DOI: 10.1175/JCLI-D-18-0042.1
Scopus记录号: 2-s2.0-85052839385
论文题名: Sensitivity of surface temperature to oceanic forcing via q-Flux green's function experiments. Part II: Feedback decomposition and polar amplification
作者: Liu F. ; Lu J. ; Garuba O.A. ; Huang Y. ; Ruby Leung L. ; Harrop B.E. ; Luo Y.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 17 起始页码: 6745
结束页码: 6761
语种: 英语
英文关键词: Atmosphere-ocean interaction
; Climate sensitivity
; Climate variabilit
; Feedback
; Forcing
Scopus关键词: Atmospheric thermodynamics
; Feedback
; Atmosphere-ocean interactions
; Climate sensitivity
; Climate variabilit
; Forcing
; Global surface air temperature
; Polar amplifications
; Spatial heterogeneity
; Surface temperatures
; Tropics
英文摘要: A large set of Green's function-type experiments is performed with q-flux forcings mimicking the effects of the ocean heat uptake (OHU) to examine the global surface air temperature (SAT) sensitivities to the location of the forcing. The result of the experiments confirms the earlier notion derived from experiments with different model complexities that the global mean SAT is far more sensitive to the oceanic forcing from high latitudes than the tropics. Remarkably, no matter in which latitude the q-flux forcings are placed, the SAT response is always characterized by a feature of polar amplification, implicating that it is intrinsic to our climate system. Considerable zonal asymmetry is also present in the efficacy of the tropical OHU, with the tropical eastern Pacific being much more efficient than the Indian Ocean and tropical Atlantic in driving global SAT warming by exciting the leading neutral mode of the SAT that projects strongly onto global mean warming. Using a radiative kernel, feedback analysis is also conducted to unravel the underlying processes responsible for the spatial heterogeneity in the global OHU efficacy, the polar amplification structures, and the tropical altruism of sharing the warmth with remote latitudes. Warming "altruism" for a q flux at a given latitude is also investigated in terms of the ratio of the induced remote latitudes versus the directly forced local warming. It is found that the tropics are much more altruistic than higher latitudes because of the high-energy transport efficiency of the Hadley circulation. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111397
Appears in Collections: 气候减缓与适应
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作者单位: Physical Oceanography Laboratory, Collaborative Innovation Center of Marine Science and Technology, Ocean University of China, China; Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States; Department of Atmospheric and Oceanic Sciences, McGill University, Montreal, QC, Canada
Recommended Citation:
Liu F.,Lu J.,Garuba O.A.,et al. Sensitivity of surface temperature to oceanic forcing via q-Flux green's function experiments. Part II: Feedback decomposition and polar amplification[J]. Journal of Climate,2018-01-01,31(17)