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RISInert Trace Constituent Transport in Sigma and Hybrid Isentropic–Sigma Models. Part II: Twelve Semi-Lagrangian Algorithms
Publisher: American Meteorological Society
Abstract: Part I of this paper examined nine trace constituent advection algorithms as applied in channel versions of the University of Wisconsin hybrid isentropic?sigma (??σ) and sigma (σ) models. This paper examines the performance ...
Inert Trace Constituent Transport in Sigma and Hybrid Isentropic–Sigma Models. Part I: Nine Advection Algorithms
Publisher: American Meteorological Society
Abstract: The University of Wisconsin hybrid isentropic?sigma (??σ) coordinate channel model and the nominally identical sigma (σ) model are used to test the relative capabilities of nine trace constituent transport algorithms. The ...
A Comparison of Regional Isentropic-Sigma and Sigma Model Simulations of the January 1979 Chicago Blizzard
Publisher: American Meteorological Society
Abstract: In an initial effort in regional numerical weather prediction, results from the University of Wisconsin isentropic-sigma (UW ??σ) hybrid model and an ?identical? sigma model are compared. The two main objectives are to ...
Development and Initial Test of the University of Wisconsin Global Isentropic–Sigma Model
Publisher: American Meteorological Society
Abstract: The description of a global version of the University of Wisconsin (UW) hybrid isentropic-sigma (? ? σ) model and the results from an initial numerical weather prediction experiment are presented in this paper. The main ...
Assimilating GOES Brightness Temperatures. Part I: Upper-Tropospheric Moisture
Publisher: American Meteorological Society
Abstract: Imager channel 3 (at 6.7 ?m) on the Geostationary Operational Environmental Satellite (GOES) is particularly sensitive to water vapor in the atmosphere. Channel-3 data from both clear and cloudy regions are used in a new ...
Numerical Investigations with a Hybrid Isentropic–Sigma Model. Part I: Normal-Mode Characteristics
Publisher: American Meteorological Society
Abstract: In a validation experiment of a hybrid isentropic?sigma coordinate primitive equation model developed at the University of Wisconsin (the UW ??σ model), an initial value technique is used to investigate numerically the ...
Numerical Investigations with a Hybrid IsentropicσSigma Model. Part II: The Inclusion of Moist Processes
Publisher: American Meteorological Society
Abstract: The main goals of this paper are 1) to demonstrate the feasibility of incorporating a prognostic equation for water vapor and diabatic processes in the University of Wisconsin ??σ model discussed in Part I, 2) to document ...
A Comparison of Simulated Precipitation by Hybrid Isentropic-Sigma and Sigma Models
Publisher: American Meteorological Society
Abstract: The primary objectives of this study are threefold: 1) to compare simulators of dry and moist baroclinic development from 10-and 22-layer hybrid isentropic-sigma coordinate models with those from 11-, 27-, and 35-layer ...
A Two-Season Impact Study of Four Satellite Data Types and Rawinsonde Data in the NCEP Global Data Assimilation System
Publisher: American Meteorological Society
Abstract: Extended-length observing system experiments (OSEs) during two seasons are used to quantify the contributions made to forecast quality by conventional rawinsonde data and four types of remotely sensed satellite data. The ...
A Four-Season Impact Study of Rawinsonde, GOES, and POES Data in the Eta Data Assimilation System. Part I: The Total Contribution
Publisher: American Meteorological Society
Abstract: The impact of in situ rawinsonde (raob) data, remotely sensed Geostationary Operational Environmental Satellite (GOES), and Polar Operational Environmental Satellite (POES) data routinely used in NCEP?s Eta Data ...