DOI: 10.1175/JCLI-D-14-00279.1
Scopus记录号: 2-s2.0-84930215685
论文题名: Resolution dependence of European precipitation in a state-of-the-art atmospheric general circulation model
作者: Haren R. ; Haarsma R.J. ; Oldenborgh G.J. ; Hazeleger W.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 13 起始页码: 5134
结束页码: 5149
语种: 英语
Scopus关键词: Earth (planet)
; Earth atmosphere
; Image resolution
; Moisture
; Storms
; Velocity
; Velocity distribution
; Atmospheric general circulation models
; European precipitations
; High-resolution models
; Horizontal resolution
; Moisture convergence
; Statistical differences
; Vertical velocity distribution
; Winter precipitation
; Climate models
; accuracy assessment
; atmospheric general circulation model
; atmospheric moisture
; climate modeling
; climate prediction
; precipitation (climatology)
; spatial resolution
; storm track
; weather forecasting
; winter
; Europe
英文摘要: In this study, the authors investigate the effect of GCM spatial resolution on modeled precipitation over Europe. The objectives of the analysis are to determine whether climate models have sufficient spatial resolution to have an accurate representation of the storm tracks that affect precipitation. They investigate if there is a significant statistical difference in modeled precipitation between a medium-resolution (~ 112-km horizontal resolution) and a high-resolution (~ 25-km horizontal resolution) version of a state-of-the-art AGCM (EC-EARTH), if either model resolution gives a better representation of precipitation in the current climate, and what processes are responsible for the differences inmodeled precipitation. The authors find that the highresolution model gives a more accurate representation of northern and central European winter precipitation. The medium-resolution model has a larger positive bias in precipitation inmost of the northern half of Europe. Storm tracks are better simulated in the high-resolution model, providing for a more accurate horizontal moisture transport and moisture convergence. Using a decomposition of the precipitation difference between the medium- and high-resolution model in a part related and a part unrelated to a difference in the distribution of vertical atmospheric velocity, the authors find that the smaller precipitation bias in central and northern Europe is largely unrelated to a difference in vertical velocity distribution. The smaller precipitation amount in these areas is in agreementwith lessmoisture transport over this area in the high-resolution model. In areas with orography the change in vertical velocity distribution is found to be more important. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50688
Appears in Collections: 气候变化事实与影响
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作者单位: Royal Netherlands Meteorological Institute, De Bilt, Netherlands; Netherlands eScience Center, Amsterdam, Netherlands; Meteorology and Air Quality Section, Wageningen University, Wageningen, Netherlands
Recommended Citation:
Haren R.,Haarsma R.J.,Oldenborgh G.J.,et al. Resolution dependence of European precipitation in a state-of-the-art atmospheric general circulation model[J]. Journal of Climate,2015-01-01,28(13)