How to ask God for the distribution of sandstorms in China?

The spatial distribution of sandstorms in China is 1, and the sand source distribution of sandstorms. The sand source areas of sandstorms are mainly distributed in Badain Jaran Desert, Tengger Desert, Taklimakan Desert, Wulanbuhe Desert and Mu Us Sandy Land in Hetao of the Yellow River in northwest China. Especially, Taklimakan Desert, Gurbantunggut Desert, Badain Jaran Desert and Tengger Desert are the main dust sources of sandstorms in China. The picture below shows the distribution map of the eight deserts in China. 2. Spatial distribution of sandstorm weather 1) Spatial distribution of sandstorm weather: The average annual number of sandstorm days in northwest China, most of North China, Qinghai-Tibet Plateau and Northeast Plain is generally greater than 1 day, which is the main impact area of sandstorm, and the average annual number of sandstorm days in most areas west of10e and south of Tianshan Mountain is greater than/kloc- The Tarim Basin and its surrounding areas, Alashan and the northeast of Hexi Corridor are the high frequency areas of sandstorms. The annual average number of sandstorms is more than 20 days, and some of them are close to or more than 30 days, such as 36 days in Minfeng, Xinjiang, 365,438+0 days in Keping and 30 days in Minqin, Gansu. The following figure shows the annual total number of sandstorms in China (average1956-2000). (2) Spatial distribution of sand-blowing weather: the influence of sand-blowing is wider than that of sandstorms, extending to the middle and lower reaches of the Yangtze River. Frequent areas with annual average sand blowing days ≥20 days cover most of northwest China, most of Qinghai-Tibet Plateau, central and western Inner Mongolia, Liaohe Plain and Haihe Plain, among which Tarim Basin and its surrounding areas, Alashan, Erdos and the eastern and northern Hexi Corridor are high-frequency sand blowing areas, with an annual average of more than 40 days, and some areas are close to or over 80 days, such as 96 days in Jilantai, 85 days in Yanchi, 93 days in Pishan, Xinjiang and 86,544 days in Minfeng. The following figure shows the distribution of total days of sand blowing in China (average 1956-2000). (3) The influence range of floating dust is wider, and its influence area extends to the Sichuan Basin and the north side of Nanling. Most areas prone to sandstorms and sand blowing belong to mid-latitude arid and semi-arid areas, which are seriously affected and endangered by desertification. The surface is mostly sandy land and dry land, with little vegetation and strong wind, which is easy to form sandstorm and sand blowing weather. 3. The general characteristics of sandstorm weather distribution in China: the influence area is large: 17, 25 and 27 provinces and cities are affected by sandstorm, sand blowing and floating dust to varying degrees. High frequency area concentration: the surrounding area of Tarim basin; Alashan Plateau, northeast of Hexi Corridor and its adjacent areas. It is closely related to desert and sandy land: desert and sandy land provide extremely rich material sources for sandstorm and sand blowing weather. Weather system, terrain trend, surface coverage and rainfall distribution all have significant effects on the geographical distribution of sand-dust weather.