Global tropospheric ozone responses to reduced NOx emissions linked to the COVID-19 worldwide lockdowns
Abstract Efforts to stem the transmission of coronavirus disease 2019 (COVID-19) led to rapid, global ancillary reductions in air pollutant emissions. Here, we quantify the impact on tropospheric ozone using a multiconstituent chemical data assimilation system. Anthropogenic NO x emissions dropped by at least 15% globally and 18 to 25% regionally in April and May 2020, which decreased free tropospheric ozone by up to 5 parts per billion, consistent with independent satellite observations. The g...
United States United Kingdom Propulsion Laboratory Japan Agency For Marine Space Administration European Commission
Source: sciencemag.org