Ozone variability related to the East Asian Summer Monsoon over Korean peninsula using multi-satellite and reanalysis data

Ozone plays two opposite roles in Earth environment: stratospheric ozone protects earths life from harmful ultraviolet (UV) rays whereas the tropospheric ozone damages atmospheric system as an air pollutant as well as a greenhouse gas. This stratospheric ozone is not directly emitted to the atmosphere, but formed through the photochemical reaction which splits molecular oxygen (O2) by strong UV strikes in the stratosphere and nitrogen dioxide by the visible lights below 420 nm and then atom oxygen is bumped into the molecular oxygen to yield ozone. This photochemical production has been strongly affected by the human activities damaging the protective layer of the stratosphere due to the emission of CFCs and halogen gases as well as boosting the ground-level ozone pollution due to the emission of ozone precursors (CO, VOCs, NOX). On the other hand, both the tropospheric and stratospheric ozone are complicatedly interacted with atmospheric circulation and climate changes. For instance, recent study shows that the Asian summer monsoon flow transports either clean-air over the Bay of Bengal or polluted air over India to the global stratosphere over the Tibetan Plateau region as well as the long-range transport of air pollutants from East Asia to the global troposphere (Liu et al., 2009). These ozone transport processes make it difficult to identify the ozone changes by the emission control policies both for reducing the ozone pollution and healing the ozone hole. This study clarifies ozone variability effected East Asia Summer Monsoon, focusing on the Korean Peninsula where Asian Summer Monsoon Chemical and Climate Impact Project (ACCLIP) campaign will be performed during the period Jul 15th to August 31th in 2022. We evaluated whether the reanalysis data and remote-sensing data could represent a consistent ozone profile distribution using MERRA-2 reanalysis data and satellite measurements (OMPS, MLS, OMI, IASI). EOF analysis of ozone profile is performed and ozone profile variability associated with EASM is shown. EASM impacts on ozone variability will be discussed.