Accession Number : ADA295701

Title :   Lagrangian Stochastic Modeling of Dispersion in the Planetary Boundary Layer.

Descriptive Note : Final rept. 15 May 90-4 Apr 95,

Corporate Author : COLORADO UNIV AT BOULDER

Personal Author(s) : Weil, Jeffrey C.

PDF Url : ADA295701

Report Date : 04 APR 1995

Pagination or Media Count : 14

Abstract : An existing Lagrangian stochastic model for dispersion in the convective boundary layer (CBL) was extended in two main ways. First, a model for the mean field dispersion in a rapidly-evolving CBL was developed and calculations of the crosswind-integrated concentration (CWIC) were carried out for a range of conditions. Second, a Lagrangian model for the CWIC and the mean and root-mean-square concentrations was developed that uses the velocity fields from large-eddy simulations as input. Calculations of the CWIC fields were made for three source heights and showed good agreement with the convection tank measurements of Willis and Deardorff. (AN)

Descriptors :   *MATHEMATICAL MODELS, *CONVECTION(ATMOSPHERIC), *PLANETARY ATMOSPHERES, VELOCITY, SIMULATION, STOCHASTIC PROCESSES, TIME DEPENDENCE, BOUNDARY LAYER, TURBULENT FLOW, PROBABILITY DENSITY FUNCTIONS, PARTICLES, HEAT FLUX, DISPERSIONS, LAGRANGIAN FUNCTIONS, CUMULUS CLOUDS, CROSSWINDS.

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE