DOI: 10.1175/JCLI-D-11-00059.1
Scopus记录号: 2-s2.0-84856972987
论文题名: An equatorial ocean bottleneck in global climate models
作者: Karnauskas K.B. ; Johnson G.C. ; Murtugudde R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 1 起始页码: 343
结束页码: 349
语种: 英语
Scopus关键词: Competing mechanisms
; Coupled models
; Eastern pacific
; Equatorial undercurrents
; Global climate model
; Higher resolution
; Nonlinear terms
; Ocean circulation
; Ocean dynamics
; Ocean model
; Radiative forcings
; Tropical Pacific ocean
; Zonal momentum balance
; Atmospheric radiation
; Climate models
; Tropics
; Uncertainty analysis
; Oceanography
; atmosphere-ocean coupling
; climate modeling
; current velocity
; equatorial dynamics
; oceanic circulation
; oceanic general circulation model
; radiative forcing
; undercurrent
; upwelling
; Pacific Ocean
; Pacific Ocean (East)
; Pacific Ocean (Tropical)
英文摘要: The Equatorial Undercurrent (EUC) is a major component of the tropical Pacific Ocean circulation. EUC velocity in most global climate models is sluggish relative to observations. Insufficient ocean resolution slows the EUC in the eastern Pacific where nonlinear terms should dominate the zonal momentum balance. A slow EUC in the east creates a bottleneck for the EUC to the west. However, this bottleneck does not impair other major components of the tropical circulation, including upwelling and poleward transport. In most models, upwelling velocity and poleward transport divergence fall within directly estimated uncertainties. Both of these transports play a critical role in a theory for how the tropical Pacific may change under increased radiative forcing, that is, the ocean dynamical thermostat mechanism. These findings suggest that, in the mean, global climate models may not underrepresent the role of equatorial ocean circulation, nor perhaps bias the balance between competing mechanisms for how the tropical Pacific might change in the future. Implications for model improvement under higher resolution are also discussed. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52620
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Woods Hole Oceanographic Institution, Woods Hole, MA, United States; NOAA/Pacific Marine Environmental Laboratory, Seattle, WA, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States
Recommended Citation:
Karnauskas K.B.,Johnson G.C.,Murtugudde R.. An equatorial ocean bottleneck in global climate models[J]. Journal of Climate,2012-01-01,25(1)