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DOI | 10.1017/S0954102018000433 |
Changes in the Atlantic Sector of the Southern Ocean estimated from the CESM Last Millennium Ensemble | |
Wainer, Ilana1; Gent, Peter R.2 | |
发表日期 | 2019 |
ISSN | 0954-1020 |
EISSN | 1365-2079 |
卷号 | 31期号:1页码:37-51 |
英文摘要 | The changes in the Antarctic Circumpolar Current system associated with the Polar, sub-Antarctic and Subtropical Fronts in the Atlantic are examined in a ten-member ensemble using the Community Earth System Model. Results for the ensemble average mean show that the Polar Front at 25 degrees W shifts to the south by 0.8 degrees during 1970-2000 compared to its mean latitude over the period 1050-1950. This shift is significant because it is more than twice the standard deviation of the mean latitude time series during 1050-1950. The shift is caused by a slight southward displacement of the Antarctic Circumpolar Current, which in turn is caused by a southward shift in the latitude of the maximum zonal wind stress. The sub-Antarctic Front also shows a small southward shift after 1970, with a maximum latitudinal displacement of 0.2 degrees. However, this shift is not significant compared to the standard deviation of the time series during 1050-1950. The Subtropical Front does not change its latitude during 1970-2000 compared to 1050-2000 because there is very little change in the wind-stress curl in the subtropics. Differences in temperature and salinity throughout the water column at 25 degrees W reveal that during 1970-2000 there is freshening of Antarctic Intermediate Water, whereas the Circumpolar Deep Water becomes saltier. |
WOS研究方向 | Environmental Sciences & Ecology ; Physical Geography ; Geology |
来源期刊 | ANTARCTIC SCIENCE |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/92857 |
作者单位 | 1.Univ Sao Paulo, Oceanog Inst, BR-05508120 Sao Paulo, SP, Brazil; 2.Natl Ctr Atmospher Res, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Wainer, Ilana,Gent, Peter R.. Changes in the Atlantic Sector of the Southern Ocean estimated from the CESM Last Millennium Ensemble[J],2019,31(1):37-51. |
APA | Wainer, Ilana,&Gent, Peter R..(2019).Changes in the Atlantic Sector of the Southern Ocean estimated from the CESM Last Millennium Ensemble.ANTARCTIC SCIENCE,31(1),37-51. |
MLA | Wainer, Ilana,et al."Changes in the Atlantic Sector of the Southern Ocean estimated from the CESM Last Millennium Ensemble".ANTARCTIC SCIENCE 31.1(2019):37-51. |
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