Further Development and Testing of a Second-Order Bulk Boundary Layer Model

Abstract

A one-layer bulk boundary layer model is developed. The model predicts the mixed layer values of the potential temperature, mixing ratio, and u- and v-momentum. The model also predicts the depth of the boundary layer and the vertically integrated turbulence kinetic energy (TKE). The TKE is determined using a second-order closure that relates the rate of dissipation to the TKE. The fractional area covered by rising motion sigma and the entrainment rate (E) are diagnostically determined. The model is used to study the clear convective boundary layer (CBL) using data from the Wangara, Australia boundary layer experiment. The Wangara data is also used as an observation base to validate model results. A further study is accomplished by simulating the planetary boundary layer (PBL) over an ocean surface. This study is designed to find the steady-state solutions of the prognostic variable

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Document Details

Document Type
Technical Report
Publication Date
May 03, 1993
Accession Number
ADA268071

Entities

People

  • Richard D. Krasner

Organizations

  • Air Force Institute of Technology

Tags

DTIC Thesaurus Topics

  • Atmospheric Sciences
  • Boundary Layer
  • Boundary Layer Transition
  • Buoyancy
  • Climate Change
  • Convection
  • Difference Equations
  • Differential Equations
  • Energy
  • Equations
  • Kinetic Energy
  • Simulations
  • Steady State
  • Temperature Gradients
  • Transitions
  • Turbulence
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Ocean-Atmosphere Mesoscale Modeling, Data Assimilation, and Flux Boundary Layers