Abstract : according to the observation of the number concentration spectrum and the mass concentration of atmospheric aerosol , tsp and its particle size distribution , micrometeorology , and the solar spectroscopic radiation , even the neutron activation treatment of sand dust samples in helan mountainous area , the formation law of sandstrom , dust and sand blowing weather and the characteristics of climatic variation in this area and the influence of helan mountain are counted and analysed 文摘:利用贺兰山地区沙尘暴历史资料和综合观测资料，对大气背景、浮尘、扬沙和沙尘暴发生期间的大气气溶胶数浓度谱、质量谱、大气总悬浮颗粒( tsp )及粒径分布、微气象、分光日射观测以及沙尘样品进行中子活化处理，分析了该地区浮尘、扬沙和沙尘暴形成规律，气候变化特征和贺兰山的影响。
2.
According to the observation of the number concentration spectrum and the mass concentration of atmospheric aerosol , tsp and its particle size distribution , micrometeorology , and the solar spectroscopic radiation , even the neutron activation treatment of sand dust samples in helan mountainous area , the formation law of sandstrom , dust and sand blowing weather and the characteristics of climatic variation in this area and the influence of helan mountain are counted and analysed 利用贺兰山地区沙尘暴历史资料和综合观测资料，对大气背景、浮尘、扬沙和沙尘暴发生期间的大气气溶胶数浓度谱、质量谱、大气总悬浮颗粒( tsp )及粒径分布、微气象、分光日射观测以及沙尘样品进行中子活化处理，分析了该地区浮尘、扬沙和沙尘暴形成规律，气候变化特征和贺兰山的影响。
