DOI: 10.1175/JCLI-D-15-0480.1
Scopus记录号: 2-s2.0-84966349568
论文题名: Reproducibility of summer precipitation over northern Eurasia in CMIP5 multiclimate models
作者: Hirota N. ; Takayabu Y.N. ; Hamada A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 9 起始页码: 3317
结束页码: 3337
语种: 英语
Scopus关键词: Evaporation
; Moisture
; Precipitation (chemical)
; Precipitation (meteorology)
; Coupled Model Intercomparison Project
; Geographic location
; Low pressure systems
; Model comparison
; Model errors
; Northern Hemispheres
; Precipitation events
; Summer precipitation
; Climate models
; climate modeling
; climate prediction
; cloud cover
; moisture flux
; Northern Hemisphere
; precipitation (climatology)
; troposphere
; weather forecasting
; Eurasia
英文摘要: Reproducibility of summer precipitation over northern Eurasia in climate models from phase 5 of the Coupled Model Intercomparison Project (CMIP5) is evaluated in comparison with several observational and reanalysis datasets. All CMIP5 models under- and overestimate precipitation over western and eastern Eurasia, respectively, and the reproducibility measured using the Taylor skill score is largely determined by the severity of these west-east precipitation biases. The following are the two possible causes for the precipitation biases: Very little cloud cover and very strong local evaporation-precipitation coupling. The models underestimate cloud cover over Eurasia, allowing too much sunshine and leading to a warm bias at the surface. The associated cyclonic circulation biases in the lower troposphere weaken the modeled moisture transport from the Atlantic to western Eurasia and enhance the northward moisture flux along the eastern coast. Once the dry west and wet east biases appear in the models, they become amplified because of stronger evaporation-precipitation coupling. The CMIP5 models reproduce precipitation events well over a time scale of several days, including the associated low pressure systems and local convection. However, the modeled precipitation events are relatively weaker over western Eurasia and stronger over eastern Eurasia compared to the observations, and these are consistent with the biases found in the seasonal average fields. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49954
Appears in Collections: 气候变化事实与影响
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作者单位: National Institute of Polar Research, The University of Tokyo, Tokyo, Japan; Atmosphere and Ocean Research Institute, The University of Tokyo, Tokyo, Japan
Recommended Citation:
Hirota N.,Takayabu Y.N.,Hamada A.. Reproducibility of summer precipitation over northern Eurasia in CMIP5 multiclimate models[J]. Journal of Climate,2016-01-01,29(9)