The cold wave blue warning is coming again. What impact will this cold wave bring to life?
First, the definition of cold wave
After the cold air passes through a certain area, the temperature drops above 8℃ within 24 hours, and the minimum temperature drops below 4℃. Or the temperature drops 10℃ or above within 48 hours, and the minimum temperature drops below 4℃; Or within 72 hours, the temperature drops continuously by more than 65438 02℃, and the lowest temperature is below 4℃.
Second, what is a cold wave?
The so-called cold wave is a weather process in which cold air from the north invades China on a large scale, resulting in a large-scale sharp cooling and northerly winds. 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 above 8℃ and the lowest temperature is below 4℃ in one day, it is called cold wave process. It can be seen that not every cold air heading south is called a cold wave.
Third, how is the cold wave formed?
In the Arctic, due to the weak sunlight, the ground and the atmosphere get less heat, and it snows all year round. In winter, the direct sunlight passes through the equator and reaches the southern hemisphere. The arctic region is colder and wider, and the temperature is generally below MINUS 40℃-50℃. Large-scale cold air masses gather to a certain extent, and under the action of suitable high-altitude circulation, they will invade southward on a large scale, forming cold wave weather.
Fourth, the cold wave affects all aspects.
Cold wave is a large-scale weather process, which will cause a wide range of severe cooling, strong winds and snowfall along the way. Disasters caused by cold wave, such as gale, frost, snowstorm, etc., have great influence on agriculture, transportation, electricity, navigation and people's health.
Five, the impact of the cold wave on various industries
1, the impact of cold wave on agriculture;
The cold wave has the greatest impact on agriculture. When the strong cooling it brings exceeds the cold tolerance of crops, it will cause freezing damage to crops.
2. The impact of cold wave on traffic:
Cold wave and strong cold air usually bring strong wind, cooling, freezing rain and snow, which has a serious impact on traffic.
3. The influence of cold wave on electric power:
The freezing rain weather brought by cold wave will cause the lines to be covered by rain, and the biggest harm of rain is to interrupt the power supply lines.
4. The influence of cold wave on shipping:
When a cold wave strikes, maritime shipping is often forced to stop, and the strong wind it causes will bring a storm surge at sea and only destroy ships at sea.
Precautionary measures of intransitive verbs
1. In case of cold wave warning, ships on rivers, lakes and seas should return to port in time to anchor;
2. During the gale, pedestrians should pay attention to riding bicycles as little as possible, and don't stay near billboards and temporary structures;
3, pay attention to keep warm and protect the nose and mouth, wind cooling is easy to cause respiratory tract, cardiovascular and cerebrovascular diseases.
4. In rural areas, we should pay attention to keeping vegetables warm and freezing, and strengthen the construction of greenhouse facilities.
The arrival of the cold wave has a great influence, a wide range of influence and a great possibility of disaster. Only by taking countermeasures in advance can we minimize the impact of the cold wave and avoid its wide-ranging impact.