Document Type
Article
Publication Date
12-10-2013
Department
Atmospheric Sciences; Department of Physics
Abstract
A novel multi-wavelength photoacousticnephelometer spectrometer (SC-PNS) has been developed for the optical characterization of atmospheric aerosol particles. This instrument integrates a white light supercontinuum laser with photoacoustic and nephelometric spectroscopy to measure aerosol absorption and scattering coefficients at five wavelength bands (centered at 417, 475, 542, 607, and 675 nm). These wavelength bands are selected from the continuous spectrum of the laser (ranging from 400-2200 nm) using a set of optical interference filters. Absorption and scattering measurements on laboratory-generated aerosol samples were performed sequentially at each wavelength band. To test the instrument we measured the wavelength dependence of absorption and scattering coefficients of kerosene soot and common salt aerosols. Results were favorably compared to those obtained with a commercial 3-wavelength photoacoustic and nephelometer instrument demonstrating the utility of the SC light source for studies of aerosol optical properties at selected wavelengths. Here, we discuss instrument design, development, calibration, performance and experimental results.
Publication Title
Atmospheric Measurement Techniques
Recommended Citation
Sharma, N.,
Arnold, I.,
Moosmüller, H.,
Arnott, W.,
&
Mazzoleni, C.
(2013).
Photoacoustic and nephelometric spectroscopy of aerosol optical properties with a supercontinuum light source.
Atmospheric Measurement Techniques,
6(12), 3501-3513.
http://doi.org/10.5194/amt-6-3501-2013
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/3180
Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.
Version
Publisher's PDF
Publisher's Statement
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License. Publisher’s version of record: https://doi.org/10.5194/amt-6-3501-2013