DOI: 10.1002/jgrd.50525
论文题名: Uncertainties in a regional climate model in the midlatitudes due to the nesting technique and the domain size
作者: Žagar N. ; Honzak L. ; Žabkar R. ; Skok G. ; Rakovec J. ; Ceglar A.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 12 起始页码: 6189
结束页码: 6199
语种: 英语
英文关键词: lateral boundaries
; nesting technique
; regional modeling
Scopus关键词: Experiments
; European centre for medium-range weather forecasts
; Horizontal resolution
; Lateral boundary
; nesting technique
; Numerical experiments
; Regional climate models
; Regional modeling
; Weather research and forecasting models
; Weather forecasting
; baroclinic mode
; climate modeling
; latitude
; meridional circulation
; numerical model
; regional climate
; troposphere
; uncertainty analysis
; weather forecasting
; zonal wind
; Atlantic Ocean
; Europe
; North America
; Pacific Ocean
英文摘要: Deficiencies of the nesting technique for regional models and their internal variability represent a significant source of uncertainties in regional model outputs. Presented numerical experiments on four different-size domains, two of them being midlatitude channel domains, show that the spatial structure and magnitude of uncertainties strongly depend on the domain size. The experiments are performed by using the Weather Research and Forecasting (WRF) model nested into the operational European Centre for Medium-Range Weather Forecasts (ECMWF) analyses on the same horizontal resolution 0.25°× 0.25° and by nesting WRF into a larger WRF domain with the same resolution. Uncertainties are quantified by the root-mean-square differences (rmsd) between the WRF results and their driving lateral boundary fields. The results from the midlatitude channel domain show that uncertainties in the tropospheric wind associated with the imperfect nesting method are amplified in the baroclinically active regions of the Atlantic and Pacific. The zonal wind rmsd have a dipole structure in the Atlantic in both the midlatitude channel and the half-channel simulations nested into ECMWF. The dipole is absent when WRF is nested into itself. On the contrary, the maximal rmsd for the meridional wind are always located in the domain center. When the domain centered on Europe excludes the western Atlantic and North America, the simulated uncertainties become spatially nearly homogeneous, and the magnitude of rmsd due to the imperfect nesting technique greatly reduces. Key Points Model differences influence uncertainties due to the nesting technique Pure nesting uncertainties are largest in the Atlantic In typical RCM domain for Europe, internal variability is nearly homogeneous © 2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63632
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia; Center of Excellence SPACE-SI, Ljubljana, Slovenia
Recommended Citation:
Žagar N.,Honzak L.,Žabkar R.,et al. Uncertainties in a regional climate model in the midlatitudes due to the nesting technique and the domain size[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(12)