Remote aerosol species-identification using IR scattering spectroscopy

Shupeng Niu; C. Russell Philbrick; Hans D. Hallen

doi:10.1117/12.2050689

9 June 2014 Remote aerosol species-identification using IR scattering spectroscopy

Shupeng Niu, C. Russell Philbrick, Hans D. Hallen

Proceedings Volume 9080, Laser Radar Technology and Applications XIX; and Atmospheric Propagation XI; 908010 (2014) https://doi.org/10.1117/12.2050689
Event: SPIE Defense + Security, 2014, Baltimore, MD, United States

Abstract

Identification of atmospheric aerosol species and their chemical composition may help to trace their source and better estimate their impact on climate and environment. Optical scattering of aerosols depends primarily on aerosol chemical composition, size distribution, particle shape and the wavelength used. Extraction of features due to the aerosol complex refractive index from scattering spectroscopy at a single angle of observation allows composition identification via the spectral fingerprint, as shown computationally with Mie calculations of the optical scattering. Size-dependent scattering effects are eliminated by using near-forward scattering, such as in the scattering aureole. The only features of the aerosol aureole scattering spectra that very rapidly with wavelength are associated with the composition, so the aureole can give a reliable identification of aerosol composition.

Citation Download Citation

Shupeng Niu, C. Russell Philbrick, and Hans D. Hallen "Remote aerosol species-identification using IR scattering spectroscopy", Proc. SPIE 9080, Laser Radar Technology and Applications XIX; and Atmospheric Propagation XI, 908010 (9 June 2014); https://doi.org/10.1117/12.2050689

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