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Proceedings Paper

Retrieval of physical properties of particulate emission from animal feeding operations using three-wavelength elastic lidar measurements
Author(s): Vladimir V. Zavyalov; Christian Marchant; Gail E. Bingham; Thomas D. Wilkerson; Jason Swasey; Christopher Rogers; Douglas Ahlstrom; Paul Timothy
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Paper Abstract

Agricultural operations produce a variety of particulates and gases that influence ambient air quality. Lidar (LIght Detection And Ranging) technology provides a means to derive quantitative information of particulate spatial distribution and optical/physical properties over remote distances. A three-wavelength scanning lidar system built at the Space Dynamic Laboratory (SDL) is used to extract optical parameters of particulate matter and to convert these optical properties to physical parameters of particles. This particulate emission includes background aerosols, emissions from the agricultural feeding operations, and fugitive dust from the road. Aerosol optical parameters are retrieved using the widely accepted solution proposed by Klett. The inversion algorithm takes advantage of measurements taken simultaneously at three lidar wavelengths (355, 532, and 1064 nm) and allows us to estimate the particle size distribution. A bimodal lognormal particle size distribution is assumed and mode radius, width of the distribution, and total number density are estimated, minimizing the difference between calculated and measured extinction coefficients at the three lidar wavelengths. The results of these retrievals are then compared with simultaneous point measurements at the feeding operation site, taken with standard equipment including optical particle counters, portable PM10 and PM2.5 ambient air samplers, multistage impactors, and an aerosol mass spectrometer.

Paper Details

Date Published: 1 September 2006
PDF: 11 pages
Proc. SPIE 6299, Remote Sensing of Aerosol and Chemical Gases, Model Simulation/Assimilation, and Applications to Air Quality, 62990S (1 September 2006); doi: 10.1117/12.680967
Show Author Affiliations
Vladimir V. Zavyalov, Space Dynamics Lab. (United States)
Christian Marchant, Space Dynamics Lab. (United States)
Gail E. Bingham, Space Dynamics Lab. (United States)
Thomas D. Wilkerson, Space Dynamics Lab. (United States)
Jason Swasey, Space Dynamics Lab. (United States)
Christopher Rogers, Space Dynamics Lab. (United States)
Douglas Ahlstrom, Space Dynamics Lab. (United States)
Paul Timothy, Space Dynamics Lab. (United States)

Published in SPIE Proceedings Vol. 6299:
Remote Sensing of Aerosol and Chemical Gases, Model Simulation/Assimilation, and Applications to Air Quality
Allen Chu; James Szykman; Shobha Kondragunta, Editor(s)

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