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SIIA Público
SISTEMA INTEGRAL DE INFORMACIÓN ACADÉMICA - PÚBLICO
Título del libro: Vortex Structures In Fluid Dynamic Problems Título del capítulo: Interaction of Tropical Cyclones with a Dipole Vortex
polar vortices Venus; barotropic vorticity equation; normal mode instability; tropical cyclone; American monsoon system
Resumen:
The purpose of this chapter is to discuss certain disturbances around
the pole of a Venus-type planet that result as a response to barotropic
instability processes in a zonal flow. We discuss a linear instability
of normal modes in a zonal flow through the barotropic vorticity
equations (BVEs). By using a simple idealization of a zonal flow, the
instability is employed on measurements of the upper atmosphere of
Venus. In 1998, the tropical cyclone Mitch gave way to the observational
study of a dipole vortex. This dipole vortex might have helped to
intensify the cyclone and moved it towards the SW. In order to examine
this process of interaction, the nonlinear BVE was integrated in time
applied to the 800-200 hPa average layer in the previous moment when it
moved towards the SW. The 2-day integrations carried out with the model
showed that the geometric structure of the solution can be calculated to
a good approximation. The solution HLC moves very fast westwards as
observed. On October 27, the HLA headed north-eastward and then became
quasi-stationary. It was also observed that HLA and HLC as a coupled
system rotates in the clockwise direction.
