The weather in the north has changed a lot.

Because La Nina has affected the temperature in the north, it has dropped a lot.

As meteorologists have reminded, due to the influence of this strong cold air, the temperature in the northern region fluctuates greatly, so citizens should pay attention to adding clothes in time to prevent colds. In addition, the public in Northeast China, Inner Mongolia, Gansu, Ningxia, Shaanxi and other places need to guard against the adverse effects of low visibility weather such as snow, ice, wind, snow and dust on traffic. 2020 will be the coldest year. Meteorologists point out that these are just carefully edited rumors. The sudden drop in temperature during the National Day holiday is extremely confusing and makes many people believe it. Under the background of global warming, the factors affecting China's winter climate are more complicated. Whether it is cold or warm this winter needs to be comprehensively judged on the basis of scientific analysis.

Low temperature, rain, snow and freezing disasters affect a wide range, involving nearly two-thirds of provinces (autonomous regions and municipalities) in China, including 20 provinces (autonomous regions and municipalities) such as Guizhou, Hunan and Hubei. It snows heavily in many places in the south. On the one hand, it is not only caused by the low temperature of La Nina, but also coordinated with the water vapor in the south and influenced by the seasonal signals of the atmosphere. However, this does not mean that every time La Nina happens, there will be a large-scale snowstorm. In the context of global warming, the factors affecting winter climate are more complicated, not just La Nina events. "

Experts said that according to the prediction results of the climate numerical model developed by Nanjing University of Information Science & Technology, the south is warmer and drier this winter. ? In other words, the low temperature caused by La Nina event is not enough to offset the impact of global warming, so the average temperature may be higher. It is reported that since the beginning of this year, there have been many events affecting the climate around the world, such as the melting of Arctic sea ice and the change of snow cover in Europe and Asia. Climate change in specific areas still needs close attention. You can pay attention to the official climate forecast in time, and don't trust the information on the Internet.

Affected by the equatorial La Nina phenomenon in the Pacific Ocean and the abnormal atmospheric circulation in Europe and Asia, four rare large-scale low-temperature freezing weather occurred in southern China. According to the latest forecast of National Climate Center, La Nina will appear in the summer of 2008, which will lead to drought in spring and summer, high risk of forest fire, more sandstorms in northern China, and increased possibility of floods in summer. What does La Nina mean in Spanish? Little girl? , also known as anti-El Nino phenomenon, refers to the continuous cooling of seawater in the Pacific Ocean, the equator, the east and the middle, indicating that the surface temperature of seawater is lower than the climate average by more than 0.5 and lasts for more than 6 months. Hurricane, rainstorm and severe cold are the signs of La Nina phenomenon. Like El Nino, it will also cause serious global climate anomalies.