Supplemental Information

On the use of the field Sunset semi-continuous analyzer to measure equivalent black carbon concentrationsNaděžda Zíková1,2*, Petr Vodička1, Wolfgang Ludwig3, Regina Hitzenberger3, Jaroslav Schwarz1

1Laboratory of Aerosol Chemistry and Physics, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojová 2/135, Prague, 16502, Czech Republic2Institute for Environmental Studies, Faculty of Science, Charles University in Prague, Benátská 2, Prague, 12801, Czech Republic3Faculty of Physics, University of Vienna, Boltzmanngasse 5, Vienna, 1090, Austria

*Corresponding author: nada.zikova@natur.cuni.cz, tel: +420 221 951 908

Fig. S1 Loading corrected EBCSunset and EBCaeth data according to the correction by Virkkula et al. (2007) compared to EBCMAAP concentrations in winter (left) and summer (right).

Fig. S2 Time series of original EBCMAAP concentrations (uncorrected), and EBC concentration from the two compared instruments corrected for loading according to Virkkula et al. (2007) in winter (top) and summer (bottom).

Fig. S3 Time series of EBCMAAP (uncorrected), and EBCSunset corrected for loading according to Virkkula et al. (2007) either by a k value calculated for each Sunset analyzer filter spot change (EBCSunset) or by a constant k value (EBCSunset_K) in winter (top) and summer (bottom).

Fig. S4 Time series of EBCMAAP concentration (uncorrected), and EBC concentrations from the three compared instruments corrected for loading according to Collaud Coen et al. (2010) in winter (top) and summer (bottom).

LITERATURE

Collaud Coen, M. et al. 2010. “Minimizing Light Absorption Measurement Artifacts of the Aethalometer: Evaluation of Five Correction Algorithms.” Atmospheric Measurement Techniques 3(2):457–74.

Virkkula, A. et al. 2007. “A Simple Procedure for Correcting Loading Effects of Aethalometer Data.” Journal of the Air & Waste Management Association (1995) 57:1214–22.