The "dual-spot" Aethalometer: an improved measurement of aerosol black carbon with real-time loading compensation

Atmospheric Measurement Techniques - Tập 8 Số 5 - Trang 1965-1979
Luka Drinovec1, Griša Močnik1, Peter Zotter2,3, Andrê S. H. Prévôt2, Christian Ruckstuhl4, Esther Coz5, Maheswar Rupakheti6, Jean Sciare7, Thomas Müller8, Alfred Wiedensohler8, A. D. A. Hansen1
1Aerosol d.o.o, 1000, Ljubljana, Slovenia
2Paul Scherrer Institute, 5232 Villigen, Switzerland
3now at: Lucerne School of Engineering and Architecture, Bioenergy Research, Lucerne University of Applied Sciences and Arts, Horw 6048, Switzerland
4inNET Monitoring AG, 6460 Altdorf, Switzerland
5Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, 28040 Madrid, Spain
6Institute for Advanced Sustainability Studies, 14467 Potsdam, Germany
7Laboratoire du Climat et de l'Environnement, CEA/Orme des Merisiers, 91191 Gif-sur-Yvette, France
8Leibniz Institute for Tropospheric Research, 04318 Leipzig, Germany

Tóm tắt

Abstract. 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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Tài liệu tham khảo

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Atmospheric Measurement Techniques

Tập 8 Số 5

1965-1979

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