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| Titel |
SoFi, an IGOR-based interface for the efficient use of the generalized multilinear engine (ME-2) for the source apportionment: ME-2 application to aerosol mass spectrometer data |
| VerfasserIn |
F. Canonaco, M. Crippa, J. G. Slowik, U. Baltensperger, A. S. H. Prévôt |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 6, no. 12 ; Nr. 6, no. 12 (2013-12-23), S.3649-3661 |
| Datensatznummer |
250085142
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| Publikation (Nr.) |
 copernicus.org/amt-6-3649-2013.pdf |
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| Zusammenfassung |
| Source apportionment using the bilinear model through a multilinear engine
(ME-2) was successfully applied to non-refractory organic aerosol (OA) mass
spectra collected during the winter of 2011 and 2012 in Zurich, Switzerland
using the aerosol chemical speciation monitor (ACSM). Five factors were
identified: low-volatility oxygenated OA (LV-OOA), semivolatile oxygenated OA
(SV-OOA), hydrocarbon-like OA (HOA), cooking OA (COA) and biomass burning OA
(BBOA). A graphical user interface SoFi (Source Finder) was developed at PSI
in order to facilitate the testing of different rotational techniques
available within the ME-2 engine by providing a priori factor profiles for
some or all of the expected factors. ME-2 was used to test the positive
matrix factorization (PMF) model, the fully constrained chemical mass balance
(CMB) model, and partially constrained models utilizing a values and
pulling equations. Within the set of model solutions determined to be
environmentally reasonable, BBOA and SV-OOA factor mass spectra and time
series showed the greatest variability. This variability represents the
uncertainty in the model solution and indicates that analysis of model
rotations provides a useful approach for assessing the uncertainty of
bilinear source apportionment models. |
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