Analysis of Spatial and Temporal Distribution Characteristics of Dust Storm in Inner Mongolia in Recent 30 Years

In this study, using the technology of statistical and geographic information system as the main research methods study characteristics of temporal and spatial distribution of Sandstorm in Inner Mongolia, by analyzing from the characteristics of a wide range of dust weather and through on a longer time scale dust storms moving path of observation and statistical analysis, has important scientific significance and research value. The results showed that: (1) in the recent 35 years, the number of sand dust storm days in Inner Mongolia showed a decreasing trend. Among them, the change of each time, the main high frequency hair period for 1980s and twenty-first Century. (2) in recent 30 years in Inner Mongolia 42 stations in 1981-2014 spatial distribution characteristics of sandstorm is decreasing from west to east. 1980-1999 sandstorms in Inner Mongolia high frequency area mainly concentrated in the Alashan Guaizi lake and Haili (two; in 2000 after the territory of Inner Mongolia appeared new sandstorm frequently occurred region, Inner Mongolia Sonid Left Banner, Xilin Gol League and the surrounding area. In 2001-2014 sand dust storm high incidence area mainly in Guaizi lake, Haili of Sonid Left Banner, as the center. The number of sand dust storms occurred in the three regions accounted for 90% of the frequency of the region, which accounted for 12 of the sites in Xilinguole Meng, the number of days accounted for more than 50%. This and the characteristics of the underlying surface and climate conditions have close relationship, the area of desert sand, gale, multiple and wind speed is high, vegetation coverage is low; occurs in eastern Inner Mongolia and northeast area is the minimum number of times, namely Hulunbeier and Hinggan League, where vegetation cover is good, the average annual rainfall of highest surface sand is not easy to wind was blowing and causing sandstorms.