VOLATILE ORGANIC COMPOUNDS

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Title: VOLATILE ORGANIC COMPOUNDS SOURCES IN PARIS IN SPRING 2007 PART II: ... "biogenic and fuel evaporation" (5%), and "wood burning" (2%).
Elsevier Editorial System(tm) for Atmospheric Environment Manuscript Draft Manuscript Number: Title: VOLATILE ORGANIC COMPOUNDS SOURCES IN PARIS IN SPRING 2007 PART II: SOURCE APPORTIONMENT USING POSITIVE MATRIX FACTORIZATION Article Type: Research Paper Keywords: VOC; PMF; emission inventory, urban area, Ile de France Corresponding Author: Dr. Valerie Gros, Corresponding Author's Institution: CNRS First Author: Cecile Gaimoz Order of Authors: Cecile Gaimoz; Stephane Sauvage; Valerie Gros; Frank Herrmann; Jonathan Williams; Nadine Locoge; Olivier Perrussel; Bernard Bonsang; Odile d'Argouges; Roland Sarda-Esteve; jean Sciare Abstract: Volatile Organic Compounds (VOC) measurements were performed during an intensive campaign in Paris (May-June 2007). A qualitative assessment of this dataset including diel variations and dependence on air mass origin has been presented in Part I of this study (Gros et al., this issue). In this study (Part II), a Positive Matrix Factorization (PMF) model has been used for the determination of VOC source contributions in Paris during this campaign. Known literature profiles and time series analyses of the source strengths, along with independent measurements (CO, NOX, aerosols) have been used to identify the seven distinct profiles extracted from the model. According to the PMF analysis, the major sources of VOC during the campaign were traffic related emissions (vehicle exhaust, 22% and fuel evaporation, 17%), the remaining emissions being from "remote industrial sources" (35%), "natural gas and background" (13%), "local sources" (7%), "biogenic and fuel evaporation" (5%), and "wood burning" (2%). It was noted that the "remote industrial" contribution was highly dependant on the air mass origin. This campaign was influenced by two distinct air mass origin regimes: westerly advected air masses from the Atlantic (only local/regional pollution was observed) and easterly advected continental air masses (additional continental pollution was observed). During the period of oceanic air masses, the source identified as "remote industrial" had a relatively low contribution (