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[MIS09-08] Occurrence of micro-meso scale dust storms and its relationship to the vegetation and topography in Mongolian grassland and Gobi Desert
Keywords:Asian dust, Himawari-8 Dust RGB, Hotspot of dust storms
The vegetation had a suppression effect on the dust emission. Number concentrations of coarse particles (1-10μm) decreased from the desert to the grassland. They had significant negative correlations with the vegetation (NDVI) from 3μm to 10μm, but the number concentration at 0.3 – 0.5 μm had little correlation to the vegetation.
During the moving observations, we found a hotspot of dust storms in the Gobi Desert. An analysis of Himawari-8 Dust RGB clearly shows that the hotspot appeared at a jointing point of two valleys, a bottleneck and an exit of a valley.
In summary, the horizontal distribution of number concentrations of aerosol particles reflected the surface vegetation. Locations of the hotspot were determined by a local topography such a jointing point of two valleys.