A Lagrangian Approach to Studying Instantaneous Plume Dispersion and Concentration Fluctations
Abstract
The overall goal of the project was to develop a better understanding of plumes in the surface layer of the atmosphere on near-instantaneous time scales. In particular, an extensive database was acquired to characterize the diffusion of surface-level tracer plumes on short time scales for a range of meteorological conditions and amid a variety of surface roughness elements. Empirical and second-order closure methods were tested to predict the diffusion of plumes within 1 km of the source. A computer model was developed and tested to predict concentration fluctuations at fixed receptors located downwind of a ground-level contaminant source. Finally, a dual tracer instrument was developed to simultaneously measure fast-response concentrations of two tracers for use in the field to infer Lagrangian travel times of plume elements.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 30, 1998
- Accession Number
- ADA344446
Entities
People
- Brian K. Lamb
- Holly G. Peterson