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| Titel |
Minimizing light absorption measurement artifacts of the Aethalometer: evaluation of five correction algorithms |
| VerfasserIn |
M. Collaud Coen, E. Weingärtner, A. Apituley, D. Ceburnis, R. Fierz-Schmidhauser, H. Flentje, J. S. Henzing, S. G. Jennings, M. Moerman, A. Petzold, O. Schmid, U. Baltensperger |
| 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 ; 3, no. 2 ; Nr. 3, no. 2 (2010-04-13), S.457-474 |
| Datensatznummer |
250000976
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| Publikation (Nr.) |
 copernicus.org/amt-3-457-2010.pdf |
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| Zusammenfassung |
| The aerosol light absorption coefficient is an essential parameter involved
in atmospheric radiation budget calculations. The Aethalometer (AE) has the
great advantage of measuring the aerosol light absorption coefficient at
several wavelengths, but the derived absorption coefficients are
systematically too high when compared to reference methods. Up to now, four
different correction algorithms of the AE absorption coefficients have been
proposed by several authors. A new correction scheme based on these
previously published methods has been developed, which accounts for the
optical properties of the aerosol particles embedded in the filter. All the
corrections have been tested on six datasets representing different aerosol
types and loadings and include multi-wavelength AE and white-light AE. All
the corrections have also been evaluated through comparison with a
Multi-Angle Absorption Photometer (MAAP) for four datasets lasting between 6
months and five years. The modification of the wavelength dependence by the
different corrections is analyzed in detail. The performances and the limits
of all AE corrections are determined and recommendations are given. |
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