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RISA Solution for Boundary Problems in Isentropic Coordinate Models
Publisher: American Meteorological Society
Abstract: A numerical model is designed to integrate the primitive equations in two dimensions to evaluate a new vertical coordinate scheme for hydrostatic flow. Because potential temperature is nearly conserved for large-scale ...
The Regional Analysis System for the Operational “Early” Eta Model: Original 80-km Configuration and Recent Changes
Publisher: American Meteorological Society
Abstract: The analysis component of the National Centers for Environmental Prediction (NCEP) operational ?early? 80-km eta model, as implemented in July 1993, is described. This optimum interpolation (OI) analysis is fully multivariate ...
The Step-Mountain Coordinate: Model Description and Performance for Cases of Alpine Lee Cyclogenesis and for a Case of an Appalachian Redevelopment
Publisher: American Meteorological Society
Abstract: The problem of the pressure gradient force error in the case of the terrain-following (sigma) coordinate does not appear to have a solution. The problem is not one of truncation error in the calculation of space derivatives ...
Changes to the Operational “Early” Eta Analysis/Forecast System at the National Centers for Environmental Prediction
Publisher: American Meteorological Society
Abstract: This note describes changes that have been made to the National Centers for Environmental Prediction (NCEP) operational ?early? eta model. The changes are 1) an decrease in horizontal grid spacing from 80 to 48 km, 2) ...