What is the reason for the extreme cold wave next year?

What is the reason for the extreme cold wave next year?

What is the reason for the extreme cold wave next year? The National Climate Center predicts that the cold air that affects China this winter will be frequent and strong, and the temperature in the central and eastern regions of China will be mainly cold. What is the reason for the extreme cold wave next year?

What is the reason for the extreme cold wave next year? 1 According to the news of China Meteorological News Agency, recently, the cold wave brought "cliff-like" strong cooling and extensive rain and snow weather. Some people question whether this violent cold wave is "hitting the face" for global warming.

In this regard, Zhou Bing, chief expert of climate service of the National Climate Center, said that it is in the context of global warming that the frequency and intensity of extreme weather events such as high temperature heat waves, droughts, floods, typhoons and cold waves have increased. Global warming leads to more unstable climate and increased intensity of extreme cold events.

At present, the general trend of global warming has not changed. According to the Global Climate Statement 2020 issued by the World Meteorological Organization, 2020 is one of the three years with the highest global average temperature on record. The past five years (20 16-2020) and the past ten years (20 1 1-2020) are the hottest five years and ten years on record, respectively. Since 1980s, since 1850, each successive decade has been hotter than the previous one.

Is the average temperature in China still rising this year? Is it expected to be very cold this winter?

Zhou Bing said that China is a country with a remarkable monsoon climate. Winter is influenced by the East Asian winter monsoon, and strong cold air from polar regions or middle and high latitudes will affect China through multiple paths. According to the statistics of National Climate Center, the air activity was obvious in the year of La Nina event. The National Climate Center predicts that the cold air activities affecting China this winter will be frequent and strong, and the temperature in the central and eastern regions will be mainly cold.

This winter, the cold air affecting China is frequent and strong, which is not contradictory to the global warming trend. Since the beginning of this year, the weather and climate in China have been complicated and abnormal. As of 10 year1October 27th, the national average temperature (12.7℃) is higher than that of the previous year 1. 1℃, which is the highest in the same period in history since 196 1 year. Climate warming is still the main theme of climate change in China and the world.

Global warming has changed the characteristics of global atmospheric circulation, and affected local climate through the interaction between air and sea. In addition, arctic warming is also an important reason for extremely cold weather. It is expected that the cold air activity will be significantly strengthened from June 5438 to February next year, and the temperature in most parts of the central and eastern regions may be lower than that in the same period of the previous year, so there is a greater possibility of staged extreme cold wave events. All localities should continue to guard against the adverse effects of low-temperature weather, do a good job in dispatching and supplying energy such as coal, electricity, oil and gas, do a good job in ensuring Spring Festival travel rush, and strengthen fire prevention in forests, grasslands and urban-rural fringe areas.

What is the reason for the extreme cold wave next year? This round of heavy snowfall is caused by the rapid development of several weather systems and the fierce intersection of cold and warm air.

165438+1On October 7-8, the heavy snowfall caused by this cold wave was mainly concentrated in Shandong, Hebei, Inner Mongolia and Northeast China. Among them, some areas in southeastern Inner Mongolia, central Liaoning and western Jilin have heavy snowstorms.

Meteorologists predict that by the night of the 8th, the thickness of newly added snow in Inner Mongolia and Northeast China will reach 10 to 20 cm, and the local area will reach more than 40 cm.

At present, the Liaoning Meteorological Bureau has issued a red warning of snowstorm, especially since the night of the 7th, the rare weather of "freezing rain+blizzard" has come to Shenyang, with the snow thickness reaching 10 to15cm. The Meteorological Observatory of Inner Mongolia Autonomous Region released the blizzard red warning signal on August 8th 10: 50, and there was a heavy snowstorm in Tongliao City, with the thickness of snow exceeding 65cm.

Why is the snowfall in Northeast China and Inner Mongolia so heavy and the thickness of snow so deep?

Zhou analyzed that, in general, this is caused by the rapid development of several weather systems and the fierce intersection of cold and warm air. Specifically, at the height of 500hPa, the northeast cold vortex develops strongly, and the low trough moves eastward and northward, which leads to the explosive development of surface cyclones and forms a deep low-pressure system from low to high, which has strong dynamic uplift conditions; At the same time, the southwest airflow transported enough warm and humid air to the northeast, and the water vapor was extremely strong.

On the one hand, there is strong dynamic uplift and water vapor convergence; On the other hand, the system moves slowly and the snowfall lasts for a long time, so there is an obvious process of rain and snow cooling.

Zhang Guilian added that the thickness of snow is also related to the temperature and the moisture content of snowflakes. For example, the thickness of snow per unit precipitation will change obviously with temperature. When the temperature reaches -6℃ to -8℃, the snow depth per unit snowfall will reach the maximum. With the increase of temperature, the depth of snow per unit snowfall will decrease obviously. During the snowfall, the water vapor condition is good and the temperature is suitable, so the thickness of snow is also deep.

What are the reasons for the extreme cold wave next year or what residents need to pay attention to?

We know that the future weather will always be in an extreme cold wave. What problems should we pay attention to at this time? Actually, this is very important. Under the extreme cold wave, if you don't pay attention, the loss will still be great. Among them, we should pay attention to the following three points.

One of the main reasons is to prevent the adverse effects of low temperature weather, because when the cold wave comes, it will bring various effects, including heavy rain, blizzard and freezing. In these cases, we need to pay attention at all times. It is very unsafe to go out in this situation, so it is necessary to prevent the impact of the cold wave.

Prepare materials for winter use. With the coming of this winter, the temperature will drop to extremely low. In addition, the shortage of coal and other winter resources in September this year led to an increase in coal prices. However, under the relevant control of the state, it has been well controlled and the supply is slowly increasing. However, you should prepare yourself and reserve some at home for the winter.

Pay attention to fire prevention in forests and urban and rural areas. In the south, although it gets cold, it is actually very dry. Unlike the northern region, when the cold wave comes, it will be accompanied by rain and snow. At this time, the south is dry and cold, and it is also very easy to get angry. Therefore, we should pay attention to the corresponding preparations and do a good job in fire prevention in rural grasslands and urban and rural areas.