Temporal variability of tropospheric ozone and ozone profiles in the Korean Peninsula during the East Asian summer monsoon: insights from multiple measurements and reanalysis datasets

Abstract. We investigate the temporal variations of ground-level ozone and balloon-based profiles at Pohang (36.02? N, 129.23? E) in Korean Peninsula. Satellite measurements chemical reanalysis products are also intercompared to address their capability providing consistent information on vertical variability atmospheric ozone. Sub-seasonal summertime lower-tropospheric exhibit a bimodal pattern related weather patterns modulated by East Asian monsoon circulation. The peak abundances occur during pre-summer with enhanced formation due favorable meteorological conditions (dry sunny). Ozone concentrations reach minimum summer then re-emerge autumn before winter arrives. Profile indicate that is vertically mixed up 400 hPa summer, while impact dilution found 600 hPa. Compared satellite measurements, largely overestimate both troposphere stratosphere give inconsistent features variations. Nadir-viewing from Monitoring Instrument (OMI) slightly underestimate boundary layer but represent peaks lower interannual changes August well, higher strong El Niño events low 2020 La Niña event.