Is it cold in 2024? Is it cold winter or warm winter?

The Spring Festival in 2024 is a cold winter.

The main reason is this year's "La Nina Year". The so-called La Nina year means that the probability of cold in winter in the south is higher than that in the north, so it is easy to have extreme cold. Under the background of global warming, the frequency of warm winters has increased since 1986. In the winter after La Nina, the temperature was very low for several years.

The main characteristics of abnormal winter temperature are: the temperature in most parts of the country is lower than normal, especially in northern North China, southern Northeast China, most of southern China, eastern and northern Southwest China and most of northwest China.

After La Nina incident, the winter precipitation in China mainly shows as follows: the precipitation in a large range is less, especially in the eastern part of Northeast China, along the middle and lower reaches of the Yangtze River, in the southern part of Southwest China and in northern Xinjiang. There is more precipitation in the north of southwest China and the east of northwest China.

It should be noted that La Nina event is only one of the external forcing factors that affect the winter climate in China. The winter climate in China is also influenced by Arctic sea ice, Eurasian snow and other factors, and the natural variability within the atmospheric system also plays an important role.

Introduction of Winter Climate Characteristics in 2024

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 roughly distributed from Huaihe River to Qinling Mountain to the southeast edge of 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.