The Asian summer monsoon's large-scale convection rapidly transports boundary layer aerosols into the Asian summer monsoon anticyclone. Using the ECHAM6-HAMMOZ model, this study demonstrates that these aerosols are transported to the Arctic via the Brewer-Dobson Circulation (BDC). East and South Asian anthropogenic emissions significantly contribute to Arctic aerosol loading, causing negative net aerosol radiative forcing at the surface (-0.09 ± 0.02 Wm⁻² and -0.07 ± 0.02 Wm⁻², respectively). While East Asian aerosols (sulfate-rich) cause surface cooling (-0.56 K) and tropospheric cooling, South Asian aerosols (black carbon-rich) show minimal surface cooling and atmospheric warming. East Asian aerosol sources have the potential to counteract Arctic warming.

Suvarna Fadnavis, Sunil M. Sonbawne, Anton Laakso, Felix Ploeger, Alexandru Rap, Bernd Heinold, T. P. Sabin, Rolf Müller