Abstract
Asian dust (yellow sand) is mostly produced over Govi and Taklimakan region and transported by the Jet Stream toward Japan from the former region. A proper estimation method of source area of dust outbreaks will be better for operational estimation of dust transport to Japan. This study examined correlation between the threshold wind speed of dust outbreak and the subsurface soil moisture condition, and developed regression formula of the two quantities. It was examined how the method for dust outbreak decision by comparison with estimated threshold wind speed and actual wind speed was effective, using the regression formula incorporating thermal inertia estimated with actual satellite and surface observation data.
