Cctv newsAccording to @ Central Meteorological Observatory Weibo, there have been eight sandstorm weather processes in China since this year, which is the most in the past 10 years. The main features are that the sandstorm weather appears early, the processes are frequent and the processes are concentrated since March.
Appear early. The first sandstorm weather process this year occurred on January 12th, 32 days earlier than the first process in normal years.
There are many dust processes. Since the beginning of this year, there have been 8 sandstorm weather processes in China, 2 times more than the same period of the previous year (6 times); It is the most in the same period in the past 10 years, and the fourth in the same period in the past 20 years, less than in 2001 (12 times), 2002 (10 times) and 2004 (10 times).
The process has been concentrated since March. Since March, there have been six sandstorm weather processes in China, one more than the same period of the previous year (5 times); Two times more than the same period in the past 10 years (four times), second only to the same period in 2010 (eight times), and the same as the same period in 2018.
Many sandstorms originated in Mongolia. The tracking and monitoring of the origin track of dust by meteorological satellite shows that the two strongest dust processes (March 19-23 and April 9-13) this year mainly originated in Mongolia, and the main sand source is more than 600 kilometers away from Beijing, which is affected by transmission, resulting in the continuous air quality in Beijing reaching a serious pollution level.
According to historical statistics, from 2000 to 2022, there were 307 dust storms in China, with an average annual occurrence of 13.35 times, with the least occurrence in 2014 (7 times) and the most occurrence in 2001 (22 times). After 2011, the frequency and intensity of dust storms decreased significantly, with an average of 11.17 times in 2011-2022 and an average of 3 times in the dust storm process. More than 70% of the dusty weather in China occurs in spring, of which April is the most frequent month, followed by March and May.
