Why is it so cold this year?

In the context of global warming, extreme weather often occurs, including extremely high-temperature heat waves, extremely low-temperature cold waves and blizzards. The general trend of climate change is global warming and high temperature, but in a certain period of time, extreme cold weather will still appear in some areas. For example, at the end of February 2004 and the beginning of 10 in 2005, and from the middle of 10 to the beginning of February in 2008, this persistent low-temperature freezing rain and snow weather occurred in China. This is mainly caused by the internal variability of atmospheric circulation and natural factors, but climate warming may also provide important background conditions. By analyzing the recent temperature and precipitation data, it is found that since late autumn of 2009, the northeast and north China are relatively cold, but the temperature in the south, northwest and southwest of the Yangtze River basin is generally high.

There is no contradiction between 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 in atmospheric and ocean circulation, can enhance this impact in some areas and weaken it in others. For example, in some parts of the Arctic, the western Arctic of Canada and Siberia have obviously warmed up. Although the eastern Arctic has also warmed up slightly in the past 50 years, the temperature in some areas has dropped. In addition to these regional changes, the average temperature in the Arctic has also increased significantly. Similarly, in the past few decades, the temperature in some areas of eastern Antarctica has decreased, but the temperature in the Antarctic Peninsula has increased significantly.

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