26 Jul 2022
26 Jul 2022
Status: this preprint is currently under review for the journal ACP.

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

Juseon Bak1, Eun-Ji Song1,a, Hyo-Jung Lee1, Xiong Liu2, Ja-Ho Koo3, Joowan Kim4, Wonbae Jeon1,5, Jae-Hwan Kim5, and Cheol-Hee Kim1,5 Juseon Bak et al.
  • 1Institute of Environmental Studies, Pusan National University, Busan, South Korea
  • 2Smithsonian Astrophysical Observatory (SAO), Center for Astrophysics | Harvard & Smithsonian
  • 3Department of Atmospheric Sciences, Yonsei University, Seoul, Republic of Korea
  • 4Department of Atmospheric Sciences, Kongju National University, Kongju, South Korea
  • 5Department of Atmospheric Sciences, Pusan National University, Busan, South Korea
  • acurrently at: Department of Environmental Atmospheric Sciences, Pukyong National University, Busan, South Korea

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

Juseon Bak et al.

Status: open (until 06 Sep 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Juseon Bak et al.

Juseon Bak et al.


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Short summary
Our study investigates the temporal variations of ozone profiles in the troposphere and lower stratosphere at Pohang in Korean Peninsula from multiple ozone products. We discussed the quantitative relationships between daily surface measurements and key meteorological variables, different seasonality of ozone in the lower troposphere from upper troposphere, and interannual changes of the lower tropospheric ozone, linked by the Asian monsoon driven weather pattern.