Planetary Boundary Layer Parameterization for Tropical Cyclones Based on Generalized Similarity Theory.

Abstract

A planetary boundary layer (PBL) parameterization based on the generalized similarity theory (GST) was developed for tropical cyclone models. This parameterization, with only one layer, is necessary in modeling tropical cyclones for computational speed. The momentum, sensible heat and moisture fluxes are mutually dependent in this parameterization through non-dimensional gradient equations. The internal structure of the PBL is determined implicitly through universal functions. In comparison with a complex, one-dimensional, multi-year PBL model, the GST parameterization yields accurate moisture fluxes, but slightly overestimates the momentum flux and underestimates the sensible heat flux. The GST parameterization produces very realistic dynamics, energetics and thermal structure in an axisymmetric tropical cyclone model. This GST parameterization is judged superior to drag coefficient parameterization and is a good alternative to the more expensive, multi-layer parameterization. (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 20, 1980
Accession Number
ADA086781

Entities

People

  • Rangarao V. Madala
  • Simon Wei-jen Chang

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Boundary Layer
  • Coefficients
  • Energy
  • Energy Transfer
  • Equations
  • Geostrophic Wind
  • Heat Energy
  • Heat Flux
  • Heat Transfer
  • Inversion
  • Kinetic Energy
  • Latent Heat
  • Research Facilities
  • Stratified Fluids
  • Three Dimensional
  • Tropical Cyclones
  • Water Vapor

Readers

  • Integrated Circuit Design and Technology.
  • Ocean-Atmosphere Mesoscale Modeling, Data Assimilation, and Flux Boundary Layers
  • Regression Analysis.