The impact of land surface condition and wind on Asian dust over the south Korea

Dust storms frequently occur in northeast Asia during springtime. Soil wetness and wind are important controls on dust activities. Regional studies suggest that land-surface characteristics, such as the nature of the vegetation cover and soil moisture are important controls on dust emission (Wyatt and Nicking, 1997; Gillette, 1999). Vegetation is considered to be one of the main factors affecting dust emission and dust storm occurrence. Higher vegetation cover results in higher surface roughness length and less dust emission, thereby reducing dust storm occurrence. This study was investigated the occurrence day of the Asian dust in the South Korea and the relationship between climate factors and the Asian dust days in the South Korea. This study was used the monthly NDVI, PDSI, soil moisture, precipitation, Ω-wind, u-wind, and v-wind. The source regions of the Asian dust over the South Korea are divided Gobi, Inner-Mongolia, and Loess plateau. The relationship between Asian dust days of Korea and land surface conditions of the source regions was no significant. The wind is more important than land surface conditions.