What is the lowest temperature in cold wave weather? How cold is it?

Lead: According to statistics, the cold wave basically occurs between September of each year and May of the following year, among which March, 10 and10 are the most frequent seasons of cold wave weather. So, how cold is the cold wave weather? What is the lowest temperature in cold wave weather? I hope the answers collected by Bian Xiao can help everyone.

How cold is the cold wave weather?

Cold wave weather refers to a wide range of strong cooling, strong winds and rain and snow weather. Generally speaking, the cold wave standards adopted in the north are: the temperature drops 10℃ or above within 24 hours, or the temperature drops 12℃ or above within 48 hours, and the lowest temperature is below 4℃; The cold wave standard adopted in South China is: the temperature drops above 8℃ within 24 hours, or above 10℃ within 48 hours, and the lowest temperature is below 5℃.

The cold wave invading China mainly broke out in the Arctic, Siberia 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 masses staying in these areas are getting colder and drier. When this cold air mass accumulates to a certain extent and the air pressure increases to a level much higher than that in the south, it is like a flood stored in a mountain. At the first opportunity, it floods to the south with lower air pressure, forming a cold wave.

Located in the Arctic, Siberia, Mongolia Plateau, Yukon Plateau and Hudson Bay at high latitudes, the ground receives little heat from the sun all year round. Especially in winter, the direct sunlight moves south, and the angle of sunlight in the northern hemisphere is getting smaller and smaller. So the ground absorbs less and less sunlight heat, and the surface temperature becomes very low. In the Arctic Ocean in winter, the temperature is often below -20℃, and the lowest can reach -60℃ ~-70℃. 5438+ 10 The average temperature in June is often below -40℃.

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 average temperature is generally below 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.

How to keep healthy in cold weather

eat

Eating more foods rich in calories and fat, other foods rich in iron and iodine, such as mushrooms, beans, vegetables, fruits, ginger, peppers, etc., will help to enhance cold and warmth.

penetrate

You can't let these eight places freeze in winter: ① Warm your head: wear a hat; 2 warm nose: thumb massage the bridge of the nose and nose wing; 3 warm ears: wear ear bags and hats; 4 keep your neck warm: prepare a scarf; 5 warm waist: add clothes in time and cover the quilt to sleep; 6 warm back: put on more clothes to bask in the sun; ⑦ Keep your knees warm: wear knee pads and do not exercise excessively; 8 warm feet: soak your feet more.

on one's pins

Try to keep the room temperature above 65438 08℃. Bedding should be dry, soft and comfortable. Turn on the electric blanket 1 hour before going to bed, and sleep after the quilt is warm.

Cars mainly pay attention to the cold weather.

1. Check the whole vehicle before driving.

The car should start like this.

At low temperature, the correct response is: it is best to control the starting time of the vehicle within 5 seconds. If you fail three times, stop for a few minutes before starting again to avoid damaging the battery.

Due to the cold temperature in winter, lubricating oil will not flow easily due to the increase of viscosity. After starting the engine, you should drive slowly to warm up. In addition, the preheating time does not need to be too long, as long as the thermometer pointer starts to rise.

3. Pay special attention to the control of vehicle speed.

When driving, it is best to use the engine to slow down, and less to use the brakes to slow down, so as not to change the driving trajectory and cause the vehicle to sideslip.

4. When turning, appropriately increase the turning radius.

When turning in winter, it is necessary to appropriately increase the turning radius of the vehicle before turning, and don't slam the steering wheel when turning to avoid slipping.