Main influencing factors of winter temperature distribution characteristics in China

The main influencing factors of winter temperature distribution in China are geographical location, topography, ocean influence and atmospheric circulation.

Data expansion:

I. Geographical location

China is located in the eastern part of the East Asian continent, between north latitude 18 ~ 53 and east longitude 73 ~ 135. Geographical location determines the overall characteristics of winter temperature distribution in China. The northern region is located in high latitudes and inland areas, showing a cold and dry climate, while the southern region is closer to the tropics, with a warmer and wetter climate.

In winter, the temperature in China is lower than that in the same latitude area, 15~20℃ in Northeast China, 10~ 15℃ in Huanghuai area, 6~ 10℃ in Jiangnan area and about 5℃ in South China. The winter temperature in central and eastern China is generally cold, and the temperature and humidity fluctuate greatly between seasons.

In winter, the temperatures in Northeast China, North China, Inner Mongolia, Huanghuai, Jianghuai, Jianghan, northern Jiangnan, eastern Southwest China, most of Northwest China and most of Xinjiang are lower than normal.

Second, the terrain.

China has a vast territory and complex terrain, which has an important influence on the temperature distribution in winter. For example, the western plateau has high altitude, complex terrain and generally low temperature in winter; The southeast coastal area has low altitude and relatively high temperature. Topographic features such as mountains, plains and rivers will also have a significant impact on the formation and distribution of wind direction, wind speed and temperature field.

Three. Ocean influence

China is surrounded by a vast ocean, which has a significant impact on the distribution of winter temperature. The southeast coast is affected by the warm ocean airflow, and the temperature is relatively high in winter; On the other hand, the northern coast is affected by cold ocean air mass and cold air, and the temperature is low in winter.

Four. atmospheric circulation

Atmospheric circulation is one of the key factors of temperature distribution in winter. Winter in mid-latitude area is mainly affected by westerly belt and monsoon. The westerly belt will bring cold air and cool weather, which will lower the temperature in the northern region; Monsoon affects the southeast coastal areas, making them warmer and wetter in winter.

To sum up, the distribution characteristics of winter temperature in China are mainly influenced by geographical location, topography, ocean and atmospheric circulation. These factors determine the winter temperature distribution pattern and climate characteristics in different regions of China.