DOI: 10.1175/JCLI-D-11-00447.1
Scopus记录号: 2-s2.0-84864606249
论文题名: The tropical subseasonal variability simulated in the nasa giss general circulation model
作者: Kim D. ; Sobel A.H. ; Genio A.D.D ; Chen Y. ; Camargo S.J. ; Yao M.-S. ; Kelley M. ; Nazarenko L.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 13 起始页码: 4641
结束页码: 4659
语种: 英语
Scopus关键词: Dry and wet
; Entrainment rates
; General circulation model
; Intraseasonal variability
; Madden-Julian oscillation
; Model evaluation
; Subseasonal variability
; Temporal scale
; Tropical convection
; Tropical variabilty
; Vection
; NASA
; Parameterization
; Rain
; Storms
; Tropical engineering
; Tropics
; Computer simulation
; climate change
; convection
; general circulation model
; Madden-Julian oscillation
; parameterization
; seasonal variation
; tropical region
英文摘要: The tropical subseasonal variability simulated by the Goddard Institute for Space Studies general circu- lation model, Model E2, is examined. Several versions of Model E2 were developed with changes to the convective parameterization in order to improve the simulation of the Madden-Julian oscillation (MJO). When the convective scheme is modified to have a greater fractional entrainment rate, Model E2 is able to simulate MJO-like disturbances with proper spatial and temporal scales. Increasing the rate of rain reevap- oration has additional positive impacts on the simulated MJO. The improvement in MJO simulation comes at the cost of increased biases in the mean state, consistent in structure and amplitude with those found in other GCMs when tuned to have a stronger MJO. By reinitializing a relatively poor-MJO version with restart files from a relatively better-MJO version, a series of 30-day integrations is constructed to examine the impacts of the parameterization changes on the organization of tropical convection. The poor-MJO version with smaller entrainment rate has a tendency to allow convection to be activated over a broader area and to reduce the contrast between dry and wet regimes so that tropical convection becomes less organized. Besides the MJO, the number of tropical-cyclone-like vortices simulated by the model is also affected by changes in the con- vection scheme. The model simulates a smaller number of such storms globally with a larger entrainment rate, while the number increases significantly with a greater rain reevaporation rate. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52310
Appears in Collections: 气候变化事实与影响
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作者单位: Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Department of Earth and Environmental Sciences, Columbia University, New York, NY, United States; NASA Goddard Institute for Space Studies, New York, NY, United States; Trinnovim, Goddard Institute for Space Studies, New York, NY, United States; Center for Climate Systems Research, Columbia University, New York, NY, United States
Recommended Citation:
Kim D.,Sobel A.H.,Genio A.D.D,et al. The tropical subseasonal variability simulated in the nasa giss general circulation model[J]. Journal of Climate,2012-01-01,25(13)