DOI: 10.1175/JCLI-D-12-00696.1
Scopus记录号: 2-s2.0-84884252126
论文题名: A decomposition of feedback contributions to polar warming amplification
作者: Taylor P.C. ; Cai M. ; Hu A. ; Meehl J. ; Washington W. ; Zhang G.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 18 起始页码: 7023
结束页码: 7043
语种: 英语
Scopus关键词: Amplification factors
; Atmospheric dynamics
; Community climate system model
; Ocean heat transport
; Surface temperatures
; Surface turbulent fluxes
; Vertical temperature
; Water vapor feedbacks
; Atmospheric movements
; Atmospheric temperature
; Carbon dioxide
; Climate models
; Computer simulation
; Feedback
; Heat transfer
; Oceanography
; Surface properties
; Amplification
; albedo
; amplification
; atmospheric dynamics
; carbon dioxide
; climate feedback
; climate modeling
; global climate
; heat transfer
; longwave radiation
; Northern Hemisphere
; Southern Hemisphere
; surface temperature
; turbulent flow
; water vapor
; Atlantic Ocean
; Atlantic Ocean (North)
; Southern Ocean
英文摘要: Polar surface temperatures are expected to warm 2-3 times faster than the global-mean surface temperature: a phenomenon referred to as polar warming amplification. Therefore, understanding the individual process contributions to the polar warming is critical to understanding global climate sensitivity. The Coupled Feedback Response Analysis Method (CFRAM) is applied to decompose the annual-and zonal-mean vertical temperature response within a transient 1% yr21 CO2 increase simulation of the NCAR Community Climate System Model, version 4 (CCSM4), into individual radiative and nonradiative climate feedback process contributions. The total transient annual-mean polar warming amplification (amplification factor) at the time of CO2 doubling is 12.12 (2.3) and 10.94K (1.6) in the Northern and Southern Hemisphere, respectively. Surface albedo feedback is the largest contributor to the annual-mean polar warming amplification accounting for 11.82 and 11.04K in the Northern and Southern Hemisphere, respectively. Net cloud feedback is found to be the second largest contributor to polar warming amplification (about 10.38K in both hemispheres) and is driven by the enhanced downward longwave radiation to the surface resulting from increases in low polar water cloud. The external forcing and atmospheric dynamic transport also contribute positively to polar warming amplification:10.29 and10.32 K, respectively. Water vapor feedback contributes negatively to polar warming amplification because its induced surface warming is stronger in low latitudes. Ocean heat transport storage and surface turbulent flux feedbacks also contribute negatively to polar warming amplification. Ocean heat transport and storage terms play an important role in reducing the warming over the Southern Ocean and Northern Atlantic Ocean. © 2013 American Meteorological Society. 资助项目: NOAA, National Oceanic and Atmospheric Administration
; DOE, U.S. Department of Energy
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51660
Appears in Collections: 气候变化事实与影响
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作者单位: NASA Langley Research Center, Hampton, VA, United States; Department of Earth, Ocean and Atmospheric Science, The Florida State University, 1017 Academic Way, Tallahassee, FL 32306, United States; Climate Change Research, Climate and Global Dynamics, National Center for Atmospheric Research, Boulder, CO, United States; Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA, United States
Recommended Citation:
Taylor P.C.,Cai M.,Hu A.,et al. A decomposition of feedback contributions to polar warming amplification[J]. Journal of Climate,2013-01-01,26(18)