Traditional Culture Encyclopedia - The 24 Solar Terms - When is the early spring now?
When is the early spring now?
Beginning of spring is divided from astronomy. According to the position of the sun on the ecliptic, the year is divided into 24 equal parts, that is, the ecliptic is divided into 24 equal parts, and each equal part accounts for 15 degrees of the ecliptic. When the sun runs along the longitude of the Yellow River from zero to 15 degrees, it is called "a solar term".
Running at 360 degrees every year, * * * experiences 24 solar terms. When the sun reaches longitude 3 15, it is called "beginning of spring", usually on February 3-5 every year, so people regard "beginning of spring" as a spring and the beginning of a new year.
Climatic characteristics of 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".
After beginning of spring, the temperature rose, and most parts of the country began a busy spring ploughing season. Beginning of spring solar terms began, westerly jet, the southern branch of East Asia, began to weaken, and the winter climate was coming to an end. However, the intensity and location of the northern branch of westerly jet remain basically the same, the Mongolian cold high and Aleutian low are still relatively strong, and gale cooling is still the prevailing main weather. However, during the intermission under the influence of strong cold air, the frequency of southerly winds increases, accompanied by an obvious warming process. Therefore, it is normal that the weather is still cold after beginning of spring.
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