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Coen, M.C.* ; Weingartner, E.* ; Apituley, A.* ; Ceburnis, D.* ; Fierz-Schmidhauser, R.* ; Flentje, H.* ; Henzing, J.S.* ; Jennings, S.G.* ; Moerman, M.* ; Petzold, A.* ; Schmid, O. ; Baltensperger, U.*

Minimizing light absorption measurement artifacts of the Aethalometer: Evaluation of five correction algorithms.

Atmos. Meas. Tech. 3, 457-474 (2010)
Verlagsversion Volltext
Open Access Gold
Creative Commons Lizenzvertrag
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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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter ALPINE SITE JUNGFRAUJOCH; ATTENUATION CROSS-SECTION; BLACK CARBON; EXTINCTION CELL; SOOT PARTICLES; REAL-TIME; M ASL; AEROSOL; FILTER; NEPHELOMETER
ISSN (print) / ISBN 1867-1381
e-ISSN 1867-8548
Quellenangaben Band: 3, Heft: 2, Seiten: 457-474 Artikelnummer: , Supplement: ,
Verlag European Geosciences Union (EGU) ; Copernicus
Begutachtungsstatus Peer reviewed