关键词: 沙尘暴, TSP浓度, 沙尘源, 内蒙古

Abstract: With TH-1000 air collection instrument we successively observed the TSP mass concentration of Alashazuoqi, Baotou, Hohhot, Siziwangqi, Jining, Huade, Erenhot and Sonidyouqi in Inner Mongolia during a sand-dust storm on April 6th to 7th of 2001. In combining with the routine weather observation data a comprehensive analysis was conducted. The results showed that the temporal and spatial distribution of TSP was apparently various in the process of sand-dust storm. The minimum TSP was 1.896 mg·m-3, the maximum was 52.153 mg·m-3 and the average was 13.399 mg·m-3. The sandstorms in west Inner Mongolia are transported from long distance dust resource in remote Mongolia, while sandstorms in central Inner Mongolia depend on local dust rising. The most significant sand-dust source in this case was the desertified grassland in central Inner Mongolia, partly derived from the degeneration of grassland in west-central Inner Mongolia. Comparing with the maximal TSP mass concentration coming from the anthropogenic source which occurred at the city (Hohhot) in winter, the TSP mass concentration in this case was 10~52 times of that, so the pollution from the sand-dust storm is much more badly.

Key words: sand-dust storm, TSP mass, dust resource, Inner Mongolia