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| Titel |
Photoacoustic and nephelometric spectroscopy of aerosol optical properties with a supercontinuum light source |
| VerfasserIn |
N. Sharma, I. J. Arnold, H. Moosmüller, W. P. Arnott, C. Mazzoleni |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 6, no. 12 ; Nr. 6, no. 12 (2013-12-10), S.3501-3513 |
| Datensatznummer |
250085133
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| Publikation (Nr.) |
 copernicus.org/amt-6-3501-2013.pdf |
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| Zusammenfassung |
A novel multi-wavelength photoacoustic-nephelometer 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. |
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