Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11017749 | Atmospheric Environment | 2018 | 11 Pages |
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 â¼200 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 Râ¯>â¯0.9â¯at â¼50-100â¯hPa height) showing enhanced ozone depletion in colder conditions, but negative correlations appeared in the upper stratosphere (minimum Râ¯<â¯â0.8â¯at â¼5-10â¯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 Râ¯>â¯0.9â¯at â¼500-600â¯K height) during the austral spring but a moderately negative correlation in the lower stratosphere (minimum Râ¯<â¯â0.6â¯at â¼300-350â¯K height) during the austral summer. This peculiar pattern probably relates to the polar vortex intensification in the stratosphere and the stratosphere-troposphere airmass exchange near the tropopause. There were also some correlations with wind field (Râ¯=â¯â¼0.4-0.6) showing air-mass mixing effects. These findings indicate a large meteorological influence on the spatiotemporal pattern of the TOC in West Antarctica.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Atmospheric Science
Authors
Ja-Ho Koo, Taejin Choi, Hana Lee, Jaemin Kim, Dha Hyun Ahn, Jhoon Kim, Young-Ha Kim, Changhyun Yoo, Hyunkee Hong, Kyung-Jung Moon, Yun Gon Lee,