DOI: 10.1175/JCLI-D-16-0151.1
Scopus记录号: 2-s2.0-84987958800
论文题名: Climate feedback variance and the interaction of aerosol forcing and feedbacks
作者: Gettelman A. ; Lin L. ; Medeiros B. ; Olson J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 18 起始页码: 6659
结束页码: 6675
语种: 英语
Scopus关键词: Aerosols
; Budget control
; Clouds
; Earth (planet)
; Feedback
; Greenhouse gases
; Aerosol-cloud interaction
; Climate sensitivity
; Climate simulation
; Cloud radiative effects
; Coupled models
; Ensemble simulation
; Initial condition ensembles
; Standard deviation
; Climate models
英文摘要: Aerosols can influence cloud radiative effects and, thus, may alter interpretation of how Earth's radiative budget responds to climate forcing. Three different ensemble experiments from the same climate model with different greenhouse gas and aerosol scenarios are used to analyze the role of aerosols in climate feedbacks and their spread across initial condition ensembles of transient climate simulations. The standard deviation of global feedback parameters across ensemble members is low, typically 0.02 W m-2 K-1. Feedbacks from high (8.5 W m-2) and moderate (4.5 W m-2) year 2100 forcing cases are nearly identical. An aerosol kernel is introduced to remove effects of aerosol cloud interactions that alias into cloud feedbacks. Adjusted cloud feedbacks indicate an "aerosol feedback" resulting from changes to climate that increase sea-salt emissions, mostly in the Southern Ocean. Ensemble simulations also indicate higher tropical cloud feedbacks with higher aerosol loading. These effects contribute to a difference in cloud feedbacks of nearly 50% between ensembles of the same model. These two effects are also seen in aquaplanet simulations with varying fixed drop number. Thus aerosols can be a significant modifier of cloud feedbacks, and different representations of aerosols and their interactions with clouds may contribute to multimodel spread in climate feedbacks and climate sensitivity in multimodel archives. © 2016 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50052
Appears in Collections: 气候变化事实与影响
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作者单位: National Center for Atmospheric Research, Boulder, CO, United States; College of Atmospheric Sciences, Lanzhou University, Lanzhou, China
Recommended Citation:
Gettelman A.,Lin L.,Medeiros B.,et al. Climate feedback variance and the interaction of aerosol forcing and feedbacks[J]. Journal of Climate,2016-01-01,29(18)