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| Titel |
Mass-specific optical absorption coefficients and imaginary part of the complex refractive indices of mineral dust components measured by a multi-wavelength photoacoustic spectrometer |
| VerfasserIn |
N. Utry, T. Ajtai, M. Pintér, E. Tombácz, E. Illés, Z. Bozóki, G. Szabó |
| 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 ; 8, no. 1 ; Nr. 8, no. 1 (2015-01-22), S.401-410 |
| Datensatznummer |
250116062
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| Publikation (Nr.) |
 copernicus.org/amt-8-401-2015.pdf |
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| Zusammenfassung |
| Mass-specific optical absorption coefficients (MACs) and the imaginary part
(κ) of the refractive indices of various mineral dust components
including silicate clays (illite, kaolin and bentonite), oxides (quartz,
hematite and rutile), and carbonate (limestone) were determined at the
wavelengths of 1064, 532, 355 and 266 nm. The MAC values were calculated
from aerosol optical absorption coefficients measured by a multi-wavelength
photoacoustic (PA) instrument, the mass concentration and the number size
distribution of the generated aerosol samples as well as the size transfer
functions of the measuring instruments. Values of κ were calculated
from the measured and particle-loss-corrected data by using a Mie-theory-based retrieval algorithm. The determined values could be used for
comparisons with calculated wavelength-dependent κ values typically
deduced from bulk-phase measurements by using indirect measurement methods.
Accordingly, the presented comparison of the measured and calculated aerosol
optical absorption spectra revealed the strong need for standardized sample
preparation and measurement methodology in case of bulk-phase measurements. |
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