DOI: 10.1002/jgrd.50590
论文题名: Effects of spatial resolution in the simulation of daily and subdaily precipitation in the southwestern US
作者: Tripathi O.P. ; Dominguez F.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 14 起始页码: 7591
结束页码: 7605
语种: 英语
英文关键词: Extreme precipitation
; Regional Climate Modeling
; Southwestern US precipitation
Scopus关键词: Precipitation (meteorology)
; Convective parameterization schemes
; Eastward propagation
; Extreme precipitation
; Extreme precipitation events
; High resolution simulations
; National climate data centers
; Regional climate modeling
; Regional climate simulation
; Image resolution
; numerical model
; parameterization
; precipitation (climatology)
; regional climate
; resolution
; spatial resolution
; Arizona
; New Mexico
; United States
英文摘要: We evaluate the effects of spatial resolution on the ability of a regional climate model to reproduce observed extreme precipitation for a region in the Southwestern United States. A total of 73 National Climate Data Center observational sites spread throughout Arizona and New Mexico are compared with regional climate simulations at the spatial resolutions of 50 km and 10 km for a 31 year period from 1980 to 2010. We analyze mean, 3-hourly and 24-hourly extreme precipitation events using WRF regional model simulations driven by NCEP-2 reanalysis. The mean climatological spatial structure of precipitation in the Southwest is well represented by the 10 km resolution but missing in the coarse (50 km resolution) simulation. However, the fine grid has a larger positive bias in mean summer precipitation than the coarse-resolution grid. The large overestimation in the simulation is in part due to scale-dependent deficiencies in the Kain-Fritsch convective parameterization scheme that generate excessive precipitation and induce a slow eastward propagation of the moist convective summer systems in the high-resolution simulation. Despite this overestimation in the mean, the 10 km simulation captures individual extreme summer precipitation events better than the 50 km simulation. In winter, however, the two simulations appear to perform equally in simulating extremes. Key Points Higher resolution simulation better reproduced observations Higher resolution simulation appears to overestimate climatological mean Overestimation in higher resolution predominates in mountaneous terrain ©2013. American Geophysical Union. All Rights Reserved. 资助项目: 1038938
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63548
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 Meteorology, University of Reading, Reading RG6 6BB, United Kingdom; Department of Atmospheric Sciences, University of Arizona, Tucson AZ, United States
Recommended Citation:
Tripathi O.P.,Dominguez F.. Effects of spatial resolution in the simulation of daily and subdaily precipitation in the southwestern US[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(14)