The project MEGAPOLI (MEGAcities: Emissions, urban, regional and Global Atmospheric POLlution and climate effects, and Integrated tools for assessment and mitigation) was conducted in and around Paris in 2009 and 2010 and had the following objectives:

 1. to assess impacts of megacities and large air-pollution hot-spots
     on local, regional and global air quality,
 2. to quantify feedbacks among megacity air quality, local and regional
     climate, and global climate change,
 3. to develop improved integrated tools for prediction of air pollution
     in megacities.

Two large field campaigns were carried out:

1) Paris Plume experiment (summer campaign)
The Particle Chemistry Department (MPIC-PC), research groups Schneider & Drewnick, participated in the summer Paris campaign (July 2009) as follows:
- Aircraft-based aerosol cmposition measuremens (ALABAMA on ATR42)
- Mobile ground based aerosol and gas measurements (MoLa)
- Stationary ground based aerosol composition (LoLa = local laboratory)
   (SPLAT, C-ToF-AMS, UV-APS, MAAP, OPC, EAS, CPC, TEOM, Airpointer)
People involved:
ALABAMA: M. Brands, T. Böttger, J. Schneider
MoLa: S.-L. von der Weiden, J. Diesch, S. Zorn, T. Böttger, F. Drewnick, J. Fachinger
LoLa: T. Klimach, A. Roth, S. Gallavardin, F. Drewnick, F. Freutel, J. Schmale, P. Reitz, J. Schneider, T. Böttger 

2) Paris Plume experiment (winter campaign)
The Particle Chemistry Department (MPIC-PC), research groups Schneider & Drewnick, participated in the winter Paris campaign (Jan/Feb 2010) as follows:
- Mobile ground based aerosol and gas measurements (MoLa)
- Stationary ground based aerosol composition (LoLa = local laboratory), including the C-ToF-AMS and SPLAT.

People involved:
MoLa: S.-L. von der Weiden, K. Dzepina, J. Diesch, J. Fachinger, J. Schneider, F. Drewnick
LoLa: F. Freutel, T. Klimach, A. Roth, J. Schmale, P. Reitz, F. Drewnick, J. Schneider

Brands, M., M. Kamphus, T. Böttger, J. Schneider, F. Drewnick, A. Roth, J. Curtius, C. Voigt, A. Borbon, M. Beekmann, A. Bourdon, T. Perrin, and S. Borrmann: Characterization of a Newly Developed Aircraft-Based Laser Ablation Aerosol Mass Spectrometer (ALABAMA) and First Field Deployment in Urban Pollution Plumes over Paris During MEGAPOLI 2009, Aerosol Sci. Technol., 45, 46-64, doi: 10.1080/02786826.2010.517813, 2011.

Freutel, F., Schneider, J., Drewnick, F., von der Weiden-Reinmüller, S.-L., Crippa, M., Prévôt, A. S. H., Baltensperger, U., Poulain, L., Wiedensohler, A., Sciare, J., Sarda-Estève, R., Burkhart, J. F., Eckhardt, S., Stohl, A., Gros, V., Colomb, A., Michoud, V., Doussin, J. F., Borbon, A., Haeffelin, M., Morille, Y., Beekmann, M., and Borrmann, S.: 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., 13, 933-959, doi:10.5194/acp-13-933-2013, 2013.

Crippa, M., DeCarlo, P. F., Slowik, J. G., Mohr, C., Heringa, M. F., Chirico, R., Poulain, L., Freutel, F., Sciare, J., Cozic, J., Di Marco, C. F., Elsasser, M., Nicolas, J. B., Marchand, N., Abidi, E., Wiedensohler, A., Drewnick, F., Schneider, J., Borrmann, S., Nemitz, E., Zimmermann, R., Jaffrezo, J.-L., Prévôt, A. S. H., and Baltensperger, U.: Wintertime aerosol chemical composition and source apportionment of the organic fraction in the metropolitan area of Paris, Atmos. Chem. Phys., 13, 961-981, doi:10.5194/acp-13-961-2013, 2013.

Zhang, Q. J., Beekmann, M., Drewnick, F., Freutel, F., Schneider, J., Crippa, M., Prévôt, A. S. H., Baltensperger, U., Poulain, L., Wiedensohler, A., Sciare, J., Gros, V., Borbon, A., Colomb, A., Michoud, V., Doussin, J.-F., Denier van der Gon, H. A. C., Haeffelin, M., Dupont, J.-C., Siour, G., Petetin, H., Bessagnet, B., Pandis, S. N., Hodzic, A., Sanchez, O., Honoré, C., and Perrussel, O.: Formation of organic aerosol in the Paris region during the MEGAPOLI summer campaign: evaluation of the Volatility-Basis-Set approach within the CHIMERE model, Atmos. Chem. Phys., 13, 5767-5790, doi:10.5194/acp-13-5767-2013, 2013.

Freutel, F., Drewnick, F., Schneider, J., Klimach, T., and Borrmann, S.: Quantitative single particle analysis with the Aerodyne aerosol mass spectrometer: development of a new classification algorithm and its application to field data, Atmos. Meas. Tech., 6, 3131-3145, doi:10.5194/amt-6-3131-2013, 2013.

Ait-Helal, W., Borbon, A., Sauvage, S., de Gouw, J. A., Colomb, A., Gros, V., Freutel, F., Crippa, M., Afif, C., Baltensperger, U., Beekmann, M., Doussin, J.-F., Durand-Jolibois, R., Fronval, I., Grand, N., Leonardis, T., Lopez, M., Michoud, V., Miet, K., Perrier, S., Prévôt, A. S. H., Schneider, J., Siour, G., Zapf, P., and Locoge, N.: Volatile and intermediate volatility organic compounds in suburban Paris: variability, origin and importance for SOA formation, Atmos. Chem. Phys., 14, 10439-10464, doi:10.5194/acp-14-10439-2014, 2014.

Pikridas, M., Sciare, J., Freutel, F., Crumeyrolle, S., von der Weiden-Reinmüller, S.-L., Borbon, A., Schwarzenboeck, A., Merkel, M., Crippa, M., Kostenidou, E., Psichoudaki, M., Hildebrandt, L., Engelhart, G. J., Petäjä, T., Prévôt, A. S. H., Drewnick, F., Baltensperger, U., Wiedensohler, A., Kulmala, M., Beekmann, M., and Pandis, S. N.: In situ formation and spatial variability of particle number concentration in a European megacity, Atmos. Chem. Phys., 15, 10219-10237, doi:10.5194/acp-15-10219-2015, 2015.

Beekmann, M., Prévôt, A. S. H., Drewnick, F., Sciare, J., Pandis, S. N., Denier van der Gon, H. A. C., Crippa, M., Freutel, F., Poulain, L., Ghersi, V., Rodriguez, E., Beirle, S., Zotter, P., von der Weiden-Reinmüller, S.-L., Bressi, M., Fountoukis, C., Petetin, H., Szidat, S., Schneider, J., Rosso, A., El Haddad, I., Megaritis, A., Zhang, Q. J., Michoud, V., Slowik, J. G., Moukhtar, S., Kolmonen, P., Stohl, A., Eckhardt, S., Borbon, A., Gros, V., Marchand, N., Jaffrezo, J. L., Schwarzenboeck, A., Colomb, A., Wiedensohler, A., Borrmann, S., Lawrence, M., Baklanov, A., and Baltensperger, U.: In situ, satellite measurement and model evidence on the dominant regional contribution to fine particulate matter levels in the Paris megacity, Atmos. Chem. Phys., 15, 9577-9591, doi:10.5194/acp-15-9577-2015, 2015.

Freutel, Friederike: Einzelpartikel- und Ensemblemessungen mit dem Aerosolmassenspektrometer (AMS): Untersuchungen zu Quellen und chemischer Zusammensetzung von Aerosolpartikeln im Submikrometerbereich, PhD thesis (in German), University Mainz, 2012.

Brands, Marco: Aufbau eines flugzeuggetragenen Einzelpartikel-Aerosolmassenspektrometers, PhD thesis (in German), University Mainz, 2009.

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