Global Biomass Burning Emission Contributions to Ice Nucleating Particles

Abstract Biomass burning (BB) can produce ice nucleating particles (INPs) and influence cloud ice formation and climate effects, but the distribution and budget of BB‐induced INPs are not well understood. This study quantified INPs from BB at −17°C to −30°C and explored their spatiotemporal distributions. The results indicate that the INPs of BB aerosol were 5.42 × 10 21 in 2019, approximately two orders of magnitude lower than those of dust aerosol, but much more than those of marine organic aerosol. Globally, INPs from BB were mainly influenced by wildfires, but in regions like East Asia, residential BB contributed significantly, accounting for about 57%. INPs from BB would have more pronounced effects in high latitudes of the Northern Hemisphere and parts of the Southern Hemisphere, particularly during peak wildfire periods. Thus, BB should be unignorable in evaluating the fates and impacts of INPs.