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RISBoundary Layer Clouds in a Global Atmospheric Model: Simple Cloud Cover Parameterizations
Publisher: American Meteorological Society
Abstract: Subtropical boundary layer clouds have a fundamental role on the radiative budget of the atmosphere and on the modulation of the tropical circulations. The development of realistic parameterizations of these clouds in ...
The Role of the Annual-Mean Climate on Seasonal and Interannual Variability of the Tropical Pacific in a Coupled GCM
Publisher: American Meteorological Society
Abstract: The role of the annual-mean climate on seasonal and interannual variability in the tropical Pacific is investigated by means of a coupled atmosphere?ocean general circulation model. The atmospheric component of this coupled ...
The Description of the Navy Operational Global Atmospheric Prediction System's Spectral Forecast Model
Publisher: American Meteorological Society
Abstract: We present a description of the development of the spectral forecast components of the Navy Operational Global Atmospheric Prediction System (NOGAPS). The original system, called 3.0, was introduced in January 1988. New ...
Sensitivity Studies of the Navy's Global Forecast Model Parameterizations and Evaluation of Improvements to NOGAPS
Publisher: American Meteorological Society
Abstract: The purpose of this paper is to discuss the major systematic errors of the U.S. Navy Operational Global Atmospheric Prediction System (NOGAPS), version 3.2, and to describe several tuning experiments of NOGAPS parameterizations. ...
The Impact of Convective Momentum Transport on Tropical Cyclone Track Forecasts Using the Emanuel Cumulus Parameterization
Publisher: American Meteorological Society
Abstract: The influence of convective momentum transport (CMT) on tropical cyclone (TC) track forecasts is examined in the Navy Operational Global Atmospheric Prediction System (NOGAPS) with the Emanuel cumulus parameterization. ...
Implementation of a Stochastic Eddy-Diffusivity/Mass-Flux Parameterization into the Navy Global Environmental Model
Publisher: American Meteorological Society
Abstract: unified boundary layer and shallow convection parameterization based on a stochastic eddy-diffusivity/mass-flux (EDMF) approach is implemented and tested in the Navy Global Environmental Model (NAVGEM). The primary goals ...
Dynamic and Thermodynamic Regulation of Ocean Warming
Publisher: American Meteorological Society
Abstract: The relative roles of clouds, surface evaporation, and ocean heat transport in limiting maximum sea surface temperatures (SSTs) in the western Pacific warm pool are investigated by means of simple and intermediate coupled ...
Extratropical Transition of Tropical Cyclones over the Western North Pacific. Part II: The Impact of Midlatitude Circulation Characteristics
Publisher: American Meteorological Society
Abstract: Two characteristic midlatitude circulation patterns (labeled northwest and northeast) are found to be associated with extratropical transition (ET) of tropical cyclones over the western North Pacific Ocean. Although in ...
Recent Modifications of the Emanuel Convective Scheme in the Navy Operational Global Atmospheric Prediction System
Publisher: American Meteorological Society
Abstract: The convective parameterization of Emanuel has been employed in the forecast model of the Navy Operational Global Atmospheric Prediction System (NOGAPS) since 2000, when it replaced a version of the relaxed Arakawa?Schubert ...
Generation of a Quasi-Biennial Oscillation in an NWP Model Using a Stochastic Gravity Wave Drag Parameterization
Publisher: American Meteorological Society
Abstract: any operational numerical weather prediction (NWP) systems now extend into the stratosphere and are beginning to be used to generate forecasts beyond conventional 5?10-day periods out to seasonal time scales. Past observational ...