DOI: 10.1175/JCLI-D-16-0190.1
Scopus记录号: 2-s2.0-84996937963
论文题名: 5-day-wave interactions with tropical precipitation in CMIP5 models
作者: King M.J. ; Wheeler M.C. ; Lane T.P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 23 起始页码: 8611
结束页码: 8624
语种: 英语
Scopus关键词: Geographical distribution
; Heat convection
; Mechanical waves
; Precipitation (meteorology)
; Rain
; Rain gages
; Tropics
; Coupled Model Intercomparison Project
; Model evaluation/performance
; Planetary Waves
; Precipitation anomalies
; Precipitation variation
; Rossby wave
; Trmm precipitation datum
; Tropical precipitation
; Climate models
英文摘要: The 5-day Rossby-Haurwitz wave is unlike other large-scale wave modes that interact with tropical rainfall in that associated rainfall presents as a modulation of localized areas of rainfall instead of propagating with the wave. This form of wave-modulated convective organization in climate models has received little attention. This study investigates the simulation of interactions between the 5-day wave and tropical convection in 30 models from phase 5 of the Coupled Model Intercomparison Project (CMIP5) and compares these with the interaction diagnosed from ERA-Interim and TRMM precipitation data. Models simulate the dry dynamics of the 5-day wave well, with realistic coherences between upper- and lower-tropospheric winds, as well as magnitudes and geographic distribution of wave wind anomalies being close to observations. The models consistently display significant coherences between 5-day-wave zonal winds and precipitation but perform less well at simulating the spatial distribution and magnitude of precipitation anomalies. For example, a third of the models do not reproduce significant observed anomalies near the Andes, and the best-performing model simulates only 38% of the observed variance over the tropical Andes and 24% of the observed variance over the Gulf of Guinea. Models with higher resolution perform better in simulating the magnitude of the Andean rainfall anomalies, but there is no similar relationship over the Gulf of Guinea. The evidence therefore suggests that the simulated interaction is mostly one way only, with the wave dynamics forcing the precipitation variations on the 5-day time scale. © 2016 American Meteorological Society. 资助项目: ARC, Australian Research Council
; 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/50029
Appears in Collections: 气候变化事实与影响
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作者单位: School of Earth Sciences, University of Melbourne, Melbourne, VIC, Australia; ARC Centre of Excellence for Climate System Science, University of Melbourne, Melbourne, VIC, Australia; Bureau of Meteorology, Melbourne, VIC, Australia
Recommended Citation:
King M.J.,Wheeler M.C.,Lane T.P.. 5-day-wave interactions with tropical precipitation in CMIP5 models[J]. Journal of Climate,2016-01-01,29(23)