DOI: 10.1175/JCLI-D-15-0664.1
Scopus记录号: 2-s2.0-84974831593
论文题名: Metrics for the diurnal cycle of precipitation: Toward routine benchmarks for climate models
作者: Covey C. ; Gleckler P.J. ; Doutriaux C. ; Williams D.N. ; Dai A. ; Fasullo J. ; Trenberth K. ; Berg A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 12 起始页码: 4461
结束页码: 4471
语种: 英语
Scopus关键词: Data encapsulation
; Precipitation (chemical)
; Coupled Model Intercomparison Project
; Diurnal effects
; High resolution simulations
; Large amounts of data
; Model intercomparisons
; Multi-model ensemble
; Satellite observations
; Two-dimensional map
; Climate models
; atmospheric structure
; baroclinic wave
; climate modeling
; diurnal variation
; parameterization
; precipitation (climatology)
英文摘要: Metrics are proposed-that is, a few summary statistics that condense large amounts of data from observations or model simulations-encapsulating the diurnal cycle of precipitation. Vector area averaging of Fourier amplitude and phase produces useful information in a reasonably small number of harmonic dial plots, a procedure familiar from atmospheric tide research. The metrics cover most of the globe but down-weight high-latitude wintertime ocean areas where baroclinic waves are most prominent. This enables intercomparison of a large number of climate models with observations and with each other. The diurnal cycle of precipitation has features not encountered in typical climate model intercomparisons, notably the absence of meaningful "average model" results that can be displayed in a single two-dimensional map. Displaying one map per model guides development of the metrics proposed here by making it clear that land and ocean areas must be averaged separately, but interpreting maps from all models becomes problematic as the size of a multimodel ensemble increases. Global diurnal metrics provide quick comparisons with observations and among models, using the most recent version of the Coupled Model Intercomparison Project (CMIP). This includes, for the first time in CMIP, spatial resolutions comparable to global satellite observations. Consistent with earlier studies of resolution versus parameterization of the diurnal cycle, the longstanding tendency of models to produce rainfall too early in the day persists in the high-resolution simulations, as expected if the error is due to subgrid-scale physics. © 2016 American Meteorological Society. 资助项目: NSF, National Science Foundation
; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49926
Appears in Collections: 气候变化事实与影响
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作者单位: Program for Climate Model Diagnosis and Intercomparison, Lawrence Livermore National Laboratory, Livermore, CA, United States; University at Albany, State University of New York, Albany, NY, United States; National Center for Atmospheric Research, Boulder, CO, United States; International Research Institute for Climate and Society, Columbia University, New York, NY, United States
Recommended Citation:
Covey C.,Gleckler P.J.,Doutriaux C.,et al. Metrics for the diurnal cycle of precipitation: Toward routine benchmarks for climate models[J]. Journal of Climate,2016-01-01,29(12)