The first solar term

The first solar term is beginning of spring.

Beginning of spring, the first of the 24 solar terms, stands for "beginning"; Spring represents warmth and growth. Twenty-four solar terms were originally formulated according to "variable stars". When the bucket handle of the Big Dipper points to the shade, it is beginning of spring. At present, solar terms are determined according to the longitude of the sun. When the sun reaches the longitude of 365,438+05, it is the beginning of spring, and the festival is held on February 3-5 of the Gregorian calendar every year.

In the era of cadres and branches, silver moon is spring, beginning of spring is the first year, and beginning of spring is the beginning of everything, which means all self-renewal, which means a new cycle has begun. In the traditional concept, beginning of spring has auspicious meaning, and beginning of spring symbolizes that the winter when everything is hidden has passed, and everything grows in spring. In nature, the most striking feature of beginning of spring is that everything begins to show signs of recovery, while in beginning of spring, it is in the Tropic of Cancer of China.

Meteorological change

In early spring, westerly jet, the southern branch of East Asia, began to weaken, while the strength and position of westerly jet, the northern branch, remained basically unchanged. The Mongolian cold high and Aleutian low are still relatively strong, but in the intermittent period affected by strong cold air, the frequency of southerly winds increases, accompanied by obvious warming process. Since the solar terms in beginning of spring, the time series has entered the spring. In nature and people's minds, "spring" means sunny weather and the revival of everything.

At the beginning of spring, the most striking feature of nature is that everything begins to show signs of recovery. The dividing line between beginning of spring and China in winter and spring (when the average temperature reaches 10 degrees Celsius for five consecutive days, it is regarded as spring), which is the first line from Guilin, Guangxi to Ganzhou, Jiangxi. In the area south of this line, early spring smells of spring, but 93% of the land in China is still winter, with long summer and spring, and Grain Rain is continuous.