DOI: 10.1175/JCLI-D-13-00551.1
Scopus记录号: 2-s2.0-84902105448
论文题名: Polar amplification in CCSM4: Contributions from the lapse rate and surface albedo feedbacks
作者: Graversen R.G. ; Langen P.L. ; Mauritsen T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 12 起始页码: 4433
结束页码: 4450
语种: 英语
Scopus关键词: Atmospheric radiation
; Climate models
; Solar radiation
; Troposphere
; Community climate system model
; Feedback mechanisms
; Infrared irradiance
; Latent heating/cooling
; Polar amplifications
; Stable stratification
; Temperature response
; Tropospheric warming
; Feedback
; albedo
; climate forcing
; climate modeling
; inverse analysis
; irradiance
; latent heat flux
; polar meteorology
; radiative forcing
; Antarctica
; Arctic
英文摘要: A vertically nonuniform warming of the troposphere yields a lapse rate feedback by altering the infrared irradiance to space relative to that of a vertically uniform tropospheric warming. The lapse rate feedback is negative at low latitudes, as a result of moist convective processes, and positive at high latitudes, due to stable stratification conditions that effectively trap warming near the surface. It is shown that this feedback pattern leads to polar amplification of the temperature response induced by a radiative forcing. The results are obtained by suppressing the lapse rate feedback in the Community Climate System Model, version 4 (CCSM4). The lapse rate feedback accounts for 15% of the Arctic amplification and 20% of the amplification in the Antarctic region. The fraction of the amplification that can be attributed to the surface albedo feedback, associated with melting of snow and ice, is 40% in the Arctic and 65% in Antarctica. It is further found that the surface albedo and lapse rate feedbacks interact considerably at high latitudes to the extent that they cannot be considered independent feedback mechanisms at the global scale. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51144
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Meteorology, Stockholm University, Stockholm, Sweden; Danish Meteorological Institute, Copenhagen, Denmark; Max Planck Institute, Hamburg, Germany
Recommended Citation:
Graversen R.G.,Langen P.L.,Mauritsen T.. Polar amplification in CCSM4: Contributions from the lapse rate and surface albedo feedbacks[J]. Journal of Climate,2014-01-01,27(12)