| DOI: | 10.1175/JCLI-D-15-0568.1
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| Scopus记录号: | 2-s2.0-84991238706
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| 论文题名: | Quantifying Agulhas leakage in a high-resolution climate model |
| 作者: | Cheng Y.; Putrasahan D.; Beal L.; Kirtman B.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2016
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| 卷: | 29, 期:19 | | 起始页码: | 6881
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| 结束页码: | 6892
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| 语种: | 英语
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| Scopus关键词: | Lagrange multipliers
; Velocity
; Community climate system model
; Coupled climate systems
; Coupled models
; High resolution climate model
; Lagrangian circulation/transport
; Lagrangian particle tracking
; Mass fluxes/transport
; Meridional overturning circulations
; Climate models
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| 英文摘要: | The leakage of warm and salty water from the Indian Ocean via the Agulhas system into the South Atlantic may play a critical role in climate variability by modulating the buoyancy fluxes associated with the meridional overturning circulation (MOC). New climate models, such as the Community Climate System Model, version 3.5 (CCSM3.5), are now able to resolve the Agulhas retroflection and constrain the inertially choked Agulhas leakage to more realistic values. These ocean-eddy-resolving climate models are poised to bolster understanding of the sensitivity and influence of Agulhas leakage in the coupled climate system. Here, a strategy is devised to quantify Agulhas leakage in CCSM3.5 by applying an offline Lagrangian particle-tracking approach, finding a mean interbasin transport of 11.2 Sv (1 Sv = 106 m3 s-1). It is shown that monthly mean outputs can be used to produce a reliable time series of Agulhas leakage variability on longer-than-seasonal time scales (correlation coefficient r = 0.88; p < 0.01) by comparing to a parallel simulation that archives daily mean fields every 5 days. The results show that Agulhas leakage variability at longer-than-seasonal time scales is less sensitive to the temporal resolution of the velocity fields than is the mean leakage transport. © 2016 American Meteorological Society. |
| 资助项目: | NSF, Norsk Sykepleierforbund
; NSF, Norsk Sykepleierforbund
; NSF, Norsk Sykepleierforbund
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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/50272
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Miami, FL, United States
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| Recommended Citation: | |
Cheng Y.,Putrasahan D.,Beal L.,et al. Quantifying Agulhas leakage in a high-resolution climate model[J]. Journal of Climate,2016-01-01,29(19)
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