DOI: 10.1175/JCLI-D-11-00564.1
Scopus记录号: 2-s2.0-84865091777
论文题名: Using a multiphysics ensemble for exploring diversity in cloud-shortwave feedback in GCMs
作者: Watanabe M. ; Shiogama H. ; Yokohata T. ; Kamae Y. ; Yoshimori M. ; Ogura T. ; Annan J.D. ; Hargreaves J.C. ; Emori S. ; Kimoto M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 15 起始页码: 5416
结束页码: 5431
语种: 英语
Scopus关键词: Climate change simulations
; Climate sensitivity
; Cloud amount
; CO2 concentration
; Cumulus convection
; Hybrid model
; Intercomparisons
; Interdisciplinary research
; Model configuration
; Multi-model ensemble
; Multi-physics
; Parameterization schemes
; Project phase
; Turbulence scheme
; Carbon dioxide
; Climate change
; Clouds
; Feedback
; Climate models
; atmospheric convection
; carbon dioxide
; climate change
; climate feedback
; climate modeling
; cloud radiative forcing
; cumulus
; ensemble forecasting
; global climate
; parameterization
; turbulence
英文摘要: This study proposes a systematic approach to investigate cloud-radiative feedbacks to climate change induced by an increase of CO2 concentrations in global climatemodels (GCMs). Based on two versions of theModel for Interdisciplinary Research on Climate (MIROC), which have opposite signs for cloud-shortwave feedback (DSWcld) and hence different equilibrium climate sensitivities (ECSs), hybrid models are constructed by replacing one or more parameterization schemes for cumulus convection, cloud, and turbulence between them. An ensemble of climate change simulations using a suite of eightmodels, called amultiphysics ensemble(MPE), is generated. TheMPE provides a range of ECS as wide as the CoupledModel Intercomparison Project phase 3 (CMIP3) multimodel ensemble and reveals a different magnitude and sign of DSWcld over the tropics, which is crucial for determining ECS. It is found that no single process controls DSWcld, but that the coupling of two processes does. Namely, changing the cloud and turbulence schemes greatly alters the mean and the response of low clouds, whereas replacing the convection and cloud schemes affects low and middle clouds over the convective region. For each of the circulation regimes, DSWcld and cloud changes in theMPE have a nonlinear, but systematic, relationship with the mean cloud amount, which can be constrained from satellite estimates. The analysis suggests a positive feedback over the subsidence regime and a near-neutral or weak negative DSWcld over the convective regime in these model configurations, which, however, may not be carried into other models. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52281
Appears in Collections: 气候变化事实与影响
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作者单位: Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Chiba, Japan; National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan; Research Institute for Global Change, JAMSTEC, Yokosuka, Kanagawa, Japan
Recommended Citation:
Watanabe M.,Shiogama H.,Yokohata T.,et al. Using a multiphysics ensemble for exploring diversity in cloud-shortwave feedback in GCMs[J]. Journal of Climate,2012-01-01,25(15)