Plume Dispersion in the Convective Boundary Layer. Part II: Analyses of CONDORS Field Experiment Data
- 1 August 1993
- journal article
- Published by American Meteorological Society in Journal of Applied Meteorology and Climatology
- Vol. 32 (8) , 1388-1425
- https://doi.org/10.1175/1520-0450(1993)032<1388:pditcb>2.0.co;2
Abstract
Extensive analyses are performed on data from the CONDORS (convective diffusion observed with remote sensors) field experiment, described in detail by Ebeerhard et al. Convective scaling is used to facilitate comparisons with laboratory and numerical simulations and to give the results generality. Near-surface χ/Q from lidar-detected oil fog are generally in excellent agreement with nearby samples of coreleased SF6, considering the large spatial gradients found in the oil fog. Extrapolations to the surface of ∫χdy/Q of radar-detected “chaff” agree reasonably well with most oil fog values after a mathematical compensation for the chaff's settling speed. Measured wind direction distributions compare favorably with ∫χdy and ∫χdz distributions of both tracers. The directly measured bulk variables σy, and σz, show little effect of source height or of tracer type except that surface-released σy are enhanced by up to 60% at X<0.3 [X =(x/U)w*/zi, where U is mean wind speed, w* is the convective scale vel... Abstract Extensive analyses are performed on data from the CONDORS (convective diffusion observed with remote sensors) field experiment, described in detail by Ebeerhard et al. Convective scaling is used to facilitate comparisons with laboratory and numerical simulations and to give the results generality. Near-surface χ/Q from lidar-detected oil fog are generally in excellent agreement with nearby samples of coreleased SF6, considering the large spatial gradients found in the oil fog. Extrapolations to the surface of ∫χdy/Q of radar-detected “chaff” agree reasonably well with most oil fog values after a mathematical compensation for the chaff's settling speed. Measured wind direction distributions compare favorably with ∫χdy and ∫χdz distributions of both tracers. The directly measured bulk variables σy, and σz, show little effect of source height or of tracer type except that surface-released σy are enhanced by up to 60% at X<0.3 [X =(x/U)w*/zi, where U is mean wind speed, w* is the convective scale vel...Keywords
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