Why is it snowing heavily in many places this year? Isn't the temperature always rising? Can this explain whether the environment is getting better or worse?

Meteorologists reveal: Why did a rare snowstorm break out in China?

A rare snowstorm has continued since the founding of New China. In the context of global warming, why is there such a large range of snowfall and low temperature weather in China? Experts from China Meteorological Bureau predicted the reason.

Xinhua News The rare snowstorm has continued since the founding of New China. In the context of global warming, why is there such a large range of snowfall and low temperature weather in China? The reporter interviewed relevant experts from China Meteorological Bureau.

Continuous snowfall once in a hundred years.

According to the latest data provided by the Forecast and Disaster Reduction Department of China Meteorological Bureau, from June 5438+1October 10 to 28 this year, the precipitation in nine provinces such as Hubei has exceeded 20 years, including once in 50 years in Sichuan, once in 70 years in Shaanxi and once in 0/00 in Gansu and Qinghai.

Judging from the duration of snowfall, from June 65438+1October 10 to August 28, the snowfall days in Jiangxi, Hunan and other provinces 1 1 provinces are all more than once in 20 years, of which Henan, Shaanxi, Gansu, Qinghai and Shanxi are more than once in a hundred years, and Anhui.

Abnormal atmospheric circulation is the "culprit"

"The direct cause of the recent rain and snow weather is abnormal atmospheric circulation," said Sun Jun, chief forecaster of the Central Meteorological Observatory.

This year's atmospheric circulation anomaly is related to the "La Nina event" that is taking place in the equatorial Middle East Pacific. Li Weijing, deputy director of the National Climate Center, said that from the perspective of climate change, the current low temperature in the equatorial Middle East Pacific is one of the manifestations of the "La Nina" phenomenon. Statistical analysis shows that the meridional dimension of mid-latitude atmospheric circulation may be strengthened in the winter of the year and the spring of the following year when the strong La Nina event occurred, that is, frequent cold air activities may easily lead to low temperature in most parts of northern and eastern China and more precipitation in the north of the Yangtze River.

Why is this year's heavy snow so slow to "recede"? Experts attribute the reason to the stability of atmospheric circulation. Sun Jun said: "It is precisely because of the stable atmospheric circulation during this period that the warm and humid airflow and cold air in the southwest have been around 30 degrees north latitude, especially in the middle and lower reaches of the Yangtze River, so there will be no obvious turning point in the recent rain and snow weather."

What's the future weather trend?

Experts from the Central Meteorological Observatory provided reporters with the latest forecast results of future weather:

In the next three days, due to the combined influence of cold air and southwest warm and humid airflow, rain and snow will continue in most parts of the south, and heavy snowfall will continue in some parts of southern Hunan; There are moderate to heavy rains in parts of southern Jiangnan, northern and western South China, and heavy rains in some areas; Rain and snow will continue in the eastern part of the Qinghai-Tibet Plateau, the southeastern part of the northwest and the southwest. Freezing rain will continue in parts of central and southern Guizhou, central and southern Hunan, central Jiangxi and northwestern Guangxi.

How to face extreme weather

If it is in the north of China, this large-scale snowfall is not unusual in terms of snowfall and duration, but it has caused disasters once in decades or even once in a hundred years in some areas in the south. Experts believe that the main reason is that the cold protection mechanism in the vast areas of the south is relatively weak.

Li Weijing suggested that in the context of global warming, in addition to strengthening the establishment of a cold-proof mechanism in the southern region and actively taking disaster prevention measures, it is also necessary to raise public awareness of extreme weather and climate events such as blizzard and take active and effective countermeasures as soon as possible.

He believes that in response to extreme weather, the meteorological department has the responsibility to do a good job in monitoring and analysis, forecasting and early warning and disaster impact assessment of low-temperature rain, snow and freezing weather. However, under the influence of global climate change, the factors of snow and ice disasters are complex, and it is more difficult to forecast rain and snow.

[Related News] Forecast: A new round of rain, snow and freezing weather will have an impact on the whole country.

According to the news, it is said. Com, influenced by cold air and re-intensified southwest warm and humid air flow, it is predicted that from1October 65438+ to 3 1, most of southern China will once again experience an obvious freezing process of low temperature rain and snow. There are heavy snow and local snowstorms in parts of eastern Tibet, northwestern Yunnan, southern Hubei, central and northern Hunan, northwestern Jiangxi, central and northern Zhejiang, southern Jiangsu, Anhui and other places; There are freezing rains in parts of central and southern Guizhou, central Hunan and central Jiangxi; There are heavy rains in parts of southern Jiangnan and northern South China, and there are heavy rains in some areas. [detailed]