DOI: 10.1175/JCLI-D-13-00216.1
Scopus记录号: 2-s2.0-84902096338
论文题名: The effect of greenhouse gas-induced changes in SST on the annual cycle of zonal mean tropical precipitation
作者: Dwyer J.G. ; Biasutti M. ; Sobel A.H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 12 起始页码: 4544
结束页码: 4565
语种: 英语
Scopus关键词: Budget control
; Climate change
; Climate models
; Experiments
; Greenhouse gases
; Tropics
; Coupled Model Intercomparison Project
; Coupled models
; Coupled simulation
; Degree of similarity
; Sea surface temperature (SST)
; Seasonal characteristics
; Seasonal precipitations
; Tropical precipitation
; Computer simulation
; air-sea interaction
; atmospheric modeling
; climate change
; greenhouse gas
; monsoon
; precipitation (climatology)
; sea surface temperature
; seasonal variation
; seasonality
; water vapor
; zonal flow
英文摘要: Models from phase 5 of the Coupled Model Intercomparison Project (CMIP5) project changes to the seasonality of both tropical sea surface temperature (SST) and precipitation when forced by an increase in greenhouse gases. Nearly all models project an amplification and a phase delay of the annual cycle for both quantities, indicating a greater annual range and extrema reached later in the year. The authors investigate the nature of the seasonal precipitation changes in AGCM experiments forced by SST perturbations, which represent idealizations of the changes in annual mean, amplitude, and phase as simulated by CMIP5 models. A uniform SST warming is sufficient to force both amplification and a delay of the annual cycle of precipitation. The amplification is due to an increase in the annual mean vertical water vapor gradient, while the delay is affected by changes in the seasonality of the circulation. A budget analysis of this simulation reveals a large degree of similarity with the CMIP5 results. In the second experiment, only the seasonal characteristics of SST are changed. In response to an amplified annual cycle of SST, the annual cycle of precipitation is amplified, while for a delayed SST, the annual cycle of precipitation is delayed. Assuming that SST changes can entirely explain the seasonal precipitation changes, theAGCMsimulations herein suggest that the annual mean warming explains most of the amplitude increase and much of the phase delay in the CMIP5 models. However, imperfect agreement between the changes in the SST-forced AGCM simulations and the CMIP5 coupled simulations suggests that coupled effects may play a significant role. © 2014 American Meteorological Society. 资助项目: NSF, National Aeronautics and Space Administration
; NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51086
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; Department of Applied Physics and Applied Mathematics, Department of Earth and Environmental Sciences, Lamont-Doherty Earth Observatory, Columbia University, New York, NY, United States
Recommended Citation:
Dwyer J.G.,Biasutti M.,Sobel A.H.. The effect of greenhouse gas-induced changes in SST on the annual cycle of zonal mean tropical precipitation[J]. Journal of Climate,2014-01-01,27(12)