Transboundary biomass-burning influence on springtime PM2.5 population exposure across southern China during 2015-2019.
BACKGROUND Every spring (March-April), biomass-burning fires in the Indo-China Peninsula (ICP) send smoke downwind into southern China, coinciding with elevated springtime PM2.5 in Yunnan, Guangxi, and Guangdong. The radiative and ecological effects of this transport are established, but its springtime population-expos...