Global Impact of Lightning?Produced Oxidants

Lightning plays a major role in tropospheric oxidation, and its on modulating chemistry was thought to be emissions of nitrogen oxides (NOx). Recent field laboratory measurements demonstrate that lightning generates extremely large amounts oxidants, including hydrogen (HOx) O3. Here, we implement these lightning-produced oxidants global chemical transport model examine impact composition. We find can increase mass weighted OH by 0.3%–10% affect CO, O3, reactive substantially, depending the emission strength from lightning. Our work highlights importance uncertainties as well need for rethinking oxidation chemistry.