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Tropical Cyclone Evolution via Potential Vorticity Anomalies in a Three-Dimensional Balance Model
Publisher: American Meteorological Society
Abstract: A new mechanism of vortex intensification by convectively forced vortex Rossby waves was proposed by Montgomery and Kallenbach. As demonstrated by them, the axisymmetrization process is described by vortex Rossby waves ...
Potential Vorticity Inversion for Tropical Cyclones Using the Asymmetric Balance Theory
Publisher: American Meteorological Society
Abstract: A three-dimensional model is developed, based upon the recently derived asymmetric balance (AB) formulation of Shapiro and Montgomery, to study the evolution of rapidly rotating vortices, including hurricanes. A particular ...
Balanced Contributions to the Intensification of Hurricane Opal as Diagnosed from a GFDL Model Forecast
Publisher: American Meteorological Society
Abstract: Stationary and propagating asymmetric features of atmospheric or oceanic origin near a hurricane are known to have an impact on its evolution. Although theoretical and observational studies have investigated the influence ...
Influence of Atmospheric Asymmetries on the Intensification of GFDL Model Forecast Hurricanes
Publisher: American Meteorological Society
Abstract: Hurricanes Bertha of 1996 and Erin of 2001 both intensified rapidly during part of their time over the North Atlantic. A piecewise potential vorticity (PV) inversion is applied to model output from GFDL hurricane model ...
Vortex Rossby Waves and Hurricane Intensification in a Barotropic Model
Publisher: American Meteorological Society
Abstract: In this study the balanced evolution of small but finite as well as large-amplitude asymmetries in a rapidly rotating hurricane-like vortex is investigated. In particular, the wave kinematics and wave?mean flow interaction ...
Influences of Asymmetric Heating on Hurricane Evolution in the MM5
Publisher: American Meteorological Society
Abstract: While previous idealized studies have demonstrated the importance of asymmetric atmospheric features in the intensification of a symmetric tropical cyclone vortex, the role of convectively generated asymmetries in creating ...
Linear and Nonlinear Vortex Motion in an Asymmetric Balance Shallow Water Model
Publisher: American Meteorological Society
Abstract: This work extends asymmetric balance (AB) theory to the beta plane (?-AB). The physical problem examined is the motion of a coherent vortex on a beta plane in a finite depth fluid in the absence of an environmental steering ...
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