The temperature drops suddenly, rain and snow come, how powerful is this all-round cold air?

From January 11 to 15, an all-around cold front will hit China, bringing a sharp drop in temperature, strong winds, and widespread rain and snow. What are the characteristics of an all-around cold front? How is it formed? Let's listen to the answer from Zhang Yingjuan, deputy director of the Climate Forecast and Assessment Office of the Beijing Climate Center .

What is all-around cold air?

"All-round cold air" means that the cold air is "all-round", as the name suggests. It has all the characteristics of cold air and can be said to be a cold air complex. Its characteristics are strong winds, large temperature drops, and a wide range of impact. It will also be accompanied by rain, snow, etc., and may meet the standards of cold waves in some areas.

What causes cold fronts? Why does the temperature also like to "ride a roller coaster"?

Cold air is a cold air mass with a very low temperature. This cold air mass is mostly formed in the polar regions and Siberia, and then moves southward to cause a sharp drop in temperature, rain and snow, etc. The cold air often mentioned from Siberia actually refers to the source of the cold air.

Siberia and the Arctic are very cold regions, where the temperature can generally reach dozens of degrees below zero. If the cold air comes from Siberia, the temperature of the area it passes through will drop sharply. This temperature difference can reach more than 10 degrees. Especially in winter, you may feel the feeling of spring turning into winter overnight, and the cold air will also be accompanied by weather changes such as rain or even snow. However, the intensity of the cold air is different each time. Sometimes it is strong, sometimes it is weak, and due to different movement paths, the affected range will also be different.

The temperature "roller coaster" means the temperature drops suddenly and rises sharply. This phenomenon usually occurs during the transition period of seasons. The well-known "late spring cold" is such a phenomenon. The late spring cold occurs in spring, which is the season when winter turns to summer. During the rapid rise of temperature in spring, cold air arrives, causing the temperature to drop suddenly.

What are the cold prevention precautions when the temperature drops sharply?

First of all, when traveling, add more clothes, pay attention to cold protection, and take precautions against respiratory, cardiovascular and cerebrovascular diseases. In rainy and snowy weather, be careful of slippery roads. In windy weather, do not stay in places with glass doors and windows, under big trees, billboards, etc.

Strong winds and cooling weather will have a very adverse impact on transportation, so the public who have travel plans are reminded to pay more attention to the forecast and warning information from the meteorological department and the road conditions information from the traffic management department, arrange their itinerary well, and travel smoothly and safely.

Secondly, at home, first, close doors and windows, take anti-freeze measures for water pipes, and heat your home, which increases the use of fire, electricity, and gas, so you should pay attention to the safety of electricity and gas. Second, if the indoor air circulation is not smooth, the risk of carbon monoxide poisoning accidents is high, so pay attention to strengthen prevention.

The third is production safety. Some construction projects are rushing to meet deadlines and meet progress, which poses hidden dangers to production safety. Coupled with the adverse weather conditions, the risk of safety accidents cannot be ignored.

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Planning/production: Cai Lin, Xiao Chunfang

Editor: Guru