DOI: 10.1002/2014GL061121
论文题名: On the state dependency of fast feedback processes in (paleo) climate sensitivity
作者: Von Der Heydt A.S. ; Köhler P. ; Van De Wal R.S.W. ; Dijkstra H.A.
刊名: Geophysical Research Letters
ISSN: 0094-9773
EISSN: 1944-9504
出版年: 2014
卷: 41, 期: 18 起始页码: 6484
结束页码: 6492
语种: 英语
英文关键词: climate sensitivity
; feedback processes
; Pleistocene ice ages
Scopus关键词: Atmospheric radiation
; Feedback
; Glacial geology
; Uncertainty analysis
; Climate sensitivity
; Feedback process
; Ice age
; Instrumental data
; Last Glacial Maximum
; Radiative forcings
; State-equilibrium
; Temperature anomaly
; Climate models
; albedo
; climate modeling
; data set
; instrumentation
; Last Glacial Maximum
; paleoclimate
; Pleistocene
; radiative forcing
; reconstruction
; sensitivity analysis
; temperature effect
英文摘要: Paleo data have been frequently used to determine the equilibrium (Charney) climate sensitivity Sa, and - if slow feedback processes (e.g., land-ice albedo) are adequately taken into account - they indicate a similar range as estimates based on instrumental data and climate model results. Many studies assume the (fast) feedback processes to be independent of the background climate state, e.g., equally strong during warm and cold periods. Here we assess the dependency of the fast feedback processes on the background climate state using data of the last 800 kyr and a box model of the climate system for interpretation. Applying a new method to account for background state dependency, we find Sa=0.61±0.07 K (W m-2)-1(±1σ) using a reconstruction of Last Glacial Maximum (LGM) cooling of -4.0 K and significantly lower climate sensitivity during glacial climates. Due to uncertainties in reconstructing the LGM temperature anomaly, Sa is estimated in the range Sa = 0.54-0.95 K (W m-2)-1. Key PointsWe analyzed data of radiative forcing and temperature from the last 800,000 yearsThe equilibrium climate sensitivity depends on the background climate stateEquilibrium climate sensitivity is higher in warmer than in colder climates ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911191675&doi=10.1002%2f2014GL061121&partnerID=40&md5=a661d047088a5af1d11695a38fc7e1e0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7037
Appears in Collections: 气候减缓与适应
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作者单位: Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, Netherlands
Recommended Citation:
Von Der Heydt A.S.,Köhler P.,Van De Wal R.S.W.,et al. On the state dependency of fast feedback processes in (paleo) climate sensitivity[J]. Geophysical Research Letters,2014-01-01,41(18).