| Summary: | Progress Code: completed Maintenance and Update Frequency: asNeeded Statement: Data from the NCEP R1 and R2 reanalysis/forecast system models with output for (1948-2003) (1979-2002) respectively including seasonal and monthly climatologies. Credit NOAA-CIRES CDC, Boulder, Colorado(http://www.cdc.noaa.gov/) - ongoing assistance. Harvey Davies - Tcl-nap training, CSIRO/Bureau of Meteorology Joint HPCCC - Assistance & Resources, CSIRO (CRL-Climate Research Laboratory). Credit Mark Collier Credit NCEP/NCAR/DOE (National Centers for Environmental Prediction). The NCEP/NCAR (National Center for Environmental Protection/National Center for Atmospheric Research) Re-analysis 1 project (NCEP R-1) is an analysis/forecast system to perform data assimilation using past data from 1948 to the present. In 1998 NCEP/DOE (National Center for Environmental Protection/Department of Energy) partnered to produce the Re-analysis 2 project (NCEP R-2) to address model and human errors identified in the old reanalysis R-1 model. Several error fixes were introduced in going from R-1 to R-2, most importantly the Southern Hemisphere bogus data problem (1979-1992) that rendered R-1 almost unusable for Southern Hemisphere extratropical investigations for the affected years. The oceanic albedo was too high by a factor of about two for the entire reanalysis period, may have affected the Southern more than the Northern Hemisphere because of the greater proportion of ocean surface. Other errors were found with the snow-cover analysis, discontinuities in the relative humidity and cloudiness relationship table and a snow-melt term and the presence of an undesired “spectral snow” feature. Output of the NCEP R-1 product continues to be released to the present day, however, R-2 has only been performed for the years of 1979-2002 for detailed evaluation. These datasets can be found on cherax in the subdirectories for R1 (other gauss, pressure, spectral, surface, surface gauss and tropopause), which match the names used by NCEP in their ...
|
|---|