Since the beginning of spring, the temperature in which cities in China has increased?

Beginning of spring is not only the first of the 24 solar terms, but also the first solar term in nature and people's minds. Spring? It means warm weather, birds singing, fragrant flowers, and everything growing and sowing in spring. A year's plan lies in spring? .

In the early spring, in the tropic of cancer and its vicinity, the weather is warm, everything begins to grow, temperature, sunshine, rainfall and so on. Often at the turning point of the year, it tends to rise or increase, and it can be clearly felt that the days are getting longer and the sun is getting warmer. Since the beginning of the beginning of spring solar term, westerly jet, the southern branch of East Asia, began to weaken, but the strength and position of westerly jet, the northern branch of East Asia, 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.

China has a vast territory, mainly located in the middle and low latitudes. Low latitude refers to the spatial range between 30 degrees north and south latitude on the earth's surface, that is, 30? N to 30? The area within the southern latitude, including tropical and subtropical hot areas, is the area where global solar radiation and heat are concentrated. In low latitudes, it is rainy, stormy, sunny and humid. With the change of seasons, rainfall, illumination and storms change obviously. Mid-latitude is the latitude zone between 30 and 60 degrees north latitude. The air masses prevailing in high and low latitudes overlap with each other, with frequent cyclone activities and large temperature difference, and the temperature changes obviously when the seasons change. The climate varies greatly at different latitudes.

The beginning of spring? This is a seasonal solar term, which marks the beginning of spring and represents warmth and growth. The geographical dividing line between winter and spring is on the line from Guilin, Guangxi to Ganzhou, Jiangxi. When spring begins to celebrate festivals, the area south of this line has the smell of spring. Beginning of spring is a solar term with a slight turning point, which is not obvious in the whole country. ? Four stands? It marks the rotation of four seasons, and reflects the laws of phenology and climate change such as spring, summer, autumn and winter, winter storage, sunshine, rainfall and temperature. After beginning of spring, the spirit of the sun began to rise, the sunshine increased, and the days became longer, which meant that the winter when everything was hidden ended and the growing season began. Everything gradually recovered and the weather began to get warmer. Only Lingnan in the south really enters the spring during the festival, and the breath of early spring has come to my face; In the north, everything is still bleak, and it is still snowing in some places. Beginning of spring, more can only be said to be a prelude to spring, has not yet entered the spring. China has a vast territory, complicated geographical conditions and great differences in climate. Standing? Specific climatic significance does not apply to all parts of the country. Although seasonal changes can reflect the climate (temperature) characteristics of the four seasons in the middle and lower reaches of the Yellow River, but? Standing? The specific phenological and climatic significance is not significant.