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Intercomparison of ME-2 source apportionment results from 15 co-located aerosol mass spectrometers from the ACTRIS-ACSM network

Abstract : 14 mass spectrometers for on-line aerosol particle chemical composition measurements (13 Quadrupole ACSM, 1 ToF-ACSM) from the ACTRIS-ACSM network (http://www.psi.ch/acsm-stations) and one HR-ToF-AMS were gathered at the SIRTA site in Gif-sur-Yvette, approximately 20km southwest of Paris. From 15.11.2013 to 02.12.2013 all 15 instruments measured ambient aerosol in parallel and with the same settings with the aim to improve the understanding of the measurement technique and its related uncertainties This presentation focuses on the intercomparison of widely and successfully used positive matrix factorization (PMF) source apportionment strategies for aerosol mass spectrometer data (Paatero & Tapper, 1994; Lanz et al., 2007) using the new source finder (SoFi, Canonaco et al., 2013) toolkit based on the Multi-linear Engine 2 (ME2) solver. Fig. 1 summarizes the 4-factor source apportion-ment results, generated individually for each dataset of the 15 instruments using optimized a-values for HOA and COA, with anchor mass spectra taken from a previous campaign at the same site (Crippa et al. 2013). The average contributions of the factors to the total organics are: HOA: 14.8±2.3%; COA: 16.0±2.6%; OOA: 39.4±4.9%; BBOA: 31.0±3.5%. These results present an accuracy of the source apportionment factors across the 15 different instruments of about ±20%. Several other parameters like the variability of the individual factor mass spectra or the influence of the employed reference spectra were explored as well.
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https://hal-ineris.archives-ouvertes.fr/ineris-01852364
Contributor : Gestionnaire Civs <>
Submitted on : Wednesday, August 1, 2018 - 2:37:37 PM
Last modification on : Thursday, August 2, 2018 - 1:08:50 AM

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Roman Frohlich, Vincent Crenn, Francesco Canonaco, Jay G. Slowik, Olivier Favez. Intercomparison of ME-2 source apportionment results from 15 co-located aerosol mass spectrometers from the ACTRIS-ACSM network. 4. ACTRIS General Meeting, Jun 2014, Clermont-Ferrand, France. ⟨ineris-01852364⟩

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