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Total ozone characteristics associated with regional meteorology in West Antarctica

机译：南极洲西部与区域气象学有关的总臭氧特征

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摘要

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.
机译：我们与周围的气象因素相比，研究了南极洲西部（韦德尔海附近）的总臭氧柱（TOC）的特征。在此分析中，我们使用了地面和卫星TOC测量以及来自重新分析数据的气象学（气温，潜在涡度和风场）。 TOC的长期格局显示出较大的逐年变化（例如，与世宗大王的200 DU最大相似），但是最近有稳定的恢复趋势。尽管格局总体上是一致的，但南极西部春季期间的南极西部的TOC在高纬度地区和低纬度地区之间没有很好的相关性。这一结果表明，臭氧空洞面积在南极西部具有空间变化。南极西部周围的TOC模式与气温有很好的相关性，但存在垂直差异。在较低的平流层中出现高正相关（在接近50-100 hPa高度时最大R> 0.9），表明在较冷的条件下臭氧消耗增加，而在较高的平流层中出现负相关（最低的R <-0.8与5-10相似） hPa高度）与臭氧化学反应的温度相关性。 TOC还显示出与潜在涡度的有趣关系：南极平流层在平流层较高的正相关性（最大R> 0.9，与500-600 K高度相似），而平流层下部的中等正相关性（最小R < -0.6在类似于南方夏季的300-350 K高）。这种奇特的模式可能与平流层中的极涡旋增强和对流层顶附近的平流层中心点对流层气团交换有关。与风场也存在一些相关性（R =类似于0.4-0.6），显示出空气质量混合效应。这些发现表明，气象对南极西部TOC的时空格局有很大影响。

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