globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-011-1230-y
Scopus记录号: 2-s2.0-84861817758
论文题名:
A proxy for high-resolution regional reanalysis for the Southeast United States: Assessment of precipitation variability in dynamically downscaled reanalyses
作者: Stefanova L.; Misra V.; Chan S.; Griffin M.; O'Brien J.J.; Smith III T.J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 38, 期:2017-11-12
起始页码: 2449
结束页码: 2466
语种: 英语
英文关键词: Diurnal variability ; Dynamical downscaling ; Hydroclimate ; Precipitation ; Reanalysis ; Seasonal variability ; Southeast US
英文摘要: We present an analysis of the seasonal, subseasonal, and diurnal variability of rainfall from COAPS Land-Atmosphere Regional Reanalysis for the Southeast at 10-km resolution (CLARReS10). Most of our assessment focuses on the representation of summertime subseasonal and diurnal variability. Summer precipitation in the Southeast United States is a particularly challenging modeling problem because of the variety of regional-scale phenomena, such as sea breeze, thunderstorms and squall lines, which are not adequately resolved in coarse atmospheric reanalyses but contribute significantly to the hydrological budget over the region. We find that the dynamically downscaled reanalyses are in good agreement with station and gridded observations in terms of both the relative seasonal distribution and the diurnal structure of precipitation, although total precipitation amounts tend to be systematically overestimated. The diurnal cycle of summer precipitation in the downscaled reanalyses is in very good agreement with station observations and a clear improvement both over their "parent" reanalyses and over newer-generation reanalyses. The seasonal cycle of precipitation is particularly well simulated in the Florida; this we attribute to the ability of the regional model to provide a more accurate representation of the spatial and temporal structure of finer-scale phenomena such as fronts and sea breezes. Over the northern portion of the domain summer precipitation in the downscaled reanalyses remains, as in the "parent" reanalyses, overestimated. Given the degree of success that dynamical downscaling of reanalyses demonstrates in the simulation of the characteristics of regional precipitation, its favorable comparison to conventional newer-generation reanalyses and its cost-effectiveness, we conclude that for the Southeast United states such downscaling is a viable proxy for high-resolution conventional reanalysis. © 2011 Springer-Verlag.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55267
Appears in Collections:过去全球变化的重建

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作者单位: Center for Ocean-Atmospheric Prediction Studies (COAPS), The Florida State University, Tallahassee, FL, United States; Department of Earth, Ocean and Atmospheric Science, The Florida State University, Tallahassee, FL, United States; School of Civil Engineering and Geosciences, Newcastle University, Newcastle-upon-Tyne, United Kingdom; Met Office Hadley Centre, Exeter, United Kingdom; Southeast Ecological Science Center, U.S. Geological Survey (USGS), St. Petersburg, FL, United States

Recommended Citation:
Stefanova L.,Misra V.,Chan S.,et al. A proxy for high-resolution regional reanalysis for the Southeast United States: Assessment of precipitation variability in dynamically downscaled reanalyses[J]. Climate Dynamics,2012-01-01,38(2017-11-12)
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