if there are three months of winter, there will be about 1 month after beginning of spring, which belongs to winter in climate.