| DOI: | 10.1002/2016GL069480
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| 论文题名: | Observed eddy dissipation in the Agulhas Current |
| 作者: | Braby L.; Backeberg B.C.; Ansorge I.; Roberts M.J.; Krug M.; Reason C.J.C.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8793
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| EISSN: | 1944-8524
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| 出版年: | 2016
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| 卷: | 43, 期:15 | | 起始页码: | 8143
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| 结束页码: | 8150
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| 语种: | 英语
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| 英文关键词: | Agulhas Current
; source region eddies
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| Scopus关键词: | Atmospheric pressure
; Ocean currents
; Storms
; Agulhas current
; Composite analysis
; Eddy characteristics
; Eddy dissipation
; Geostrophic currents
; Mozambique channels
; Satellite altimeter
; Source region
; Velocity
; data set
; dissipation
; drifter
; eddy covariance
; satellite altimetry
; tracking
; velocity profile
; Agulhas Current
; Indian Ocean
; Madagascar
; Mozambique Channel
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| 英文摘要: | Analyzing eddy characteristics from a global data set of automatically tracked eddies for the Agulhas Current in combination with surface drifters as well as geostrophic currents from satellite altimeters, it is shown that eddies from the Mozambique Channel and south of Madagascar dissipate as they approach the Agulhas Current. By tracking the offshore position of the current core and its velocity at 30°S in relation to eddies, it is demonstrated that eddy dissipation occurs through a transfer of momentum, where anticyclones consistently induce positive velocity anomalies, and cyclones reduce the velocities and cause offshore meanders. Composite analyses of the anticyclonic (cyclonic) eddy-current interaction events demonstrate that the positive (negative) velocity anomalies propagate downstream in the Agulhas Current at 44 km/d (23 km/d). Many models are unable to represent these eddy dissipation processes, affecting our understanding of the Agulhas Current. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84981332523&doi=10.1002%2f2016GL069480&partnerID=40&md5=b0113e362ff7de86023f69b6605d8ca8
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| Citation statistics: |
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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/9756
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Department of Oceanography, University of Cape Town, Cape Town, South Africa
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| Recommended Citation: | |
Braby L.,Backeberg B.C.,Ansorge I.,et al. Observed eddy dissipation in the Agulhas Current[J]. Geophysical Research Letters,2016-01-01,43(15).
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