AAAR 33rd Annual Conference
October 20 - October 24, 2014
Rosen Shingle Creek
Orlando, Florida, USA
Abstract View
Black and Elemental Carbon in Two European Urban Areas – Temporal Trends, Site and Seasonal Similarities and Differences
Regina Hitzenberger, Jaroslav Schwarz, Isabella Aschauer, Richard Haindl, Wolfgang Ludwig, Robert Wagner, ANNA WONASCHUETZ, Gudrun Zecha, Petr Vodicka, Zdenek Wagner, Nadezda Zikova, Vladimir Zdimal, University of Vienna
Abstract Number: 203 Working Group: Carbonaceous Aerosols in the Atmosphere
Abstract Techniques for BC and EC analysis are compared in Prague (Czech Republic) and Vienna (Austria). In earlier studies (Vienna) seasonally different method conversion coefficients were obtained. Here we investigate conversion factors for the two cities and whether previous Vienna factors are still applicable under the changed source conditions.
Two back-to-back campaigns were performed in Prague and Vienna in summer 2012 and winter 2013 using several techniques (all sites: microaethalometer, MAAP, Sunset Laboratory instrument with NIOSH and EUSAAR II, integrating sphere for BC and brown carbon, BrC; Prague only: Sunset field instrument, multiwavelength Aethalometer). Number and mass size distributions of major ions, BC and BrC were also obtained.
Methods are well comparable at both sites regarding campaign averages. The BC content of the Vienna aerosol was 8% in summer and 3% in Winter, (values for Prague: 5% and 8%). Campaign averages were 0.9 µg/m³ (Vienna) and 0.7 µg/m³ (Prague) in summer and 2.8 µg/m³ and 1.9 µg/m³ in winter. BrC (biomass smoke) was found at both sites in winter, but only in Prague in summer. Some differences in conversion factors were found for the new and previous intercomparisons in Vienna.
Acknowledgements: ÖAD, WTZ grant CZ 03/2012; MEYS MOBILITY grant 7AMB12AT021, Czech Science Foundation, grant P209/11/1342.