Under what circumstances does extreme cold weather occur?

Lead: Extremely cold weather may bring strong winds or heavy snow, causing various transportation interruptions, power supply interruptions and natural gas supply shortages. Bian Xiao, some friends want to know why the extremely cold weather is coming. Under what circumstances does extreme cold weather occur? The following is worth reading.

Why did the extremely cold weather come?

The first reason is the change of air pressure over the North Pole, which is called the Arctic Oscillation. Under normal circumstances, there is a low pressure over the North Pole. The farther south, the higher the air pressure, and the higher the pressure, the lower the pressure. However, under abnormal circumstances, the low pressure over the North Pole will become higher, and the cold air over the North Pole will flow southward at this time.

The second reason is La Nina phenomenon, that is, anti-El Nino phenomenon. This phenomenon is that when the seawater temperature is different, the temperature difference of seawater will be accompanied by hurricanes, leading to extremely cold weather.

The third factor leading to extreme weather is global warming. Originally, the Arctic Ocean was covered by a huge ice sheet, but the temperature rose and the ice sheet melted, causing relatively high hot air on the sea surface to flow upward. With the atmospheric circulation, cold air will be squeezed to the south. If the first two factors are superimposed at this time, resulting in changes in air pressure and seawater temperature, it is likely to cause extremely cold weather.

Therefore, extreme cold weather is regarded as one of the natural disasters caused by global warming.

Extreme cold weather conditions in many countries

Italy: Some areas are covered with snow and ice. Due to snowfall, traffic in northern and central Italy was chaotic, and more than 600 passengers had to spend the night on the train. The cold killed a baby, a 76-year-old man and a tramp. According to the local meteorological observatory, this is the coldest winter in Italy in 27 years.

France: Cold warning issued in nearly half area. The army set up 600 shelters in Paris to take in the homeless.

Germany: snowfall continued in Berlin, and the temperature dropped to-10℃.

Belgium: A famous tourist attraction in Brussels, a sculpture of a child urinating, went on strike because of freezing caused by low temperature.

Poland: The temperature dropped to -32℃. Police said that 9 people were frozen to death on the 2nd, bringing the number of people frozen to death in Poland since last week's cooling to 29.

Ukraine: It is a country greatly affected by this cold current. According to the statistics released by the Ukrainian Ministry of Health on the 2nd, in the past week, 1 person froze to death in China, among which 64 people froze to death in the street and some died after being taken to hospital. The temperature dropped to -27℃ in Kiev, the capital, and below -30℃ in Carpathian Mountains. Tens of thousands of people have taken shelter from the cold in more than 2,000 temporary shelters.

Japan: In recent years, there have been severe snowstorms all over the country, and the snow in some areas even exceeds 5 meters. As of Tuesday, a snowstorm that lasted for several weeks in northern Japan triggered an avalanche, disrupted the transportation network and killed at least 56 people. Japan's Hokkaido and northern Honshu Island have been covered with thick snow. On the 2nd in Aomori, Japan, the temperature dropped to -9.2℃ and the snow depth reached 4.29 meters.

Romania, Serbia, Bulgaria and other European countries: * * At least 30 people died in cold weather, including 22 in Romania. In Sofia, Bulgaria, local media reported that the money in the ATM was frozen, causing the ATM to malfunction. The severe cold also caused some sections of the Danube to freeze. In order to protect ships, Bulgarian authorities had to transfer some ships to other ports. At least 10000 people in Serbia are trapped in remote villages due to traffic disruption. Some villages in Bosnia can only rely on military helicopters to drop food and other necessities. In Latvia, only 10 people froze to death in Riga, the capital, and the death toll in other areas remains to be counted. In Estonia, organizers had to stop holding ski competitions because the temperature dropped below MINUS 30 degrees.

Matters needing attention in extremely cold weather

1. First of all, try not to go out when the weather is particularly cold. At the same time, you need to keep a certain amount of exercise at home, so that you can keep warm better, especially in windy and snowy weather. There will be some danger when you go out.

2. For extremely cold weather, be sure to choose warm boots suitable for the temperature. As long as the lower body does enough warm work, it won't look so cold.

3, extremely cold weather, thick down jacket is essential, and it is best to choose a longer one, which also has a good effect on leg warmth. It won't be too cold with plush boots.

4. For friends who are afraid of the cold, although wearing a thick down jacket, you must wear a tight-fitting bottoming warm coat inside the down jacket to double the warmth and achieve a better warm effect.

5, for workers in special positions, must wear winter hat, masks, gloves, etc. To prevent frostbite in all parts of the body.

6. Due to the difference of personal physique, in extremely cold weather, you must add clothes according to your own situation, and you must not ignore the temperature for the sake of grace. As long as you keep warm enough, you can better show your unique charm and have a healthier body.