It's cold and windy in December, and it's cold to the end!The world is in Frozen Mode, are you ready?
In the past two days, with the southward movement of the cold wave and the head-on collision of warm and humid airflows, a wide range of rain and snow has been carried out in the central and eastern regions. For example, the monitoring data of the ** meteorological observatory shows that since yesterday, there has been snowfall or sleet, rain to snow in central Inner Mongolia, central and northern Shaanxi, Shanxi, Hebei, Beijing, Tianjin, most of Shandong, central and northern Henan, and heavy to heavy snowfall in some areasFreezing rain occurred in parts of central and western Henan and western Shandong.
1. The national cold wave is coming, and large-scale snowfall.
As of 8 p.m. on December 14, snow depth in six counties and cities in Shandong and Hebei hit a historical extremeAccording to incomplete statistics, a total of 55 stations hit the December extreme snow depth;Beijing reached 11 centimeters, the second deepest snow in December since the founding of the People's Republic of China.
Second, the reason behind the cold wave.
Global warming is one of the main causes of frequent cold waves. As the Earth's temperature rises, glaciers in the polar regions melt, releasing large amounts of cold air. These cold airs meet warm air as they move south, creating a massive cold wave.
According to the analysis data, the Arctic Oscillation changed abnormally from late November to early December and turned into a strong negative value, which means that the high-pressure area in the Arctic region is developing rapidly and the Arctic vortex is beginning to become unstable. As a result, this year's Arctic vortex began to show anomalies in early December, and its center also shifted, causing cold air from the Arctic to continue southward, forming waves of cold waves. From December to the present, China has experienced two cold wave processes, which occurred on December 9-11, December 13-17, and the second time that it is currently heading south. It is estimated that the whole month of December will be spent in the cold!
3. Deal with cold waves.
Warm measures: Keeping warm is crucial in cold weather. We can wear thick down jackets, sweaters, and thermal underwear, as well as warm items such as hats, gloves, and scarves. In addition, heating equipment such as hot water bottles and electric blankets are also good choices.
Health protection: In cold weather, the body's resistance is easy to decrease, and it is easy to contract colds and other diseases. Therefore, we need to maintain indoor ventilation, frequent hand washing, wearing masks and other hygienic Xi. At the same time, exercise appropriately to enhance the body's immunity.
Agricultural production: For agricultural production, cold spells may have some impact on crops. Farmers can improve the cold resistance of crops by covering the film and increasing the amount of fertilizer. At the same time, arrange the planting time reasonably and avoid agricultural activities such as sowing and transplanting during the cold wave.
IV. Conclusion. 
Although the cold winter has brought severe cold and challenges, it has also brought us a different scenery and life experience. In this frozen world, we need to maintain a positive mindset and the ability to act to meet various challenges. Let's spend a warm and pleasant winter together!