Chunri handwritten newspaper

Spring is one of the four seasons, between beginning of spring and Long Summer, including solar terms such as beginning of spring, rain, fright, vernal equinox, Qingming and Grain Rain. Spring represents warmth and growth. In spring, the qi of yin and yang begins to change, and everything germinates and grows with the rise of yang. Spring is a period of alternating winter and summer monsoon, with cold air and warm and humid air alternating.

In spring, the northern hemisphere of the earth began to tilt towards the sun, receiving more and more direct sunlight, so the temperature began to rise. In spring, plants begin to sprout and grow, and many flowers bloom. Hibernating animals wake up, many animals with eggs for the winter hatch, and birds begin to migrate, leaving the wintering ground for breeding grounds. Many animals are in estrus during this period, so China also calls spring the season of "the revival of everything". Because hot air began to move northward, while cold air often lingered, in addition, the temperatures of land, water and air all rose at different speeds. From the meteorological point of view, China belongs to the monsoon climate zone, and spring is the period of alternating winter and summer monsoon, so the cold air and warm and humid air flow are changing, and they do not give in to each other. In the southern region, a cold air intrudes every three to five days in spring, and meets with the southwest warm and humid airflow, forming rainy weather. Spring is rainy season in many places in southern China, but it is rainy and dry in northern China. There are often strong storms in Europe and tornadoes in North America.

Spring is the first season of the year. Since the solar terms in beginning of spring, the time series has entered the spring, which represents warmth and growth. Beginning of spring is the time when the sun be the spirit was born, and everything gradually recovered. Spring has begun. In nature, the most striking feature is that everything is beginning to show signs of recovery. In beginning of spring, you can obviously feel the breath of early spring in the Tropic of Cancer and its south of China. In most parts of northern Israel, it can only be said that it is a prelude to entering spring. Everything has not been restored, or in the winter when everything is closed. For the area north of the Tropic of Cancer, the farther away from the Tropic of Cancer (where the Yellow River meets the pond), the later the spring comes. Because of China's vast territory, large span from north to south and different natural rhythms, "beginning of spring" is only a prelude to spring in many areas.

There are many ways to divide the four seasons. In daily life, people usually regard the arrival of beginning of spring solar terms as beginning of spring, and beginning of spring is defined from the perspective of astronomy. Meteorological departments generally divide the solar calendar into four seasons, and March-May is spring. However, this division method has a disadvantage for some places. According to this method, March in the south of China belongs to spring. At this time, of course, the Yangtze River valley is pink and green, and it is spring. However, Heilongjiang Province is still freezing cold and snowy. Therefore, meteorologists have formulated a standard to divide the four seasons according to the temperature change, that is, the five-day average temperature. When the average temperature of five days after winter passes 10℃ stably, it begins to enter spring, and when the temperature is higher than 22℃, it means late spring and early summer.