DOI: 10.1007/s00382-013-2031-2
Scopus记录号: 2-s2.0-84891397789
论文题名: Improvements in WRF simulation skills of southeastern United States summer rainfall: physical parameterization and horizontal resolution
作者: Li L. ; Li W. ; Jin J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期: 2017-07-08 起始页码: 2077
结束页码: 2091
语种: 英语
英文关键词: Cumulus parameterization scheme
; Horizontal resolution
; Southeastern United States
; Summer rainfall
; Weather research and forecasting (WRF) model
英文摘要: Realistic regional climate simulations are important in understanding the mechanisms of summer rainfall in the southeastern United States (SE US) and in making seasonal predictions. In this study, skills of SE US summer rainfall simulation at a 15-km resolution are evaluated using the weather research and forecasting (WRF) model driven by climate forecast system reanalysis data. Influences of parameterization schemes and model resolution on the rainfall are investigated. It is shown that the WRF simulations for SE US summer rainfall are most sensitive to cumulus schemes, moderately sensitive to planetary boundary layer schemes, and less sensitive to microphysics schemes. Among five WRF cumulus schemes analyzed in this study, the Zhang–McFarlane scheme outperforms the other four. Further analysis suggests that the superior performance of the Zhang–McFarlane scheme is attributable primarily to its capability of representing rainfall-triggering processes over the SE US, especially the positive relationship between convective available potential energy and rainfall. In addition, simulated rainfall using the Zhang–McFarlane scheme at the 15-km resolution is compared with that at a 3-km convection-permitting resolution without cumulus scheme to test whether the increased horizontal resolution can further improve the SE US rainfall simulation. Results indicate that the simulations at the 3-km resolution do not show obvious advantages over those at the 15-km resolution with the Zhang–McFarlane scheme. In conclusion, our study suggests that in order to obtain a satisfactory simulation of SE US summer rainfall, choosing a cumulus scheme that can realistically represent the convective rainfall triggering mechanism may be more effective than solely increasing model resolution. © 2014, Springer-Verlag Berlin Heidelberg. 资助项目: NIH, National Institutes of Health
; NSF, National Science Foundation
; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54617
Appears in Collections: 过去全球变化的重建
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作者单位: Earth and Ocean Sciences, Nicholas School of the Environment and Earth Sciences, Duke University, 322 Old Chem. Bldg, P.O. Box 90227, Durham, NC, United States; Department of Watershed Sciences and Department of Plants, Soils and Climate, Utah State University, Logan, UT, United States
Recommended Citation:
Li L.,Li W.,Jin J.. Improvements in WRF simulation skills of southeastern United States summer rainfall: physical parameterization and horizontal resolution[J]. Climate Dynamics,2014-01-01,43(2017-07-08)