J. D. Allan, A generalised method for the extraction of chemically resolved mass spectra from Aerodyne aerosol mass spectrometer data, Journal of Aerosol Science, vol.35, issue.7, pp.909-922, 2004.
DOI : 10.1016/j.jaerosci.2004.02.007

A. T. Archibald, Impacts of HOx regeneration and recycling in the oxidation of isoprene: Consequences for the composition of past, present and future atmospheres, Geophys. Res. Lett, vol.38, issue.5, pp.10-1029, 2011.

K. H. Bates, J. D. Crounse, J. M. St, N. B. Clair, T. B. Bennett et al., J. H. Seinfeld, B. M

P. O. Stoltz and . Wennberg, Gas Phase Production and Loss of Isoprene Epoxydiols, The Journal of Physical Chemistry A, vol.118, issue.7, pp.1237-124610, 2014.

S. H. Budisulistiorini, Real-Time Continuous Characterization of Secondary Organic Aerosol Derived from Isoprene Epoxydiols in Downtown Atlanta, Georgia, Using the Aerodyne Aerosol Chemical Speciation Monitor, Environmental Science & Technology, vol.47, issue.11, pp.5686-569410, 2013.
DOI : 10.1021/es400023n

S. H. Budisulistiorini, Examining the effects of anthropogenic emissions on isoprene-derived secondary organic aerosol formation during the 2013 Southern Oxidant and Aerosol Study (SOAS) at the Look Rock, Tennessee ground site, 2015.

. Phys, , pp.8871-8888

M. R. Canagaratna, 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

F. Canonaco, M. Crippa, J. G. Slowik, U. Baltensperger, and A. S. Prévôt, 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, Atmospheric Measurement Techniques, vol.6, issue.12, pp.3649-366110, 2013.
DOI : 10.5194/amt-6-3649-2013-supplement

Q. Chen, Submicron particle mass concentrations and sources in the Amazonian wet season (AMAZE-08), Atmospheric Chemistry and Physics, vol.15, issue.7, pp.3687-370110, 2015.
DOI : 10.5194/acp-15-3687-2015-supplement

S. S. De-sá, Influence of urban pollution on the production of organic particulate matter from isoprene epoxydiols in central Amazonia, Atmos. Chem. Phys. Discuss, vol.20165194, pp.1-5810, 2016.

X. Ding, Q. He, R. Shen, Q. Yu, and Y. Zhang,

. Wang, Spatial and seasonal variations of isoprene secondary organic aerosol in China: Significant impact of biomass burning during winter, Sci. Rep, vol.6, 2016.

R. R. Draxler and G. D. Rolph, HYSPLIT (HYbrid Single-Particle Lagrangian Integrated Trajectory) Model Access via NOAA ARL READY Website, 2003.

N. C. Eddingsaas, D. G. Vandervelde, and P. O. Wennberg, Kinetics and Products of the Acid-Catalyzed Ring-Opening of Atmospherically Relevant Butyl Epoxy Alcohols, The Journal of Physical Chemistry A, vol.114, issue.31, pp.8106-811310, 1021.
DOI : 10.1021/jp103907c

C. Fountoukis and A. Nenes, ISORROPIA II: a computationally efficient thermodynamic equilibrium model for K+-Ca2+ -Mg2+-NH4+ -Na+ -SO42--NO3-- Cl- - H2O aerosols, Atmos. Chem. Phys, vol.75194, issue.17, pp.4639-465910, 2007.
URL : https://hal.archives-ouvertes.fr/hal-00302572

C. J. Gaston, T. P. Riedel, Z. Zhang, A. Gold, J. D. Surratt et al., Reactive Uptake of an Isoprene-Derived Epoxydiol to Submicron Aerosol Particles, Environmental Science & Technology, vol.48, issue.19, pp.11178-1118610, 2014.
DOI : 10.1021/es5034266

F. Geng, X. Tie, A. Guenther, G. Li, J. Cao et al., Effect of isoprene emissions from major forests on ozone formation in the city of, 2011.

, Chem. Phys, vol.115194, issue.2010, pp.10449-10459

A. B. Guenther, X. Jiang, C. L. Heald, T. Sakulyanontvittaya, T. Duhl et al.,

. Wang, The Model of Emissions of Gases and Aerosols from Nature version 2, 2012.

, 1): an extended and updated framework for modeling biogenic emissions, Geosci. Model Dev, vol.5, issue.6, pp.1471-149210

S. Guo, Elucidating severe urban haze formation in China, Proc. Natl. Acad, 2014.
DOI : 10.1029/2010JD014566

. U. Sci, , pp.17373-17378

R. Henry, G. A. Norris, R. Vedantham, and J. R. Turner, Source Region Identification Using Kernel Smoothing, Source Region Identification Using Kernel Smoothing, pp.4090-409710, 2009.
DOI : 10.1021/es8011723

W. W. Hu, Characterization of a real-time tracer for isoprene epoxydiols-derived secondary organic aerosol (IEPOX-SOA) from aerosol mass spectrometer measurements, Atmos. Chem. Phys, vol.155194, issue.20, pp.11807-1183310, 2015.
URL : https://hal.archives-ouvertes.fr/hal-01836107

R. J. Huang, High secondary aerosol contribution to particulate pollution during haze events in China, Nature, vol.118, issue.7521, pp.514-218, 1038.
DOI : 10.1016/j.atmosres.2013.01.011

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

F. Paulot, J. D. Crounse, H. G. Kjaergaard, A. Kürten, J. M. St et al.,

, Unexpected Epoxide Formation in the Gas-Phase Photooxidation of Isoprene, Wennberg Science, issue.5941, pp.325-730, 2009.

J. E. Petit, O. Favez, A. Albinet, and F. Canonaco, A user-friendly tool for comprehensive evaluation of the geographical origins of atmospheric pollution: Wind and trajectory analyses, Environmental Modelling & Software, tmospheric erosol over Vermont, pp.183-187, 2001.

, Chemical Composition and Sources, pp.4604-4621

W. Rattanavaraha, Assessing the impact of anthropogenic pollution on isoprene-derived secondary organic aerosol formation in PM2.5 collected from the Birmingham, Alabama, ground site during the 2013 Southern Oxidant and Aerosol Study, Atmos. Chem. Phys, vol.165194, issue.8, pp.4897-491410, 2016.

T. P. Riedel, Y. Lin, S. H. Budisulistiorini, C. J. Gaston, and J. A. ,

A. Vizuete, J. D. Gold, and . Surratt, Heterogeneous Reactions of Isoprene-Derived Epoxides: Reaction Probabilities and Molar Secondary Organic Aerosol Yield Estimates, Environ. Sci. Technol. Lett, vol.2, issue.2, pp.38-4210, 2015.

M. Riva, S. H. Budisulistiorini, Z. Zhang, A. Gold, and J. D. Surratt, Chemical characterization of secondary organic aerosol constituents from isoprene ozonolysis in the presence of acidic aerosol, Atmospheric Environment, vol.130, pp.5-13, 2016.
DOI : 10.1016/j.atmosenv.2015.06.027

. St, J. M. Clair, J. C. Rivera-rios, J. D. Crounse, E. Praske et al., Investigation of a potential HCHO measurement artifact from ISOPOOH, Atmos. Meas. Tech, vol.9, issue.9, pp.4561-456810, 2016.

Y. Sun, Q. Jiang, Z. Wang, P. Fu, J. Li et al., Investigation of the sources and evolution processes of severe haze pollution in Beijing, J, 2013.

, Geophys. Res. Atmos, vol.119, issue.7, pp.4380-4398

Y. Sun, Z. Wang, H. Dong, T. Yang, J. Li et al., Characterization of summer organic and inorganic aerosols in Beijing, China with an Aerosol Chemical Speciation Monitor, Atmospheric Environment, vol.51, pp.250-259, 2012.
DOI : 10.1016/j.atmosenv.2012.01.013

J. D. Surratt, A. W. Chan, N. C. Eddingsaas, M. Chan, C. L. Loza et al.,

R. C. Hersey, P. O. Flagan, J. H. Wennberg, and . Seinfeld, Reactive intermediates revealed in secondary organic aerosol formation from isoprene, Proc. Natl. Acad. Sci, 2010.

U. S. , , pp.6640-6645

J. D. Surratt, Chemical Composition of Secondary Organic Aerosol Formed from the Photooxidation of Isoprene, The Journal of Physical Chemistry A, vol.110, issue.31, pp.9665-969010, 2006.
DOI : 10.1021/jp061734m

E. Von-schneidemesser, P. S. Monks, V. Gros, J. Gauduin, and O. Sanchez, How important is biogenic isoprene in an urban environment? A study in London and Paris, Geophysical Research Letters, vol.42, issue.24, pp.10-1029, 2011.
DOI : 10.1016/j.atmosenv.2008.03.035

J. Wang, T. B. Onasch, X. Ge, S. Collier, Q. Zhang et al., Observation of Fullerene Soot in Eastern China, 2016.

. Sci, . Technol, and . Lett, , pp.121-126

F. Xiong, Observation of isoprene hydroxynitrates in the southeastern United States and implications for the fate of NO_<i>x</i>, Atmospheric Chemistry and Physics, vol.15, issue.19, pp.11257-1127210, 2015.
DOI : 10.5194/acp-15-11257-2015-supplement

L. Xu, Effects of anthropogenic emissions on aerosol formation from isoprene and monoterpenes in the southeastern United States, Proceedings of the National Academy of Sciences, vol.6, issue.11, pp.37-42, 2015.
DOI : 10.5194/acp-14-11893-2014

L. Xu, Enhanced formation of isoprene-derived organic aerosol in sulfur-rich power plant plumes during Southeast Nexus, Journal of Geophysical Research: Atmospheres, vol.112, issue.1, pp.137-11110, 2016.
DOI : 10.1073/pnas.1417609112

L. Xu, S. Suresh, H. Guo, R. J. Weber, and N. L. Ng, Aerosol characterization over the southeastern United States using high resolution aerosol mass spectrometry: spatial and seasonal variation of aerosol composition, sources, and organic nitrates, Atmospheric Chemistry and Physics Discussions, vol.15, issue.7, pp.7307-733610, 2015.
DOI : 10.5194/acpd-15-10479-2015-supplement

Y. Zhang, Chemical composition, sources and evolution processes of aerosol at an urban site in Yangtze River Delta, China during wintertime, Atmospheric Environment, vol.123, pp.339-349, 2015.
DOI : 10.1016/j.atmosenv.2015.08.017

Y. J. Zhang, Insights into characteristics, sources, and evolution of submicron aerosols during harvest seasons in the Yangtze River delta region, 2015.

. Phys, , pp.1331-1349

, direction (WD) (b) relative humidity (RH) and ambient temperature (T); (c) O x (= O 3 + NO 2 ), NO 2 , and SO 2 ; and (d) mass concentrations of IEPOX-SOA, sulfate (SO 4 ), isoprene, and methyl vinyl ketone and methacrolein (MVK+MACR). The air masses during the study period were also classified into four clusters as shown in Figure S2. The missing data of isoprene and MVK+MACR on the Fig, Figure 1. Time series of