DOI: 10.1175/JCLI-D-14-00042.1
Scopus记录号: 2-s2.0-84909592257
论文题名: Estimating the contribution of sea ice response to climate sensitivity in a climate model
作者: Caldeira K. ; Cvijanovic I.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 22 起始页码: 8597
结束页码: 8607
语种: 英语
Scopus关键词: Atmospheric radiation
; Climate change
; Earth (planet)
; Feedback
; Ice
; Ice control
; Sea ice
; Climate feedbacks
; Climate sensitivity
; Control simulation
; Earth system model
; General circulation model
; Radiative forcings
; Radiative properties
; Slab ocean models
; Climate models
; climate change
; climate effect
; climate modeling
; general circulation model
; longwave radiation
; radiative forcing
; sea ice
; sensitivity analysis
英文摘要: The response of sea ice to climate change affects Earth's radiative properties in ways that contribute to yet more climate change. Here, a configuration of the Community Earth System Model, version 1.0.4 (CESM1.0.4), with a slab ocean model and a thermodynamic-dynamic sea ice model is used to investigate the overall contribution to climate sensitivity of feedbacks associated with the sea ice loss. In simulations in which sea ice is not present and ocean temperatures are allowed to fall below freezing, the climate feedback parameter averages ~1.31Wm-2K-1; the value obtained for control simulations with active sea ice is ~1.05Wm-2K-1, indicating that, in this configuration of CESM1.0.4, sea ice response accounts for ~20% of climate sensitivity to an imposed change in radiative forcing. In this model, the effect of sea ice response on the longwave climate feedback parameter is nearly half as important as its effect on the shortwave climate feedback parameter. Further, it is shown that the strength of the overall sea ice feedback can be related to 1) the sensitivity of sea ice area to changes in temperature and 2) the sensitivity of sea ice radiative forcing to changes in sea ice area. An alternative method of disabling sea ice response leads to similar conclusions. It is estimated that the presence of sea ice in the preindustrial control simulation has a climate effect equivalent to ~3Wm-2 of radiative forcing. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51275
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Global Ecology, Carnegie Institution for Science, Stanford, CA, United States; Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
Recommended Citation:
Caldeira K.,Cvijanovic I.. Estimating the contribution of sea ice response to climate sensitivity in a climate model[J]. Journal of Climate,2014-01-01,27(22)