Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0394.1 |
Observed Changes in the Southern Hemispheric Circulation in May | |
Ivy, Diane J.1; Hilgenbrink, Casey2; Kinnison, Doug3; Plumb, R. Alan1; Sheshadri, Aditi4; Solomon, Susan1; Thompson, David W. J.5 | |
2017 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Much research has focused on trends in the Southern Hemispheric circulation in austral summer (December-February) in the troposphere and stratosphere, whereas changes in other seasons have received less attention. Here the seasonality and structure of observed changes in tropospheric and stratospheric winds, temperature, and ozone over the Southern Hemisphere are examined. It is found that statistically significant trends similar to those of the Antarctic summer season are also observed since 1979 in austral fall, particularly May, and are strongest over the Pacific sector of the hemisphere. Evidence is provided for a significant shift in the position of the jet in May over the Pacific, and it is shown that the strengthening and shifting of the jet has rendered the latitudinal distribution of upper-tropospheric zonal wind more bimodal. The Antarctic ozone hole has cooled the lower stratosphere and strengthened the polar vortex. While the mechanism and timing are not fully understood, the ozone hole has been identified as a key driver of the summer season tropospheric circulation changes in several previous observational and modeling studies. It is found here that significant ozone depletion and associated polar cooling also occur in the lower most stratosphere and tropopause region through austral fall, with spatial patterns that are coincident with the observed changes in stratospheric circulation. It is also shown that radiatively driven temperature changes associated with the observed ozone depletion in May represent a substantial portion of the observed May cooling in the lowermost stratosphere, suggesting a potential for contribution to the circulation changes. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000391856300006 |
WOS关键词 | RELATIVELY SIMPLE AGCM ; AMUNDSEN SEA ; ANNULAR MODE ; TRENDS ; OZONE ; VARIABILITY ; DYNAMICS ; IMPACT |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21272 |
专题 | 气候变化 |
作者单位 | 1.MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA USA; 2.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA; 3.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; 4.Columbia Univ, Dept Appl Phys & Appl Math, New York, NY USA; 5.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA |
推荐引用方式 GB/T 7714 | Ivy, Diane J.,Hilgenbrink, Casey,Kinnison, Doug,et al. Observed Changes in the Southern Hemispheric Circulation in May[J]. JOURNAL OF CLIMATE,2017,30(2). |
APA | Ivy, Diane J..,Hilgenbrink, Casey.,Kinnison, Doug.,Plumb, R. Alan.,Sheshadri, Aditi.,...&Thompson, David W. J..(2017).Observed Changes in the Southern Hemispheric Circulation in May.JOURNAL OF CLIMATE,30(2). |
MLA | Ivy, Diane J.,et al."Observed Changes in the Southern Hemispheric Circulation in May".JOURNAL OF CLIMATE 30.2(2017). |
条目包含的文件 | 条目无相关文件。 |
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