What is the phenomenon that the weather is particularly cold this year?

1, La Nina phenomenon: When La Nina phenomenon occurs, the meridional degree of the circulation in the middle and high latitudes in Europe and Asia is large, and the cold air activity is also strong, so the temperature in most parts of central and eastern China is easy to be low.

2. Less Arctic sea ice: Arctic sea ice is rarely conducive to the strong ridge of high pressure in Urals Mountain in winter and the strong wind in East Asia in winter, and the temperature in most parts of central and eastern China is easily lower than normal.

Related news:

As early as the beginning of May, 2020, meteorological scientists can roughly predict this winter.

At that time, scientists observed the El Ni? o phenomenon that lasted for more than five months-the last winter was a "warm winter", which was largely affected by El Ni? o, and in the whole summer of 2020, meteorological events (including a series of meteorological disasters) in Asia, Europe and America were more or less related to it.

La Nina is often accompanied by El Nino. At the beginning of 2020 10, the Japan Meteorological Administration released a message, and they observed that La Nina phenomenon has formed, which is likely to run through the whole winter in the northern hemisphere.

La Nina means "little girl" in Spanish, also known as anti-El Ni? o phenomenon, which refers to the phenomenon that the sea water in the eastern and central equatorial Pacific Ocean is unusually cold in a large area, which shows that the surface temperature of the sea water is lower than the climate average by more than 0.5 and lasts for more than 6 months. La Nina phenomenon is marked by hurricane, rainstorm and severe cold, which, together with El Ni? o phenomenon, will cause serious global climate anomalies.

The influence of La Nina phenomenon generally includes making the southwest of the United States and the west coast of South America unusually dry, making the precipitation in southeast Asia such as Australia, Indonesia, Malaysia and the Philippines unusually high, and making the west coast and southeast coast of Africa, Japan, Korean Peninsula and other northeast Asia extremely cold.