What are the characteristics of cold wave?

Cold wave characteristics: it has the weather characteristics of cold front crossing, mainly including strong wind, cooling, rain and snow. After crossing, the air pressure increases and the temperature decreases.

Cold waves generally occur in late autumn, winter and early spring. According to the regulations of China's meteorological department, if the temperature drop caused by cold air intrusion reaches more than 10℃ and the lowest temperature is lower than 5℃ in one day, it is called a cold wave process.

It has four levels, from weak to strong: blue, yellow, orange and red.

Cold wave anti-freezing measures

In addition to the above-mentioned strategic measures, various cold and antifreeze measures can be taken before and during the low temperature in winter. The government and relevant departments shall, in accordance with their duties, do a good job in emergency rescue against cold waves; Pay attention to cold and warmth; Agriculture, aquaculture, animal husbandry, etc. Anti-freezing measures should be actively taken to minimize losses and do a good job of wind protection.

Open air heating

Disturbing the inversion layer by arranging smoke piles, installing blowers and other conditions to increase the near-surface temperature has a significant warming effect on the near-surface layer, in which smoking can generally increase the near-surface layer temperature by 65438 0 ~ 2℃.