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Total ozone characteristics associated with regional meteorology in West Antarctica

Title
Total ozone characteristics associated with regional meteorology in West Antarctica
Authors
Koo, Ja-HoChoi, TaejinLee, HanaKim, JaeminAhn, Dha HyunKim, JhoonKim, Young-HaYoo, ChanghyunHong, HyunkeeMoon, Kyung-JungLee, Yun Gon
Ewha Authors
유창현
SCOPUS Author ID
유창현scopus
Issue Date
2018
Journal Title
ATMOSPHERIC ENVIRONMENT
ISSN
1352-2310JCR Link

1873-2844JCR Link
Citation
ATMOSPHERIC ENVIRONMENT vol. 195, pp. 78 - 88
Keywords
Total ozone columnWest AntarcticaWeddell seaPolar vortex
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
We investigated the characteristics of the total ozone column (TOC) around West Antarctica (near the Weddell Sea) compared with ambient meteorological factors. For this analysis, we used ground-based and satellite TOC measurements as well as meteorology (air temperature, potential vorticity and wind field) from reanalysis data. Long-term patterns of TOC show the large year-to-year variation (e.g., maximumly similar to 200 DU at King Sejong) but a steady recovering trend recently. Despite a generally consistent pattern, the TOC around West Antarctica did not correlate well between high- and low-latitude regions during austral spring; this result implies that the ozone hole area had a spatial variation over West Antarctica. The TOC pattern around West Antarctica correlated well with air temperature but showed a vertical difference; high positive correlations appeared in the lower stratosphere (maximumly R > 0.9 at similar to 50-100 hPa height) showing enhanced ozone depletion in colder conditions, but negative correlations appeared in the upper stratosphere (minimum R < -0.8 at similar to 5-10 hPa height) associated with the temperature dependence of ozone chemistry. The TOC also showed an interesting relationship to the potential vorticity: high positive correlation in the upper stratosphere (maximumly R > 0.9 at similar to 500-600 K height) during the austral spring but a moderately negative correlation in the lower stratosphere (minimum R < -0.6 at similar to 300-350 K height) during the austral summer. This peculiar pattern probably relates to the polar vortex intensification in the stratosphere and the stratosphere center dot troposphere airmass exchange near the tropopause. There were also some correlations with wind field (R = similar to 0.4-0.6) showing air-mass mixing effects. These findings indicate a large meteorological influence on the spatiotemporal pattern of the TOC in West Antarctica.
DOI
10.1016/j.atmosenv.2018.09.056
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일반대학원 > 대기과학공학과 > Journal papers
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