DOI: 10.1175/JCLI-D-12-00419.1
Scopus记录号: 2-s2.0-84881635656
论文题名: The contribution of radiative feedbacks to orbitally driven climate change
作者: Erb M.P. ; Broccoli A.J. ; Clement A.C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 16 起始页码: 5897
结束页码: 5914
语种: 英语
Scopus关键词: Anthropogenic forcing
; Atmospheric stability
; Global-mean temperature
; Hadley circulation
; Moist static energy
; Orbital configuration
; Orbital parameters
; Pre-industrial levels
; Atmospheric composition
; Atmospheric movements
; Climate change
; Experiments
; Glacial geology
; Incident solar radiation
; Feedback
; climate change
; climate feedback
; climate modeling
; orbital forcing
; radiative forcing
英文摘要: Radiative feedbacks influence Earth's climate response to orbital forcing, amplifying some aspects of the response while damping others. To better understand this relationship, the GFDL Climate Model, version 2.1 (CM2.1), is used to perform idealized simulations in which only orbital parameters are altered while ice sheets, atmospheric composition, and other climate forcings are prescribed at preindustrial levels. These idealized simulations isolate the climate response and radiative feedbacks to changes in obliquity and longitude of the perihelion alone. Analysis shows that, despite being forced only by a redistribution of insolation with no global annual-mean component, feedbacks induce significant global-mean climate change, resulting in mean temperature changes of 20.5K in a lowered obliquity experiment and 10.6K in a NH winter solstice perihelion minus NH summer solstice perihelion experiment. In the obliquity experiment, some global-mean temperature response may be attributable to vertical variations in the transport of moist static energy anomalies, which can affect radiative feedbacks in remote regions by altering atmospheric stability. In the precession experiment, cloud feedbacks alter the Arctic radiation balance with possible implications for glaciation. At times when the orbital configuration favors glaciation, reductions in cloud water content and low-cloud fraction partially counteract changes in summer insolation, posing an additional challenge to understanding glacial inception.Additionally, several systems, such as the Hadley circulation and monsoons, influence climate feedbacks in ways that would not be anticipated from analysis of feedbacks in the more familiar case of anthropogenic forcing, emphasizing the complexity of feedback responses. © 2013 American Meteorological Society. 资助项目: NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51722
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States; Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States
Recommended Citation:
Erb M.P.,Broccoli A.J.,Clement A.C.. The contribution of radiative feedbacks to orbitally driven climate change[J]. Journal of Climate,2013-01-01,26(16)