A. C. Aiken, P. F. Decarlo, and J. L. Jimenez, Elemental Analysis of Organic Species with Electron Ionization High-Resolution Mass Spectrometry, Analytical Chemistry, vol.79, issue.21, pp.8350-8358, 2007.
DOI : 10.1021/ac071150w

A. C. Aiken, P. F. Decarlo, J. H. Kroll, J. A. Huffman, K. S. Docherty et al., O/C and OM/OC Ratios of Primary, Secondary, and Ambient Organic Aerosols with High-Resolution Time-of-Flight Aerosol Mass Spectrometry, Environmental Science & Technology, vol.42, issue.12, pp.4478-4485, 2008.
DOI : 10.1021/es703009q

H. Akimoto, Global Air Quality and Pollution, Science, vol.302, issue.5651, pp.1716-1719, 2003.
DOI : 10.1126/science.1092666

N. Bukowiecki, J. Dommen, A. S. Prévôt, R. Richter, E. Weingartner et al., A mobile pollutant measurement laboratory???measuring gas phase and aerosol ambient concentrations with high spatial and temporal resolution, Atmospheric Environment, vol.36, issue.36-37, pp.5569-5579, 2002.
DOI : 10.1016/S1352-2310(02)00694-5

M. R. Canagaratna, J. T. Jayne, J. L. Jimenez, J. D. Allan, M. R. Alfarra et al., Chemical and microphysical characterization of ambient aerosols with the aerodyne aerosol mass spectrometer, Mass Spectrometry Reviews, vol.5, issue.187, pp.185-222, 2007.
DOI : 10.1080/10473289.2002.10470813

M. Crippa, P. F. Decarlo, J. G. Slowik, C. Mohr, M. F. Heringa et al., Wintertime aerosol chemical composition and source apportionment of the organic fraction in the metropolitan area of Paris, Atmos. Chem. Phys, vol.135194, pp.961-98110, 2013.
URL : https://hal.archives-ouvertes.fr/hal-01662669

P. J. Crutzen, New Directions: The growing urban heat and pollution ?island? effect?impact on chemistry and climate*1, Atmospheric Environment, vol.38, issue.21, pp.3539-3540, 2004.
DOI : 10.1016/j.atmosenv.2004.03.032

P. F. Decarlo, J. R. Kimmel, A. Trimborn, M. J. Northway, J. T. Jayne et al., Field-Deployable, High-Resolution, Time-of-Flight Aerosol Mass Spectrometer, Analytical Chemistry, vol.78, issue.24, pp.8281-8289, 2006.
DOI : 10.1021/ac061249n

F. Drewnick, S. S. Hings, M. R. Alfarra, A. S. Prevot, and S. Borrmann, Aerosol quantification with the Aerodyne Aerosol Mass Spectrometer: detection limits and ionizer background effects, Atmos. Meas. Tech, vol.25194, issue.2, pp.33-4610, 2009.

F. Drewnick, T. Böttger, S. Von-der-weiden-reinmüller, S. R. Zorn, T. Klimach et al., Design of a mobile aerosol research laboratory and data processing tools for effective stationary and mobile field measurements, Atmos . Meas. Tech, vol.55194, pp.1443-145710, 1443.

N. F. Elanskii, I. B. Belikov, G. S. Golitsyn, A. M. Grisenko, O. V. Lavrova et al., Observations of the atmosphere composition in the Moscow megapolis from a mobile laboratory, Doklady Earth Sciences, vol.42, issue.1, pp.649-655, 2010.
DOI : 10.1134/S1028334X10050211

J. Fenger, Urban air quality, Atmospheric Environment, vol.33, issue.29, pp.4877-4900, 1999.
DOI : 10.1016/S1352-2310(99)00290-3

F. Freutel, J. Schneider, F. Drewnick, S. Von-der-weiden-reinmüller, M. Crippa et al., Aerosol particle measurements at three stationary sites in the megacity of Paris during summer 2009: meteorology and air mass origin dominate aerosol particle composition and size distribution, Atmos. Chem. Phys, vol.135194, pp.933-95910, 2013.
URL : https://hal.archives-ouvertes.fr/hal-01089505

V. Gros, J. Sciare, Y. , and T. , Air-quality measurements in megacities: Focus on gaseous organic and particulate pollutants and comparison between two contrasted cities, Paris and Beijing, Comptes Rendus Geoscience, vol.339, issue.11-12, pp.764-774, 2007.
DOI : 10.1016/j.crte.2007.08.007

B. R. Gurjar and J. Lelieveld, New Directions: Megacities and global change, Atmospheric Environment, vol.39, issue.2, pp.391-393, 2005.
DOI : 10.1016/j.atmosenv.2004.11.002

R. M. Harrison, J. Yin, R. M. Tilling, X. Cai, P. W. Seakins et al., Measurement and modelling of air pollution and atmospheric chemistry in the U.K. West Midlands conurbation: Overview of the PUMA Consortium project, Measurement and modelling of air pollution and atmospheric chemistry in the U.K. West Midlands conurbation: Overview of the PUMA consortium project, pp.5-25, 2006.
DOI : 10.1016/j.scitotenv.2005.08.053

S. Von-der-weiden-reinmüller, Mobile urban emission investigations Honoré Predictability of European air quality: Assessment of 3 years of operational forecasts and analyses by the PREV'AIR system, J. Geophys. Res, p.10, 1029.

J. T. Jayne, D. C. Leard, X. Zhang, P. Davidovits, K. A. Smith et al., Development of an Aerosol Mass Spectrometer for Size and Composition Analysis of Submicron Particles, Aerosol Science and Technology, vol.33, issue.1-2, pp.49-70, 2000.
DOI : 10.1080/027868200410840

J. L. Jimenez, M. R. Canagaratna, N. M. Donahue, A. S. Prévôt, Q. Zhang et al., Evolution of Organic Aerosols in the Atmosphere, and Worsnop, D. R.: Evolution of organic aerosol in the atmosphere, pp.1525-1529, 2009.
DOI : 10.1016/1352-2310(94)90094-9

C. E. Kolb, S. C. Herndon, J. B. Mcmanus, J. H. Shorter, M. S. Zahniser et al., Mobile Laboratory with Rapid Response Instruments for Real-Time Measurements of Urban and Regional Trace Gas and Particulate Distributions and Emission Source Characteristics, Environmental Science & Technology, vol.38, issue.21, pp.5694-5703, 2004.
DOI : 10.1021/es030718p

D. Kunkel, M. G. Lawrence, H. Tost, A. Kerkweg, P. Jöckl et al., Urban emission hot spots as sources for remote aerosol deposition, Geophysical Research Letters, vol.106, issue.D21, pp.10-1029, 2012.
DOI : 10.1029/2000JD000123

V. A. Lanz, M. R. Alfarra, U. Baltensperger, B. Buchmann, C. Hueglin et al., Source apportionment of submicron organic aerosols at an urban site by factor analytical modelling of aerosol mass spectra, Atmospheric Chemistry and Physics, vol.7, issue.6, pp.1503-152210, 1503.
DOI : 10.5194/acp-7-1503-2007
URL : https://hal.archives-ouvertes.fr/hal-00296174

V. A. Lanz, A. S. Prévôt, M. R. Alfarra, S. Weimer, C. Mohr et al., Characterization of aerosol chemical composition with aerosol mass spectrometry in Central Europe: an overview, Atmos. Chem. Phys, vol.105194, pp.10453-1047110, 2010.
URL : https://hal.archives-ouvertes.fr/hal-00552876

B. M. Matthew, A. M. Middlebrook, and T. B. Onasch, Collection Efficiencies in an Aerodyne Aerosol Mass Spectrometer as a Function of Particle Phase for Laboratory Generated Aerosols, Aerosol Science and Technology, vol.34, issue.11, pp.884-898, 2008.
DOI : 10.1080/02786820500380206

P. Mcmurry, A review of atmospheric aerosol measurements, Atmospheric Environment, vol.34, issue.12-14, 1959.
DOI : 10.1016/S1352-2310(99)00455-0

C. Mohr, R. Richter, P. F. Decarlo, A. S. Prévôt, and U. Baltensperger, Spatial variation of chemical composition and sources of submicron aerosol in Zurich during wintertime using mobile aerosol mass spectrometer data, Atmospheric Chemistry and Physics, vol.11, issue.15, pp.7465-748210, 2011.
DOI : 10.5194/acp-11-7465-2011-supplement

C. Mohr, P. F. Decarlo, M. F. Heringa, R. Chirico, J. G. Slowik et al., Identification and quantification of organic aerosol from cooking and other sources in Barcelona using aerosol mass spectrometer data, Atmos. Chem. Phys, vol.125194, pp.1649-166510, 1649.

M. J. Molina and L. T. Molina, Megacities and Atmospheric Pollution, Journal of the Air & Waste Management Association, vol.54, issue.6, pp.644-680, 2004.
DOI : 10.1017/CBO9780511528576

L. J. Nunnermacker, D. Imre, P. H. Daum, L. Kleinman, Y. Lee et al., Characterization of the Nashville urban plume on July 3 and July 18, 1995, Characterization of the Nashville urban plume on, pp.28129-2814810, 1029.
DOI : 10.1029/98JD00074

P. Paatero, Least squares formulation of robust non-negative factor analysis, Chemometrics and Intelligent Laboratory Systems, vol.37, issue.1, pp.23-35, 1997.
DOI : 10.1016/S0169-7439(96)00044-5

P. Paatero and U. Tapper, Positive matrix factorization: A non-negative factor model with optimal utilization of error estimates of data values, Environmetrics, vol.18, issue.2, pp.111-126, 1994.
DOI : 10.1007/978-3-642-93295-3_112

J. Pey, S. Rodriguez, X. Querol, A. Alastuey, T. Moreno et al., Variations of urban aerosols in the western Mediterranean, Atmospheric Environment, vol.42, issue.40, pp.9052-9062, 2008.
DOI : 10.1016/j.atmosenv.2008.09.049

L. Pirjola, H. Parviainen, T. Hussein, A. Valli, K. Hämeri et al., ???Sniffer??????a novel tool for chasing vehicles and measuring traffic pollutants, Atmospheric Environment, vol.38, issue.22, pp.3625-3635, 2004.
DOI : 10.1016/j.atmosenv.2004.03.047

. Prev, Air: available at: http://prevair.org, last access: 15, 2013.

G. B. Raga, T. Castro, and D. Baumgardner, The impact of megacity pollution on local climate and implications for the regional environment: Mexico City, Atmospheric Environment, vol.35, issue.10, pp.1805-1811, 2001.
DOI : 10.1016/S1352-2310(00)00275-2

P. Royer, P. Chazette, K. Sartelet, Q. J. Zhang, M. Beekmann et al., Comparison of lidar-derived PM₁₀ with regional modeling and ground-based observations in the frame of MEGAPOLI experiment, Atmospheric Chemistry and Physics, vol.11, issue.20, pp.10705-1072610, 2011.
DOI : 10.5194/acp-11-10705-2011

P. W. Seakins, D. L. Lansley, A. Hodgson, N. Huntley, and F. Pope, New Directions: Mobile laboratory reveals new issues in urban air quality, Atmospheric Environment, vol.36, issue.7, pp.1247-1248, 2002.
DOI : 10.1016/S1352-2310(01)00584-2

M. Steinbacher, C. Zellweger, B. Schwarzenbach, S. Bugmann, B. Buchmann et al., Nitrogen oxide measurements at rural sites in Switzerland: Bias of conventional measurement techniques, Journal of Geophysical Research, vol.3, issue.D4, pp.1130710-1029, 2007.
DOI : 10.1016/0960-1686(91)90018-3

J. Sun, Q. Zhang, M. R. Canagaratna, Y. Zhang, N. L. Ng et al., Highly time- and size-resolved characterization of submicron aerosol particles in Beijing using an Aerodyne Aerosol Mass Spectrometer, Atmospheric Environment, vol.44, issue.1, pp.131-140, 2010.
DOI : 10.1016/j.atmosenv.2009.03.020

. Tof-ams, Analysis Software Homepage: available at: http://cires.colorado, p.15, 2013.

I. M. Ulbrich, M. R. Canagaratna, Q. Zhang, D. R. Worsnop, and J. L. Jimenez, Interpretation of organic components from Positive Matrix Factorization of aerosol mass spectrometric data United Nations: World Urbanization Prospects: The 2011 Revision, Atmos . Chem. Phys, vol.95194, issue.10, pp.2891-2918, 2009.

S. Von-der-weiden, F. Drewnick, S. Borrmann, S. Reinmüller, F. Drewnick et al., Particle Loss Calculator ? a new software tool for the assessment of the performance of aerosol inlet systems Megacity emission plume characteristics in summer and winter investigated by mobile aerosol and trace gas measurements: The Paris metropolitan area, Atmos. Meas. Tech. Atmos. Chem. Phys. Discuss, vol.25194, issue.10, pp.479-494, 2009.

S. Weimer, C. Mohr, R. Richter, J. Keller, M. Mohr et al., Mobile measurements of aerosol number and volume size distributions in an Alpine valley: Influence of traffic versus wood burning, Atmospheric Environment, vol.43, issue.3, pp.624-630, 2009.
DOI : 10.1016/j.atmosenv.2008.10.034

Q. Zhang, D. R. Worsnop, M. R. Canagaratna, and J. L. Jimenez, Hydrocarbon-like and oxygenated organic aerosols in Pittsburgh: insights into sources and processes of organic aerosols, Atmos. Chem. Phys, vol.55194, pp.3289-331110, 2005.
URL : https://hal.archives-ouvertes.fr/hal-00295800

Q. Zhang, J. L. Jimenez, M. R. Canagaratna, I. M. Ulbrich, N. L. Ng et al., Understanding atmospheric organic aerosols via factor analysis of aerosol mass spectrometry: a review, Analytical and Bioanalytical Chemistry, vol.37, issue.6, pp.3045-3067, 2011.
DOI : 10.1029/2010GL043337