Assessment and Computerized Modeling of the Environmental Deposition of Military Smokes. Characterization of the Atmospheric Boundary Layer in Complex Terrain and Results from the Amadeus Smoke Dispersion Experiments
Final rept. 1 Jul 1990-31 Dec 1991
ARGONNE NATIONAL LAB IL
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This report summarizes our analysis of the AMADEUS meteorological data Preliminary analysis also given in Brown et al. 1990 of these data for each of the smoke-release periods include 1 computation of averages of the surface-station and micrometeorological measurements wind speed, wind direction, temperature, 2 stability characterization by analysis of bulk Richardson numbers and wind direction standard deviations, 3 examination of vertical heat and momentum fluxes from sonic-anemometer data, 4 analysis of spectra computed using 1-Hz micrometeorological data and 5 determination of boundary-layer height from the instrumented balloon soundings. Additional results given in this report include 1 an analysis of vertical wind profiles, 2 comparisons of Meadowbrook data to similarity-based empirical relations and 3 a comprehensive analysis of the noctumal down-slope flows. The results show that the meteorological data are consistent, both internally and with other studies of the atmospheric boundary layer. The daytime convective conditions reveal a high degree of coherency, whereas the nighttime stable conditions are more spatially heterogeneous and less coherent. Analysis of surface-station data has shown that the characteristics of the nocturnal downslope flows in the Meadowbrook valleys are influenced by a combination of local cooling, local surface conditions and mesoscale drainage flows external to the Meadowbrook system. These data appear to offer significant potential for improving the state of dispersion modeling in this important area. RA 3, smoke, screening smoke, obscuring smoke, hexachloroethane, gas chromatography.
- Celestial Mechanics