Rocky Mountain Research Station Publications

RMRS Online Publication - Journal Articles, External Publications, and Special Reports
Optical closure experiments for biomass smoke aerosols

Mack, L. A.; Levin, E. J. T.; Kreidenweis, S. M.; Obrist, D.; Moosmuller, H.; Lewis, K. A.; Arnott, W. P.; McMeeking, G. R.; Sullivan, A. P.; Wold, C. E.; Hao, W.-M.; Collett, J. L., Jr.; Malm, W. C. 2010. Optical closure experiments for biomass smoke aerosols. Atmospheric Chemistry and Physics. 10: 9017-9026.

A series of laboratory experiments at the Fire Laboratory at Missoula (FLAME) investigated chemical, physical, and optical properties of fresh smoke samples from combustion of wildland fuels that are burned annually in the western and southeastern US The burns were conducted in the combustion chamber of the US Forest Service Fire Sciences Laboratory in Missoula, Montana. Here we discuss retrieval of optical properties for a variety of fuels burned in FLAME 2, using nephelometer-measured scattering coefficients, photoacoustically-measured aerosol absorption coefficients, and size distribution measurements. Uncertainties are estimated from various instrument characteristics and instrument calibration studies. Our estimates of single scattering albedo for different dry smoke samples varied from 0.428 to 0.990, indicative of observed wide variations in smoke aerosol chemical composition. In selected case studies, we retrieved the complex refractive index from measurements but show that these are highly sensitive to uncertainties in measured size distributions.

Keywords: biomass smoke aerosols, Fire Laboratory at Missoula (FLAME), smoke, wildland fuels

About PDFs: For best results, do not open the PDF in your Web browser. Right-click on the PDF link to download the PDF file directly to your computer. Click here for more PDF help.

Download Article

PDF File Size: 640 K

Title: RMRS Other Publications: Optical closure experiments for biomass smoke aerosols
Electronic Publish Date: February 23, 2012
Last Update:
February 23, 2012

RMRS Publications | Order a publication | Contact Us