Why is it so cold in the spring of 21?

Under the background of global warming, extreme weather often occurs, including high-temperature heat wave with extremely high temperature, cold wave with extremely low temperature and blizzard. The general trend of climate change is global warming and high temperature, but in a certain period of time, extreme cold weather will still occur in some areas. For example, at the end of December 24 and the beginning of January 25, and from mid-January to early February 28, this kind of persistent cold, rain, snow and freezing weather appeared in China. This is mainly caused by internal variation factors of atmospheric circulation and natural factors, but climate warming may also provide an important background condition. By analyzing the recent data of temperature and precipitation, it is found that the northeast and north China have been relatively cold since the late autumn of 29, but the temperature in the south of the Yangtze River basin, northwest and southwest China is generally high.

there is no contradiction between the cooling in a certain area and global warming. The increase of greenhouse gas concentration has a global impact on climate, but other factors such as natural factors, local feedback and regional changes of atmospheric and ocean circulation can enhance this effect in some areas and weaken it in other areas. For example, in some parts of the Arctic, the western Arctic of Canada and Siberia have significantly warmed up. Although the eastern Arctic has also slightly warmed up in the past 5 years, the temperature in some areas has decreased. In addition to these regional changes, the average temperature in the Arctic has increased significantly. Similarly, the temperature in some areas of eastern Antarctica has decreased in the past few decades, but the temperature in the Antarctic Peninsula has increased significantly.

Therefore, under the global warming environment, there will be cold periods in some areas; In warm winter, there will also be cold weather.