What does the cold wave mean?

Cold wave refers to the cold air coming from polar regions or cold zones in winter half a year, which invades the middle and low latitudes on a large scale like tides.

When a cold wave strikes, the temperature will drop sharply, accompanied by strong winds, rain and snow. It has a serious impact on industrial and agricultural production, people's lives and human health.

The cold wave invading China mainly broke out in the Arctic, Siberia, Russia and Mongolia. Most of these areas are located in the Arctic. In winter, there is no sunshine for a long time, and there is snow and ice everywhere.

The air mass staying in those areas seems to be lying in a large natural ice bank, and it is getting colder and colder. When this cold air mass accumulates to a certain extent and the air pressure in the south increases to a much higher level, it is like a flood stored in the mountains, which floods and pours to the south with lower air pressure, forming a cold wave.

Extended data:

Harm of cold wave

The cold wave is a large-scale weather process, and the large-scale snowfall brought by the cold wave will cause a large range of severe cooling, strong winds and snowfall along the way. Disasters such as gale, frost, snowstorm and rainstorm caused by cold wave have great influence on agriculture, transportation, electricity, navigation and people's health.

Cold wave and strong cold air usually bring strong winds and cool weather, which is the main disastrous weather in winter in China. Cold waves and strong winds pose a great threat to coastal areas.

The freezing rain, snow and ice weather brought by the cold wave is extremely harmful to transportation. For example, 1987 1 1 A cold wave process in the last ten days caused the turnouts of several stations under the jurisdiction of Harbin, Shenyang, Beijing and Urumqi to freeze, the tracks were buried by snow, communication signals failed, and traffic accidents increased significantly.

References:

Baidu encyclopedia-cold wave