Interannual Variability of Dust Deposition in Japan during Spring Season and Related Atmospheric Circulation Fields

Mineral dust affects health, climate, and ecosystems in various ways. East Asia is one of the major sources mineral world. This study examines year-to-year variability deposition over Japan April from perspective large-scale atmospheric circulations using aerosol reanalysis datasets for period 2011 to 2017. The increased explained by intensified transport Mongolian Plateau anomalous westerly winds associated with a deepened trough Asian continent toward northwest Japanese islands middle lower troposphere. enhanced emission Gobi Desert extratropical cyclone activity are consistent larger-than-normal amount Asia. Comparing depositions western northern Japan, it suggested that slightly different positions may determine whether or not large carried. A further analysis long-term (1967-2022) observation data supports importance continent. Dust flux decomposed into cyclonic anticyclonic components showed both vortices contribute eastward These results suggest events their affected stationary circulation anomaly as well baroclinic instability waves including transient cyclones anticyclones.