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Integration of a tropical cyclone model on a nested grid
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1976
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Description:A system of nested grids has been designed for the National Hurricane and Experimental Meteorology Laboratory (NHEML) threelevel , three-dimensional model of a tropical cyclone. The inner two of the system of three nested grids move with the center of the cyclone. The nested grids are fully interacting. The nested grid system has been tested by means of several numerical experiments. In the original series of experiments the grids are stationary and no environment current is present. Results were obtained for a 2700 x 2700 km domain with uniform 90-km resolution, with a 30-km grid nested within the 90-km grid, and finally, with a 10-km grid nested within the 30- and 90-km grids. The vortex decayed on the 90-km grid, grew to hurricane strength of 52 m s-1 on the 30-km grid, and grew to 78 m s-1 on the 10-km grid. The moving grids were introduced with 10-km resolution to follow the motion of the vortex from 90 to 178 hours. The motion is self-induced by the asymmetry of the outflow layer. The structure of this vortex is discussed.
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Rights Information:CC0 Public Domain
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Compliance:Library
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