You are here

proxy for high-resolution regional reanalysis for the Southeast United States

Title: A proxy for high-resolution regional reanalysis for the Southeast United States: assessment of precipitation variability in dynamically downscaled reanalyses.
110 views
211 downloads
Name(s): Stefanova, Lydia, author
Misra, Vasubandhu, author
Chan, Steven, author
Griffin, Melissa, author
O'Brien, James J., author
Smith, III, Thomas, author
Type of Resource: text
Genre: Text
Issuance: serial
Date Issued: 2011
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: A variety of practical applications, such as hydrological and ecological modeling, require high-resolution meteorological data sets. A crucial, yet notoriously difficult to model, component of such data sets is precipitation. Here, we present an analysis of the seasonal, subseasonal, and diurnal variability of rainfall from the COAPS Land-Atmosphere Regional Reanalysis for the Southeast at 10-km resolution (CLARReS10). Most of our analysis focuses on the representation of summertime subseasonal and diurnal variability. Summer precipitation in the Southeast is a particularly challenging modeling problem because of the variety of regional-scale phenomena, such as sea breeze, thunderstorms and squall lines, tropical storms, and hurricanes, which are barely resolved in coarse atmospheric reanalyses, but which contribute significantly to the hydrological budget over the region. The National Centers for Environmental Prediction (NCEP) - Department of Energy (DOE) Reanalysis II (R2) and the European Centre for Medium-Range Weather Forecast (ECMWF) 40-year Reanalysis (ERA40) have been dynamically downscaled with the NCEP/Experimental Climate Prediction Center (ECPC) Regional Spectral Model (RSM). The downscaling has been performed over the Southeast United States at a horizontal resolution of 10 km for the period 1979-2001. The resulting regional reanalyses are compared to gridded observations and station data. We find that the downscaled reanalyses show good agreement with observations in terms of both the relative seasonal distribution and the diurnal structure of precipitation. The spatial distribution of precipitation has a wet bias over most of the region. There are noticeable differences between the two simulations: CLARReS10-ERA40 (the downscaled ERA40) tends to be wetter than CLARReS10-R2 (the downscaled R2), and the diurnal precipitation maximum occurs earlier in the day in CLARReS10- ERA40
Identifier: FSU_migr_coaps_pubs-0027 (IID), 10.1007/s00382-011-1230-y (DOI)
Keywords: Southeast US, Precipitation, Hydroclimate, diurnal variability, Seasonal variability, Dynamical downscaling, Reanalysis
Note: Published in Climate Dynamics.
Citation: Stefanova, L., V. Misra, S. C. Chan, M. Griffin, J. J. O'Brien, and T. J. Smith III (2012), A proxy for high-resolution regional reanalysis for the Southeast United States: assessment of precipitation variability in dynamically downscaled reanalyses, Climate Dynamics, 38(11-12), 2449-2466, doi:10.1007/s00382-011-1230-y.
Subject(s): Atmospheric sciences
Meteorology
Oceanography
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_migr_coaps_pubs-0027
Owner Institution: FSU
Is Part of Series: COAPS Publications.
Is Part Of: Climate Dynamics.
Issue: 42320, 38

Choose the citation style.
Stefanova, L., Misra, V., Chan, S., Griffin, M., O'Brien, J. J., & Smith, III, T. (2011). A proxy for high-resolution regional reanalysis for the Southeast United States: assessment of precipitation variability in dynamically downscaled reanalyses. Climate Dynamics. Retrieved from http://purl.flvc.org/fsu/fd/FSU_migr_coaps_pubs-0027