DOI: 10.1175/JCLI-D-14-00832.1
Scopus记录号: 2-s2.0-84933283630
论文题名: Constraints on cumulus parameterization from simulations of observed MJO events
作者: Del Genio A.D. ; Wu J. ; Wolf A.B. ; Chen Y. ; Yao M.-S. ; Kim D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 16 起始页码: 6419
结束页码: 6442
语种: 英语
Scopus关键词: Atmospheric radiation
; Clouds
; Heat convection
; Rain
; Cold pool
; Convective clouds
; Convective parameterization
; Indian ocean
; Madden-Julian oscillation
; Climatology
; atmospheric convection
; convective cloud
; cumulus
; general circulation model
; Madden-Julian oscillation
; parameterization
; Indian Ocean
英文摘要: Two recent activities offer an opportunity to test general circulation model (GCM) convection and its interaction with large-scale dynamics for observed Madden-Julian oscillation (MJO) events. This study evaluates the sensitivity of the Goddard Institute for Space Studies (GISS) GCM to entrainment, rain evaporation, downdrafts, and cold pools. Single Column Model versions that restrict weakly entraining convection produce the most realistic dependence of convection depth on column water vapor (CWV) during the Atmospheric Radiation Measurement MJO Investigation Experiment at Gan Island. Differences among models are primarily at intermediate CWV where the transition from shallow to deeper convection occurs. GCM 20-day hindcasts during the Year of Tropical Convection that best capture the shallow-deep transition also produce strong MJOs, with significant predictability compared to Tropical Rainfall Measuring Mission data. The dry anomaly east of the disturbance on hindcast day 1 is a good predictor of MJO onset and evolution. Initial CWV there is near the shallow-deep transition point, implicating premature onset of deep convection as a predictor of a poor MJO simulation. Convection weakly moistens the dry region in good MJO simulations in the first week; weakening of large-scale subsidence over this time may also affect MJO onset. Longwave radiation anomalies are weakest in the worst model version, consistent with previous analyses of cloud/moisture greenhouse enhancement as the primaryMJOenergy source. The authors' results suggest that both cloud-/moisture-radiative interactions and convection-moisture sensitivity are required to produce a successful MJO simulation. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50655
Appears in Collections: 气候变化事实与影响
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作者单位: NASA Goddard Institute for Space Studies, New York, NY, United States; Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Trinnovim LLC, Institute for Space Studies, New York, NY, United States; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States
Recommended Citation:
Del Genio A.D.,Wu J.,Wolf A.B.,et al. Constraints on cumulus parameterization from simulations of observed MJO events[J]. Journal of Climate,2015-01-01,28(16)