The Analysis of Sand-Dust Aerosol Characters in Tarim Basin

Sand dust is the normal weather phenomenon in Tarim basin region,the analysis of sand dust aerosol indicated that its concentration during sand-dust storm is much more larger than that during non-sand dust storm period.The concentration of small granule of sand dust aerosol increased largely and its containt also increased quickly.The comparative concentration of small granule (3.3um)and big granule(3.3um) increased quickly.Because the sand resources were plentiful,and most of them were small materials so they were the main resources of sand dust aerosol. The distributions of Aluminum etc.elements in aerosol spectrum have one peak at Akesu station.The peak positions were in the range 4.7-7.0 um.The resulf of Enrichment factor analysis indicated that the crust element concentration in sand-dust storm were higher than that in floating dust and background atmosphere.The crust elements had the highest concentration when all kinds of sand weather happened.