DOI: 10.1007/s00382-014-2102-z
Scopus记录号: 2-s2.0-84897576198
论文题名: Time-scale and state dependence of the carbon-cycle feedback to climate
作者: Willeit M. ; Ganopolski A. ; Dalmonech D. ; Foley A.M. ; Feulner G.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 42, 期: 2017-07-08 起始页码: 1699
结束页码: 1713
语种: 英语
英文关键词: Carbon cycle
; Carbon-climate interaction
; Feedbacks
; Initial state dependence
; Time-scale dependence
英文摘要: Climate and atmospheric CO2 concentration are intimately coupled in the Earth system: CO2 influences climate through the greenhouse effect, but climate also affects CO2 through its impact on the amount of carbon stored on land and in the ocean. The change in atmospheric CO2 as a response to a change in temperature (ΔCO2/ΔT) is a useful measure to quantify the feedback between the carbon cycle and climate. Using an ensemble of experiments with an Earth system model of intermediate complexity we show a pronounced time-scale dependence of ΔCO2/ΔT. A maximum is found on centennial scales with ΔCO2/ΔT values for the model ensemble in the range 5-12 ppm °C-1, while lower values are found on shorter and longer time scales. These results are consistent with estimates derived from past observations. Up to centennial scales, the land carbon response to climate dominates the CO2 signal in the atmosphere, while on longer time scales the ocean becomes important and eventually dominates on multi-millennial scales. In addition to the time-scale dependence, modeled ΔCO2/ΔT show a distinct dependence on the initial state of the system. In particular, on centennial time-scales, high ΔCO2/ΔT values are correlated with high initial land carbon content. A similar relation holds also for the CMIP5 models, although for ΔCO2/ΔT computed from a very different experimental setup. The emergence of common patterns like this could prove to usefully constrain the climate-carbon cycle feedback. © 2014 Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54670
Appears in Collections: 过去全球变化的重建
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作者单位: Potsdam Institute for Climate Impact Research, Potsdam, Germany; Max-Planck Institute for Biogeochemistry, Jena, Germany; Department of Land Economy, Cambridge Centre for Climate Change Mitigation Research (4CMR), University of Cambridge, Cambridge, United Kingdom
Recommended Citation:
Willeit M.,Ganopolski A.,Dalmonech D.,et al. Time-scale and state dependence of the carbon-cycle feedback to climate[J]. Climate Dynamics,2014-01-01,42(2017-07-08)