OBSERVATIONAL STUDIES ON SAND-DUST STORM IN HELAN MOUNTAINOUS AREA*

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  • According to the observation of the number and mass concentration spectra of atmosphericaerosols,the total suspended particulates (TSP) and their size distribution,micrometeorology,and the solar spectroscopic radiation,even neutron activation treatment of sand dust samples inHelan Mountainous area.the formation law of floating dust,blowing sand and sandstorm weatherand the characteristics of climatic variation in this area and the influence of the Helan Mountain arecounted and analyzed.In addition,the spectrum characteristics,optical depth and chemicalcomposition of sand aerosol particles are also analyzed and discussed.
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