China News Agency, Beijing, April 29 (Reporter Chen Su) Jia Xiaolong, deputy director of the China National Climate Center, said on the 29th that since this spring, the number of dust days in the north has been the most in the same period in the past 10 years, and strong dust storms have been more frequent than usual.
This spring, northern China suffered multiple rounds of sand and dust weather intrusion.
At the press conference of the China Meteorological Administration held that day, Jia Xiaolong introduced the sand and dust weather in this spring.
He said that since the spring of this year, the average number of dust-raising days and above in the northern region has been 1.7 days, the most since 2011.
Since the spring of this year, there have been 5 sand-dust weather events (floating sand and above) in the northern region, including 3 sand-dust storms and 2 strong sand-dust storms, slightly more than normal (1.1) in the same period of the year.
The intensity of sand and dust weather in March 2021 is relatively strong.
Speaking of the causes of the dust storm this spring, Jia Xiaolong said: First, the temperature in Mongolia and northwest China has been significantly higher recently. From last winter to early spring, the precipitation in most parts of Mongolia and northwest China was less than normal. The bare ground surface provides sand source conditions for the occurrence of sand and dust weather.
Second, since mid-March, the Mongolian cyclone has developed and moved eastward rapidly, and the mid-latitude circulation in Asia has experienced phased meridian circulation. Mongolia, Northwest China and the lower and middle layers of North China are all affected by the northwest wind anomaly, which is caused by sand and dust The transportation from the source to the southeast provides favorable power conditions and affects a large area of northern China.
Jia Xiaolong predicts that in May, most of Northwest China to western Inner Mongolia will have less precipitation, higher temperatures, and active cold air in stages. Sand and dust weather may still occur in the northern region. Pay attention to the impact of sand and dust weather on production and life.
This spring, in addition to more sandy and dusty weather, droughts in southern China are also continuing, with frequent extreme weather.
Jia Xiaolong said that under the background of global warming, disasters caused by extreme weather and climate in the future will become more and more intense, and the risks of disasters such as high temperature, floods, and drought will increase. It is expected that at least half of the summers may occur for a long time before and after 2024. High-temperature heat waves, the number of high-temperature heat waves may increase by three times by the end of this century. Global warming and frequent extreme weather events have important impacts on food production, water resources, ecosystems, and human health. Future climate changes may lead to more widespread Impact and risk.
"Extreme weather frequently warns us that we should scientifically respond to climate change, achieve global carbon neutrality as soon as possible, promote green and low-carbon development, maintain and practice multilateralism, and carry out international practical cooperation in the field of climate change." Jia Xiaolong said.
(Finish)