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

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.

Schlagwörter

Fachgebiet (DDC)

550 - Geowissenschaften

Projekt

Veranstaltung

Startdatum der Ausstellung

Enddatum der Ausstellung

Startdatum der Konferenz

Enddatum der Konferenz

Datum der letzten Prüfung

ISBN

ISSN

1867-8548
1867-1381

Sprache

Englisch

Während FHNW Zugehörigkeit erstellt

Nein

Zukunftsfelder FHNW

Publikationsstatus

Veröffentlicht

Begutachtung

Peer-Review der ganzen Publikation

Open Access-Status

Gold

Lizenz

Zitation

COLLAUD COEN, Martine, Ernest WEINGARTNER, Arnaud APITULEY, Darius CEBURNIS, Rahel FIERZ-SCHMIDHAUSER, Harald FLENTJE, J.S. HENZING, Stephen G. JENNINGS, Marcel MOERMAN, Andreas PETZOLD, Otmar SCHMID und Urs BALTENSPERGER, 2010. Minimizing light absorption measurement artifacts of the Aethalometer. evaluation of five correction algorithms. Atmospheric Measurement Techniques. 13 April 2010. Bd. 3, Nr. 2, S. 457–474. DOI 10.5194/amt-3-457-2010. Verfügbar unter: https://doi.org/10.26041/fhnw-9677

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