DOI: 10.1002/jgrd.50158
论文题名: The role of snow-surface coupling, radiation, and turbulent mixing in modeling a stable boundary layer over Arctic sea ice
作者: Sterk H.A.M. ; Steeneveld G.J. ; Holtslag A.A.M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 3 起始页码: 1199
结束页码: 1217
语种: 英语
英文关键词: Arctic stable boundary layer
; GABLS
; modeling
; radiation
; surface coupling
; turbulent mixing
Scopus关键词: Boundary layers
; Heat radiation
; Models
; Parameterization
; Sea ice
; Sensitivity analysis
; Shock tubes
; Snow
; Turbulent flow
; Weather forecasting
; Wind effects
; GABLS
; Mesoscale meteorological model
; Model inter comparisons
; Parameterization schemes
; Stable boundary layer
; Surface coupling
; Turbulent mixing
; Weather research and forecasting
; Mixing
; boundary layer
; climate modeling
; land surface
; meteorology
; parameterization
; polar region
; sea ice
; sensitivity analysis
; weather forecasting
; Arctic Ocean
英文摘要: To enhance the understanding of the impact of small-scale processes in the polar climate, this study focuses on the relative role of snow-surface coupling, radiation and turbulent mixing in an Arctic stable boundary layer. We extend the GABLS1 (GEWEX Atmospheric Boundary-Layer Study 1) model intercomparison for turbulent mixing with the other relevant physical processes in the stable boundary layer over sea ice. We use the Single Column Model (SCM) version of the Weather Research and Forecasting (WRF) mesoscale meteorological model and run different combinations of boundary layer and radiation schemes, using a state-of-the art land surface scheme. With this intercomparison of schemes, we confirm a wide variety in the state of the atmosphere and the surface variables for the selected parameterization schemes. To understand this variety, a sensitivity analysis for one particular combination of parameterization schemes is performed, using a novel analysis method of process diagrams. The variation between the sensitivity runs indicates a relative orientation of model sensitivities to variations in each of the governing processes and these can explain the variety of model results obtained in the intercomparison of different parameterization schemes. Moreover, we apply the same method for several geostrophic wind speeds to represent a large range of synoptic conditions. Results indicate a shift in process significance for different wind regimes. For low wind regimes, the model sensitivity is larger for surface coupling and radiation, while for high wind speeds, the largest sensitivity is found for the turbulent mixing process. An interesting non-linear feature was found for turbulent mixing for frequently occurring wind speeds and low wind speed cases, where the 2 m temperature increases for decreased amounts of mixing. Key PointsRelative impact of governing processes of the Arctic SBL depends on geo-windThe 2 m temperature changes nonlinearly for varying turbulent mixing strengthsModel sensitivity critically depends on mixing in both surface layer and PBL ©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/63951
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: Meteorology and Air Quality Section, Wageningen University, PO Box 47, 6700 AA, Wageningen, Netherlands
Recommended Citation:
Sterk H.A.M.,Steeneveld G.J.,Holtslag A.A.M.. The role of snow-surface coupling, radiation, and turbulent mixing in modeling a stable boundary layer over Arctic sea ice[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(3)