DOI: 10.1175/JCLI-D-11-00096.1
Scopus记录号: 2-s2.0-84856952465
论文题名: Climate feedbacks and their implications for poleward energy flux changes in a warming climate
作者: Zelinka M.D. ; Hartmann D.L.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 2 起始页码: 608
结束页码: 624
语种: 英语
Scopus关键词: Climate sensitivity
; Energy transport
; Forcing
; General circulation model
; Heat budget
; Radiation budgets
; Radiative forcings
; Atmospheric radiation
; Energy dissipation
; Feedback
; Fluxes
; Heat flux
; Poles
; Climate change
; albedo
; atmospheric general circulation model
; climate change
; climate feedback
; energy flux
; heat budget
; heat flux
; latitudinal gradient
; net radiation
; radiation budget
; radiative forcing
; top of atmosphere
; water vapor
英文摘要: Feedbacks determine the efficiency with which the climate system comes back into equilibrium in response to a radiative perturbation. Although feedbacks are integrated quantities, the processes from which they arise have rich spatial structures that alter the distribution of top of atmosphere (TOA) net radiation. Here, the authors investigate the implications of the structure of climate feedbacks for the change in poleward energy transport as the planet warms over the twenty-first century in a suite of GCMs. Using radiative kernels that describe the TOA radiative response to small perturbations in temperature, water vapor, and surface albedo, the change in poleward energy flux is partitioned into the individual feedbacks that cause it. This study finds that latitudinal gradients in the sum of climate feedbacks reinforce the preexisting latitudinal gradient in TOA net radiation, requiring that the climate system transport more energy to the poles on a warming planet. This is primarily due to structure of the water vapor and cloud feedbacks, which are strongly positive at low latitudes and decrease dramatically with increasing latitude. Using the change in surface fluxes, the authors partition the anomalous poleward energy flux between the atmosphere and ocean and find that reduced heat flux from the high-latitude ocean further amplifies the equator-to-pole gradient in atmospheric energy loss. This implied reduction in oceanic poleward energy flux requires the atmosphere to increase its share of the total poleward energy transport. As is the case for climate sensitivity, the largest source of intermodel spread in the change in poleward energy transport can be attributed to the shortwave cloud feedback. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52588
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Program for Climate Model Diagnosis and Intercomparison, Lawrence Livermore National Laboratory, Livermore, CA, United States
Recommended Citation:
Zelinka M.D.,Hartmann D.L.. Climate feedbacks and their implications for poleward energy flux changes in a warming climate[J]. Journal of Climate,2012-01-01,25(2)