Is it cold or warm this year?

In the winter of 2023 (12, 2023-February 2024), the temperature in most parts of China is close to normal or on the high side, but it may be cold in stages in the northeast, northern and southwestern Xinjiang and the eastern part of northwest China, which is a cold winter. Global climate change is one of the important factors affecting the cold degree in winter.

With the global temperature rising, there are more and more extreme cold weather events, such as the cold wave that hit Europe in June 5438+ 10 in 2023 and the snowstorm that hit the United States in February 2023. These extreme cold weather events have seriously affected the local economy and society. In addition, global climate change will also affect the atmospheric circulation and ocean circulation, and then affect the strong wind and snowfall in winter. For example, global warming leads to obvious warming in the Arctic region and enhanced Arctic oscillation, which may lead to more severe winters in Europe and North America.

Introduction of winter climate characteristics in China:

It is warm in the south and cold in the north, and the temperature difference between the north and the south is large, which is the geographical distribution characteristics of winter temperature in China. Take the average temperature of 65438+ 10 in Leng Yue, China as an example. The 0℃ isotherm is distributed along the southeastern margin of Huaihe-Qinling-Qinghai-Tibet Plateau. The temperature to the north of this line is below 0℃, and the farther north, the lower the temperature. The temperature in Mohe, Heilongjiang is below -30℃, which is the lowest temperature in China. The temperature in the south of the line is above 0℃, in Nanling Mountain area it is around 8℃, and in Sanya, Hainan, it is above 20℃.

In winter, the sun shines directly in the southern hemisphere, and less heat is gained by solar radiation. At the same time, the latitude span between north and south in China is large, and the height difference between north and south is significant. In addition, winter in China is influenced by winter winds, and there are often cold and dry winter winds from Mongolia and Siberia, and the northern region bears the brunt. In the south, the influence of cold air has been greatly weakened due to the blocking of cold air from east to west in Qinling Mountains and Nanling Mountains, and the southern region is often affected by warm and humid airflow from the ocean, thus further aggravating the temperature difference between north and south.