Measurement and Analysis of Puff Dispersion above the Atmospheric Boundary Layer Using Quantitative Imagery

Autor:	H. L. Lundblad, I. A. Min, R. N. Abernathy
Rok vydání:	2002
Předmět:	Atmospheric Science Meteorology Infrared Turbulence Planetary boundary layer Standard deviation Sulfur hexafluoride Atmosphere chemistry.chemical_compound chemistry Environmental science Statistical dispersion Remote sensing Crosswind
Zdroj:	Journal of Applied Meteorology. 41:1027-1041
ISSN:	1520-0450 0894-8763
DOI:	10.1175/1520-0450(2002)041<1027:maaopd>2.0.co;2
Popis:	Collection and analysis of puff dispersion data in the atmosphere using a remote sensing technique are presented. Quantitative measurements of standard deviation of the concentration distribution in the along-wind and crosswind direction have been generated via observations of sulfur hexafluoride (SF6) puffs released from an elevated blimp (850 m above mean sea level) and simultaneous imaging from multiple infrared cameras. The imagery data were collected as part of the Model Validation Program experiments at Vandenberg Air Force Base, California, during 21–23 May 1997. Some detailed quantitative imagery of the evolution of the puffs is shown. The puff imagery data were used to derive time histories for the along-wind and crosswind material distribution standard deviations (σ). Although there is considerable variation, it is found that a linear growth rate of σ gives a reasonable fit to the data. The material σ values are then used to estimate the turbulence intensities. Apart from the enhanced c...
Databáze:	OpenAIRE
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