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| Titel |
The "dual-spot" Aethalometer: an improved measurement of aerosol black carbon with real-time loading compensation |
| VerfasserIn |
L. Drinovec, G. Mocnik, P. Zotter, A. S. H. Prévôt, C. Ruckstuhl, E. Coz, M. Rupakheti, J. Sciare, T. Müller, A. Wiedensohler, A. D. A. Hansen |
| 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. 5 ; Nr. 8, no. 5 (2015-05-06), S.1965-1979 |
| Datensatznummer |
250116355
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| Publikation (Nr.) |
 copernicus.org/amt-8-1965-2015.pdf |
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| Zusammenfassung |
| Aerosol black carbon is a unique primary tracer for combustion emissions. It
affects the optical properties of the atmosphere and is recognized as the
second most important anthropogenic forcing agent for climate change. It is
the primary tracer for adverse health effects caused by air pollution. For
the accurate determination of mass equivalent black carbon concentrations in
the air and for source apportionment of the concentrations, optical
measurements by filter-based absorption photometers must take into account
the "filter loading effect". We present a new real-time loading effect
compensation algorithm based on a two parallel spot measurement of optical
absorption. This algorithm has been incorporated into the new Aethalometer
model AE33. Intercomparison studies show excellent reproducibility of the
AE33 measurements and very good agreement with post-processed data obtained
using earlier Aethalometer models and other filter-based absorption
photometers. The real-time loading effect compensation algorithm provides
the high-quality data necessary for real-time source apportionment and for
determination of the temporal variation of the compensation parameter k. |
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