Numerical Simulation of Tropical Cyclone Development with Latent Heat Release by the Resolvable Scales I: Model Description and Preliminary Results

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  • 1 National Hurricane and Experimental Meteorology Laboratory, NOAA, Coral Gables, Fla. 33124
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Abstract

Axisymmetric hurricane simulators with a hydrostatic model, in which the release of latent heat occurs totally in convective elements that are explicitly resolved on a 20 km horizontal grid, are presented. It is shown that there is good reason to believe that the failures of earlier attempts in this direction were due to model and experimental design. A fairly complete description of the model is given. The solutions do not depend upon overly large lateral mixing coefficients nor upon artificial numerical smoothing procedures. The relationship between this work and CISK theories of hurricane development is discussed. The impact of this work on cumulus parameterization studies is also discussed.

Abstract

Axisymmetric hurricane simulators with a hydrostatic model, in which the release of latent heat occurs totally in convective elements that are explicitly resolved on a 20 km horizontal grid, are presented. It is shown that there is good reason to believe that the failures of earlier attempts in this direction were due to model and experimental design. A fairly complete description of the model is given. The solutions do not depend upon overly large lateral mixing coefficients nor upon artificial numerical smoothing procedures. The relationship between this work and CISK theories of hurricane development is discussed. The impact of this work on cumulus parameterization studies is also discussed.

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