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Wildfire-emitted aerosols modulate lightning occurrence and ignition potential in the boreal forest of Northeast China
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Wildfire-emitted aerosols modulate lightning occurrence and ignition potential in the boreal forest of Northeast China
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Journal Article
Wildfire-emitted aerosols modulate lightning occurrence and ignition potential in the boreal forest of Northeast China
2026
Overview
Wildfire-released greenhouse gases and aerosols accelerate global warming and exacerbate air pollution, substantially altering atmospheric composition and cloud microphysical properties. These alterations directly influence the formation of cloud-to-ground (CG) lightning and the subsequent regime of lightning-ignited wildfires (LIWs). However, significant knowledge gaps persist regarding these processes in boreal forests, the world’s largest and most LIW-prone biome. This study integrates high-resolution datasets on CG lightning, aerosol loading, LIWs, and meteorology from the Greater Khingan Mountains forests in Northeast China to elucidate their interconnections. The results indicate that LIW emissions are associated with pronounced spatiotemporal variations in aerosol loading, and that elevated aerosol levels, dominated by sulfate, coincide with enhanced CG lightning occurrence. This phenomenon is likely modulated by aerosol–cloud–convection interactions, whereby aerosols modify cloud microphysics and intensify atmospheric electrification. Furthermore, high aerosol loading co-occurs with near-surface meteorological conditions conducive to LIW ignition and spread, suggesting a potential positive feedback mechanism. This hypothesized cycle, linking wildfire emissions, CG lightning, and subsequent ignitions, may become self-reinforcing under a warming climate.
