关键词: 沙坡头, 沙尘气溶胶, 沙尘暴

Abstract: The physical and chemical characteristics of mineral aerosols originated from desert area of northern China attracted more and more attentions in recent year, whereas most of studies are based on the short-term observation or typical dust events. In last three years, a long-term study on mass concentration of mineral aerosols was conducted using high-volume sampler and Anderson sampler in Shapotou, northeast fringe of Tengger Desert, China. The mass concentration of total suspended particle (TSP) show similar seasonal variation with dust deposition and close correlation with meteorological data, such as precipitation, days with dust storm and strong wind. On the average, the amount of TSP mass concentration shows different quantitative level during different weather condition, which are 10¹ μg·m³ in clear atmosphere, 10² μg·m³ under dust-suspended condition and 10³ μg·m³ during sand-blowing and dust-storm process. And it also be possible to reach 10³ μg·m³ during extra-strong dust-storm. The mass concentration-size distributions of mineral aerosols are distinct between clean atmosphere and dust storm.

Key words: Shapotou, sandy dust, dust storm