Observational researches on sand aerosol size distribution in Helanshan area

摘要

Dust and sand phenomena (dust, sand blowing and sand storm) frequently occur in Helanshan area, northwest China. It is one of the natural disasters in northwest China. It can make a great economic loss and kill people sometimes, especially when black storm occurs, it also pollutes atmospheric environment, so many scientists concerns on its formation mechanism. We made comprehensive measurements about dust and sand phenomena on April and May during 1996-1999. We only focus on sand aerosol size distribution in this paper.