Turbulent and Mesoscale Flow in Stable Conditions

Abstract

The structure of the nocturnal boundary layer has been examined using seven levels of eddy correlation data on the main tower in CASES99 data. Turbulence generated above the nocturnal surface layer and below the nocturnal jet intermittently bursts downward toward the surface This flow regime cannot be properly modeled within existing formulations. A z-less formulation of the transport is combined with a traditional model to improve simulation of these conditions. The relationship between advection of turbulence and local shear-generation of turbulence is examined using the network of eddy correlation stations in CASES99. Advection of turbulent patches significantly influences the relationship between turbulence and shear as viewed using a single tower.

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Document Details

Document Type
Technical Report
Publication Date
Jun 20, 2002
Accession Number
ADA429211

Entities

People

  • Larry J. Mahrt

Organizations

  • Oregon State University

Tags

DTIC Thesaurus Topics

  • Advection
  • Atmospheric Sciences
  • Boundaries
  • Boundary Layer
  • Data Sets
  • Demographic Cohorts
  • Fluid Mechanics
  • Information Operations
  • Layers
  • Mechanics
  • Military Research
  • Observation
  • Richardson Number
  • Simulations
  • Time Dependence
  • Transport Ships
  • Turbulence

Readers

  • Atmospheric Science/Meteorology
  • Computational Modeling and Simulation