DOI: 10.1002/jgrd.50773
论文题名: Nonhydrostatic nested climate modeling: A case study of the 2010 summer season over the western United States
作者: Lebassi-Habtezion B. ; Diffenbaugh N.S.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 19 起始页码: 10944
结束页码: 10962
语种: 英语
英文关键词: high resolution modeling ove western US
; netsted climate modeling
; Non-hydrostatic modeling of the western USA
; North American Monsoon
; regional climate modeling
; western US climate modeling
Scopus关键词: Atmospheric temperature
; Computer simulation
; Hydraulics
; Research
; Weather forecasting
; Atmospheric circulation
; High-resolution models
; Nonhydrostatic model
; North American
; Regional climate modeling
; Superparameterization
; Weather Research and Forecast models
; Western United States
; Climate models
; atmospheric circulation
; climate modeling
; computer simulation
; data set
; forecasting method
; greenhouse gas
; heterogeneity
; numerical model
; observational method
; orography
; precipitation (climatology)
; regional climate
; surface temperature
; wind velocity
; United States
英文摘要: The potential importance of local-scale climate phenomena motivates development of approaches to enable computationally feasible nonhydrostatic climate simulations. To that end, we evaluate the potential viability of nested nonhydrostatic model approaches, using the summer climate of the western United States (WUSA) as a case study. We use the Weather Research and Forecast (WRF) model to carry out five simulations of summer 2010. This suite allows us to test differences between nonhydrostatic and hydrostatic resolutions, single and multiple nesting approaches, and high- and low-resolution reanalysis boundary conditions. WRF simulations were evaluated against station observations, gridded observations, and reanalysis data over domains that cover the 11 WUSA states at nonhydrostatic grid spacing of 4 km and hydrostatic grid spacing of 25 km and 50 km. Results show that the nonhydrostatic simulations more accurately resolve the heterogeneity of surface temperature, precipitation, and wind speed features associated with the topography and orography of the WUSA region. In addition, we find that the simulation in which the nonhydrostatic grid is nested directly within the regional reanalysis exhibits the greatest overall agreement with observational data. Results therefore indicate that further development of nonhydrostatic nesting approaches is likely to yield important insights into the response of local-scale climate phenomena to increases in global greenhouse gas concentrations. However, the biases in regional precipitation, atmospheric circulation, and moisture flux identified in a subset of the nonhydrostatic simulations suggest that alternative nonhydrostatic modeling approaches such as superparameterization and variable-resolution global nonhydrostatic modeling will provide important complements to the nested approaches tested here. Key Points Viability of nested non-hydrostatic nested model approaches over large domain Evaluation of hydrostatic and non-hydrostatic WRF against obs Non-hydrostatic WRF biases: A case study over Western US ©2013. American Geophysical Union. All Rights Reserved. 资助项目: 0955283
; 1R01AI090159-01
; DE-SC005171
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63283
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: Department of Environmental Earth System Science, Woods Institute for the Environment, Stanford University, Stanford, CA 94305-4216, United States
Recommended Citation:
Lebassi-Habtezion B.,Diffenbaugh N.S.. Nonhydrostatic nested climate modeling: A case study of the 2010 summer season over the western United States[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(19)