This year is the coldest weather.

The feeling of going out today is very direct? Are you frozen silly? According to field monitoring, the temperature in most parts of Beijing Plain is about-18℃ at 19. Among them, the observatory-17.9℃ exceeded the extreme minimum temperature of 65438+(- 16.7℃) in recent 20 years.

What is the wind-cold effect?

The wind-cold effect refers to the warmth and coldness that people feel, but it is actually the somatosensory temperature, which is mainly affected by several factors.

The first is the temperature. If the temperature is low, it will definitely feel cold. The second is the influence of wind speed. The body is constant temperature, and it heats itself. If the wind is strong, it will take away a lot of heat from our bodies, so we will feel that the temperature is lower than the actual temperature. The third is humidity. If the humidity in the air is particularly small, it will feel better. If the air humidity is high in winter, it will take away more heat. Compared with the north, the temperature in the south is actually not that low now, but many people are frostbitten. Why? This is because of the high humidity. ? Zhang Mingying explained that another point is that the somatosensory temperature will also be affected by solar radiation. The temperature is very low, such as today, but I feel better in sunny places. If you go to a shady place, you will feel particularly cold immediately.

Is it cold this winter?

Since winter, three waves of cold waves have affected our country. Is it cold this winter?

In fact, from the long-term climatic data, Beijing was quite cold in the winters of 1950s, 1960s and 1970s, even lower than the current temperature. 1966 February minimum temperature -27.4℃.

What is a cold wave?

The cold wave is generally sudden, accompanied by strong winds and severe cooling, and the cooling range should reach a certain standard. The cold wave standard in China's national standard of cold air grade is that after cold air passes through a certain area, the temperature drops above 8℃ within 24 hours, the lowest temperature is below 4℃, or above 10℃ within 48 hours, and continuously below 4℃ or above 12℃ within 72 hours.

Where does the cold wave come from

The atmosphere is moving, and cold air will not gather in the Arctic honestly. With the atmospheric fluctuation and atmospheric circulation, cold air will move back and forth from north to south, and the south will affect the southern latitude area. When it gathers to a certain extent and its intensity is particularly strong, it will form cold wave weather.

What are the characteristics of this cold wave?

Before the arrival of the cold wave, the meteorological department issued a notice that by 10, three waves of cold air will come one after another.

This time, the intensity of cold air is relatively strong, and the temperature at high altitude is particularly low. About 5 kilometers above sea level, the temperature reaches-55℃; At the altitude of 1500 meters, the temperature also reached MINUS 20 degrees Celsius, so the whole cold air temperature was low. In addition, it covers a wide range, from 5000 meters to the ground, and it is a thick cold air mass.

In addition, cold air moves slowly and lasts for a long time. Generally, cold air continuously affects Beijing for about 3 days, and then gradually shrinks northward, moves eastward, and begins to break away.