Regional Reanalysis

Welcome to the CLARReS10 (short for "COAPS Land-Atmosphere Regional REanalysis for the Southeast at 10km resolution") data repository located at ftp://www.coaps.fsu.edu/pub/Southeast/CLARReS10.

In this project, two regional reanalyses have been created by dynamically downscaling two existing global reanalyses: the NCEP/DOE Reanalysis II (hereafter R2) and the ECMWF-ERA40 (hereafter ERA40).

The dynamical model used for the regional downscaling was the NCAR/SCRIPPS Regional Spectral Model, RSM (Juang, H. H., and M. Kanamitsu, 1994). Within this model, we have used the Simplified Arakawa-Schubert Scheme (SAS; Pan and Wu, 1995) to parameterize deep convection, and the Noah land surface scheme (Ek et al, 2003) to parameterize the land surface processes. Lateral boundary conditions have been provided by either R2 (for CLARReS10/R2) or ERA40 (for CLARReS10/ERA40) at 6 hour intervals throughout the integration. Scale-selective bias correction (Kanamitsu and Kanamaru, 2007) has been used to preserve the large scale features of the boundary forcing within the regional domain.

Both regional reanalyses cover the period 01Jan1979 to 31Dec2001. The regional domain, after removal of spurious sponge zone, is 24N to 36N, and 270W to 284W.

Two-dimensional fields are output every hour, while three-dimensional fields (temperature, winds, humidity and geopotential) are output every three hours.

The performance of CLARReS10 in reproducing the observed spatio-temporal structure of rainfall in the Southeast is ilustrated by the following manuscript A Proxy for High-Resolution Regional Reanalysis for the Southeast United States: Assessment of Precipitation Variability in Dynamically Downscaled Reanalyses (Clim Dyn 2011, DOI: 10.1007/s00382-011-1230-y).

Verifications of additional fields with observations, as well as comparisons with other regional reanalysis products will be be posted at ftp://www.coaps.fsu.edu/pub/Southeast/CLARReS10/Documentation as they become available.

Please use the following reference for this data set:
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Stefanova, L., V. Misra, S. C. Chan, M. Griffin, J. J. O’Brien, and T. J. Smith III, 2011: A proxy for high-resolution regional reanalysis for the Southeast United States: Assessment of precipitation variability in dynamically downscaled reanalyses. Clim Dyn, DOI: 10.1007/s00382-011-1230-y

Timetable of data availability
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*Request additional variables by contacting Lydia Stefanova

Field		Name		Units
Hourly precipitation		pratesfc		[kg/m^2/s]
Hourly 2-m specific humidity		spfh2m		[kg/kg]
U, V at 10m		ugrd10m, vgrd10m		[m/s]
Temperature at 2m		tmp2m		[K]
SFC Downward short wave flux		dswrfsfc		[W/m^2]
SFC Latent heat flux		lhtflsfc		[W/m^2]
SFC Snowfall rate water equiv.		srweqsfc		[kg/m^2/s]
SFC Ground heat flux		gfluxsfc		[W/m^2]
SFC Roughness		sfcrsfc		[m]
SFC Sensible heat flux		shtflsfc		[W/m^2]
SFC Pressure		pressfc		[Pa]
Daily 2-m Tmin and Tmax		daily/tmin2m		[K]
		daily/tmax2m		[K]

latest edit: 2/16/2011 by Lydia Stefanova