DOI: 10.1175/JCLI-D-12-00133.1
Scopus记录号: 2-s2.0-84877922065
论文题名: Meridional energy transport in the coupled atmosphere-ocean system: Compensation and partitioning
作者: Farneti R. ; Vallis G.K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 18 起始页码: 7151
结束页码: 7166
语种: 英语
Scopus关键词: Atlantic meridional overturning circulations
; Atmosphere-ocean system
; Atmospheric Winds
; Decadal variability
; Energy balance models
; Intermediate complexity
; Long-term variability
; Top of atmospheres
; Atmospheric movements
; Heat transfer
; Oceanography
; atmosphere-ocean coupling
; atmospheric modeling
; climate modeling
; efficiency measurement
; energy flux
; meridional circulation
; oceanic circulation
; radiation budget
; top of atmosphere
; wind field
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: The variability and compensation of the meridional energy transport in the atmosphere and ocean are examined with the state-of-the-art GFDL Climate Model, version 2.1 (CM2.1), and the GFDL Intermediate Complexity Coupled Model (ICCM). On decadal time scales, a high degree of compensation between the energy transport in the atmosphere (AHT) and ocean (OHT) is found in the North Atlantic. The variability of the total or planetary heat transport (PHT) is much smaller than the variability in either AHT or OHT alone, a feature referred to as "Bjerknes compensation." Natural decadal variability stems from the Atlantic meridional overturning circulation (AMOC), which leadsOHTvariability. The PHT is positively correlated with the OHT, implying that the atmosphere is compensating, but imperfectly, for variations in ocean transport. Because of the fundamental role of the AMOC in generating the decadal OHT anomalies, Bjerknes compensation is expected to be active only in coupled models with a low-frequency AMOC spectral peak. The AHT and the transport in the oceanic gyres are positively correlated because the gyre transport responds to the atmospheric winds, thereby militating against long-term variability involving the wind-driven flow. Moisture and sensible heat transports in the atmosphere are also positively correlated at decadal time scales. The authors further explore the mechanisms and degree of compensation with a simple, diffusive, two-layer energy balance model. Taken together, these results suggest that compensation can be interpreted as arising from the highly efficient nature of the meridional energy transport in the atmosphere responding to ocean variability rather than any a priori need for the top-of-atmosphere radiation budget to be fixed. © 2013 American Meteorological Society. 资助项目: NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51662
Appears in Collections: 气候变化事实与影响
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作者单位: Earth System Physics Section, International Centre for Theoretical Physics, Trieste, Italy; Princeton University, Princeton, NJ, United States
Recommended Citation:
Farneti R.,Vallis G.K.. Meridional energy transport in the coupled atmosphere-ocean system: Compensation and partitioning[J]. Journal of Climate,2013-01-01,26(18)