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RISOn Spectral Energetics of Resonantly Interacting Waves in the Two-Layer Baroclinic Model
Publisher: American Meteorological Society
Abstract: Spectral energetics associated with an N-wave system composed of a marginally unstable and N/1 neutral waves, interacting resonantly in triad configurations, are examined in the context of the two-layer baroclinic model. ...
Dynamics of Vortex Asymmetries and Their Influence on Vortex Motion on a β-plane
Publisher: American Meteorological Society
Abstract: A linear nondivergent barotropic model is developed to obtain the asymmetric circulation associated with a vortex moving on the ?-plane. The total system is transformed to a coordinate system moving with the vortex. The ...
Spatial Instability of a Baroclinic Current with Slow Streamwise Variation
Publisher: American Meteorological Society
Abstract: Spatial baroclinic instability in a mean flow with slow streamwise variation is studied with the quasi-geostrophic two-layer model. The two-scale expansion technique which was employed by Peng and Williams is used in this ...
Effects of Vertical Shears and Midlevel Dry Air on Tropical Cyclone Developments
Publisher: American Meteorological Society
Abstract: set of idealized experiments using the Weather Research and Forecasting model (WRF) were designed to investigate the impacts of a midlevel dry air layer, vertical shear, and their combined effects on tropical cyclone (TC) ...
Cyclogenesis Simulation of Typhoon Prapiroon (2000) Associated with Rossby Wave Energy Dispersion
Publisher: American Meteorological Society
Abstract: The genesis of Typhoon Prapiroon (2000), in the western North Pacific, is simulated to understand the role of Rossby wave energy dispersion of a preexisting tropical cyclone (TC) in the subsequent genesis event. Two ...
Impacts of SSM/I Retrieved Rainfall Rates on Numerical Prediction of a Tropical Cyclone
Publisher: American Meteorological Society
Abstract: Special Sensor Microwave/Imager (SSM/I) retrieved rainfall rates were assimilated into a limited-area numerical prediction model in an attempt to improve the initial analysis and forecast of a tropical cyclone. Typhoon Flo ...
Sensitivity of Tropical Cyclone Forecasts as Revealed by Singular Vectors
Publisher: American Meteorological Society
Abstract: Singular vector (SV) sensitivity, calculated using the adjoint model of the U.S. Navy Operation Global Atmosphere Prediction System (NOGAPS), is used to study the dynamics associated with tropical cyclone evolution. For ...
Spatial Instability of the Barotropic Jet with Slow Streamwise Variation
Publisher: American Meteorological Society
Abstract: A two-scale expansion technique is used to study the barotropic instability of basic flows with slow streamwise variation. Disturbances in nonparallel flow possess properties that differ from those calculated from parallel ...
Evaluating Tropical Cyclone Forecasts from the NCEP Global Ensemble Forecasting System (GEFS) Reforecast Version 2
Publisher: American Meteorological Society
Abstract: ropical cyclone (TC) forecasts from the NCEP Global Ensemble Forecasting System (GEFS) Reforecast version 2 (1985?2012) were evaluated from the climate perspective, with a focus on tropical cyclogenesis. Although the GEFS ...
Roles of the Synoptic-Scale Wave Train, the Intraseasonal Oscillation, and High-Frequency Eddies in the Genesis of Typhoon Manyi (2001)
Publisher: American Meteorological Society
Abstract: xperiments using the Weather Research and Forecasting (WRF) Model were conducted to investigate the effects of multiscale motions on the genesis of Typhoon Manyi (2001) in the western North Pacific. The precursor signal ...