The role of natural factors in constraining long-term tropospheric ozone trends over Southern China

Southern China has experienced severe photochemical pollution events in recent years, and the tropospheric ozone has emerged as the major pollutant of concern. Despite some recent efforts, the role of natural factors in constraining long-term trends of ozone in this region is poorly understood. In this study, we addressed this issue using tropospheric column ozone (TCO) datasets (2005–2017) from the Ozone Monitoring Instrument/Microwave Limb...