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
<p>We investigate the temporal variations of ground-level ozone and balloon-based ozone profiles at Pohang (36.02<span class="inline-formula"><sup>∘</sup></span> N, 129.23<span class="inline-formula"><sup>∘</sup></span> E) in...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2022-11-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/22/14177/2022/acp-22-14177-2022.pdf |
| Summary: | <p>We investigate the temporal variations of ground-level ozone and
balloon-based ozone profiles at Pohang (36.02<span class="inline-formula"><sup>∘</sup></span> N, 129.23<span class="inline-formula"><sup>∘</sup></span> E) in
the Korean Peninsula. Satellite measurements and chemical reanalysis products
are also intercompared to address their capability of providing 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 their
minimum during the summer monsoon and then re-emerge in autumn before the
winter monsoon arrives. Profile measurements indicate that ground-level
ozone is vertically mixed up to 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 the 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 represent the bimodal peaks of ozone in the lower troposphere and
the interannual changes in the lower-tropospheric ozone in August well, with
higher ozone concentrations during strong El Niño events and low
ozone concentrations during the 2020 La Niña event.</p> |
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| ISSN: | 1680-7316 1680-7324 |