| DOI: | 10.1002/2013GL059153
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| 论文题名: | Topographic vorticity waves forced by Antarctic dense shelf water outflows |
| 作者: | Marques G.M.; Padman L.; Springer S.R.; Howard S.L.; Özgökmen T.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10362
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| EISSN: | 1944-10093
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| 出版年: | 2014
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| 卷: | 41, 期:4 | | 起始页码: | 1247
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| 结束页码: | 1254
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| 语种: | 英语
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| 英文关键词: | Antarctic outflows
; cross-slope exchanges
; topographic vorticity waves
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| Scopus关键词: | Sea ice
; Wave energy conversion
; Antarctic outflows
; Continental slope
; Density anomalies
; Phase propagation
; Realistic simulation
; Sea ice concentration
; Vorticity waves
; Weak stratification
; Vorticity
; continental slope
; energy flux
; frequency analysis
; numerical model
; timescale
; topography
; vorticity
; Antarctica
; Ross Sea
; Southern Ocean
; Weddell Sea
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| 英文摘要: | We use numerical simulations to investigate excitation of topographic vorticity waves (TVWs) along the Antarctic continental slope by outflows of dense shelf water through troughs. Idealized models show that wave frequency depends on the amount of stretching in the ambient fluid over the outflow and on background along-slope mean flow. Frequency is higher for steeper bottom slope, larger outflow density anomaly, and stronger westward mean flow. For weak stratification and weak westward along-slope flows typical of the Antarctic slope, wave energy propagates eastward, in the opposite direction from phase velocity. Our results are consistent with recent observations of TVWs in the southern Weddell Sea. In a realistic simulation of the Ross Sea, TVW properties are modulated on seasonal and shorter time scales as background ocean state varies. We expect these waves to affect mixing, cross-slope exchanges, and sea ice concentration in the vicinity of sources of dense water outflows. Key Points Outflow of Antarctic dense shelf water through troughs generate TVWs Wave frequency depends on the amount of stretching induced in ambient fluid TVW energy flux is generally eastward, opposing phase propagation ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84894273341&doi=10.1002%2f2013GL059153&partnerID=40&md5=15cd27a979d73742e087388e768348f4
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7626
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Division of Meteorology and Physical Oceanography, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami FL, United States
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| Recommended Citation: | |
Marques G.M.,Padman L.,Springer S.R.,et al. Topographic vorticity waves forced by Antarctic dense shelf water outflows[J]. Geophysical Research Letters,2014-01-01,41(4).
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