202 1 Why is it so cold?

Since the beginning of winter, the middle and high latitudes in Europe and Asia have been controlled by the meridional circulation of "high in the west and low in the east", and the winter monsoon in East Asia is strong. This circulation pattern has not changed much in June 5438+February. The continuous meridional circulation of "high in the west and low in the east" and the continuous strong winter wind are the direct reasons for the low temperature in most parts of central and eastern China since 65438+February 2020.

In addition, La Nina, which is about to reach its peak in the equatorial Middle East and Pacific Ocean, and the lack of Arctic sea ice in autumn are two signals that cannot be ignored. Historical statistical analysis shows that in most winters of La Nina, the meridional dimension of the atmospheric circulation in the middle and high latitudes in Europe and Asia is greater, and the cold air activities affecting China are more frequent and stronger than normal, and the probability of the temperature being lower than normal in most parts of central and eastern China is also greater.

Extended data:

Most areas in the north continue to be vulnerable to "frostbite or freezing". The lowest temperatures in Beijing, Tianjin, Hebei, Shanxi, Hohhot, Changchun, Shenyang and other places will hit a new low since this winter, and all cotton-padded clothes and trousers will be "covered", and those with down trousers will also come in handy; Most of the "frozen and silly" areas in the south have obviously expanded, and the "frozen crying line" continues to press south. The highest temperatures in Jiangsu, Shanghai, Anhui and Hubei are all below freezing point, which will hit a new low since this winter. The lowest temperature in Jiangsu and other places will approach-10℃, full of freezing feeling.

654381October 8, South China will continue to "freeze and cry", especially in Guangdong and Guangxi. For example, the lowest temperature in Guangzhou and Nanning is only about 4-5℃. Except for cooling in parts of South China and Yunnan, the temperature in most other parts of the country will start to rise.

China Net -202 1 The first cold wave warning came.