DOI: 10.1029/2012GL054581
论文题名: Atlantic meridional heat transports in two ocean reanalyses evaluated against the RAPID array
作者: Haines K. ; Stepanov V.N. ; Valdivieso M. ; Zuo H.
刊名: Geophysical Research Letters
ISSN: 0094-9368
EISSN: 1944-9099
出版年: 2013
卷: 40, 期: 2 起始页码: 343
结束页码: 348
语种: 英语
Scopus关键词: Atlantic meridional overturning circulations
; Depth structure
; Ekman transport
; Geostrophic flow
; Global ocean model
; Meridional heat transports
; Seasonal thermocline
; Temperature differences
; Ocean currents
; Shear flow
; Heat transfer
; Ekman transport
; geostrophic flow
; global ocean
; heat transfer
; meridional circulation
; overturn
; QuikSCAT
; throughfall
; Atlantic Ocean
; Gulf Stream
; Straits of Florida
英文摘要: The Atlantic meridional overturning circulation in two versions of the NEMO 1/4 ° global ocean model has been compared with the RAPID transport array at 26°N. Both model versions reproduce the mean MOC strength well although the Florida Straits flows differ because the pathway of the Gulf Stream is not strongly constrained at this resolution. Both models however have a mean meridional heat transport of 1.07PW, much lower than the 1.35PW from RAPID observations in April 2004-October 2007. Much of the heat transport discrepancy is due to lower transports in summer across the MidOcean (Bahamas-Africa) section, due to stronger southward geostrophic flows in the top 100m where the water is warmest. Seasonal thermocline changes increase temperature differences across the basin driving stronger geostrophic shear, but this effect is much weaker in the top 100m of the RAPID velocity data. The effect accounts for a reduction of 1.1Sv in MOC and 0.1PW in heat transports. The rest of the discrepancy comes from lower Ekman transports from using ERAInterim winds instead of QuikSCAT, a smaller zonally varying "Eddy" heat transport component, estimated from repeat XBT sections in the observations, and the southward throughflow in the model. Other differences in depth structure of the model MOC and RAPID observations are described but have much less impact on heat transports. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84874838751&doi=10.1029%2f2012GL054581&partnerID=40&md5=66def86eb4a454c760e62855177d97e0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6632
Appears in Collections: 气候减缓与适应
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作者单位: NCEO, University of Reading, Reading, United Kingdom
Recommended Citation:
Haines K.,Stepanov V.N.,Valdivieso M.,et al. Atlantic meridional heat transports in two ocean reanalyses evaluated against the RAPID array[J]. Geophysical Research Letters,2013-01-01,40(2).