DOI: 10.1002/2015GL064482
论文题名: A new Eulerian method to estimate "spicy" Agulhas leakage in climate models
作者: Putrasahan D.A. ; Beal L.M. ; Kirtman B.P. ; Cheng Y.
刊名: Geophysical Research Letters
ISSN: 0094-9336
EISSN: 1944-9067
出版年: 2015
卷: 42, 期: 11 起始页码: 4532
结束页码: 4539
语种: 英语
英文关键词: Agulhas leakage
; coupled climate models
; Lagrangian and Eulerian comparison
; spice
Scopus关键词: Lagrange multipliers
; Saline water
; SPICE
; Coupled climate model
; Eulerian
; Eulerian method
; Global thermohaline circulation
; Lagrangian transport
; Ocean eddies
; Passive tracers
; South Atlantic
; Climate models
英文摘要: The Agulhas leakage brings warm and saline water from the Indian Ocean into the South Atlantic, forming part of the returning branch of the global thermohaline circulation, an important component of climate. We develop a new method using the passive tracer spice, to estimate Agulhas leakage transport in an ocean eddy-resolving climate model that properly captures Agulhas Retroflection and leakage. We identify Agulhas leakage waters as positive spice anomalies (≥ +0.1) and are able to trace leakage to depths greater than 1000 m. Spice-based Eulerian Agulhas leakage captures spikes in Lagrangian leakage transport which coincide with the passage of Agulhas rings, yielding a statistically significant correlation (0.47). On interannual times scales, differences between Eulerian and Lagrangian transports are reduced and correlation increases to 0.77. We obtain a mean spice-based Eulerian Agulhas leakage of 17 ± 4 sverdrup (Sv) and Lagrangian Agulhas leakage of 18 ± 2 Sv, which are within the range of observational estimates. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84934440638&doi=10.1002%2f2015GL064482&partnerID=40&md5=46bbbfea1cd1fbfa07acb2d4b649ec03
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8951
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: Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States
Recommended Citation:
Putrasahan D.A.,Beal L.M.,Kirtman B.P.,et al. A new Eulerian method to estimate "spicy" Agulhas leakage in climate models[J]. Geophysical Research Letters,2015-01-01,42(11).