Partner 6.2 - CNRS-LSCE (France)
Centre National de Recherche Scientifique (CNRS)
Laboratoire des Sciences du Climat et de l'Environnement (LSCE)

Expertise and experience of the organization
The Laboratoire des Sciences du Climat et de l'Environnement (LSCE) is a joint research unit of the CNRS, the CEA and the University of Versailles St-Quentin. The LSCE (staff 250) is part of the Institut Pierre Simon Laplace (IPSL). The laboratory activities is divided into three main broad research topics including Climate, Biogeochemical Cycles, and Geochronology-Geochemistry. The experience and qualification of LSCE researchers relevant to MEGAPOLIS comprise a unique expertise in air quality including measurements of trace gases with a focus on VOC compounds, and of aerosols with a focus on aerosol optical properties and size-resolved chemical composition. Expertise includes both ground-based and airborne measurements, and vertical profiling with lidar systems. The CEA will make available resources for the MEGAPOLI Project, in terms of unfunded personal contributing to the project. CEA will be represented in this project by CNRS via clause 10.

Role and contribution

Ground based gas phase and aerosols measurements, airborne lidar measurements during the dedicated campaign in Paris region in WP3.

Principal personnel involved
Dr. Jean Sciare (CNRS Res. Sci., Team Leader; Ph.: +33-1-69087967; Fax: +33-1-69087716, e-mail: - is an atmospheric chemist CNRS, working now at LSCE on the experimental characterisation of tropospheric aerosols. Following his engineer diploma in chemistry in 1994, and a 14-month period at Amsterdam Isl. (French Austral islands) as responsible for atmospheric monitoring activities, he received PhD (Univ. Paris VII) in 2000 at LSCE on the study of the formation of biogenic aerosols (DMS cycle) in the Austral Ocean. After a 1-year post-doc at MPI (biogeochemistry group, Resp. M.O. Andreae), he obtained a permanent CNRS position at LSCE in 2001. He has participated in many international field and oceanographic campaigns including BIOGEST, PAURII, MTPII-MATER, MARATHON, ELCID, LBA-CLAIRE, MINOS, OOMPH. His current activities are focussed on the study of urban aerosols in megacities (e.g. Beijing, Cairo, Paris) and the development of techniques to enable in-situ fast and artefact-free measurements of the main chemical components of sub(super) micron aerosols.
Dr. Valérie Gros (CNRS Res. Sci.; Ph.: +33-1-69087967; e-mail: – is an atmospheric scientist at CNRS. She received her Ph.D. in 1998 at LSCE on the experimental study of ozone and carbon monoxide at Amsterdam Island (French austral island). Between 1999 and 2004, she worked at the Max Planck Institute for Chemistry in two different groups (isotope group and organic reactive species group). She has participated in many international field campaigns including AEROBIC, MINATROC, UTOPIHAN, HOHPEX, OOMPH and a summer campaign at Amsterdam Island. She is author or co-author of more than 20 peer-reviewed publications. She got a CNRS permanent position in 2004 and is now working at the LSCE studying volatile organic compounds and their impact on the oxidising capacity of the troposphere and on aerosol formation. She leads the French young researcher ANR program “AEROCOV”, on interaction of VOCs and secondary organic aerosols in megacities.
Dr. Bernard Bonsang (Senior Sci.; Ph.: +33-1-69087888; e-mail: - is researcher at CNRS, is working in the field of atmospheric chemistry since 1973. His research mainly concerns the study of the oxidising capacity of the atmosphere with emphasis on the role of VOCs and related species in the budget of ozone and oxidants. He is graduated from university of Paris VI (MSc, 1973, and PhD in Nuclear Chemistry, 1974; and French ‘thèse d’état’ in atmospheric chemistry of sulphur species, 1980), he has spent a 1 year post doctorate at NCAR (Boulder CO, USA)   He has participated in more than 30 field campaigns over continental or marine areas. He has been coordinator of EC projects (FIELDVOC, AEROBIC) and PI of several other national, EU, and international projects (OCEANONOX, EUROTRAC/ASE, FOS/DECAFE, DYFAMED, TROPOZ, ASTEX/MAGE) in the field of tropospheric chemistry.  His current activities are focussed on the study of the sources and chemistry of VOCs and related compounds mainly in remote regions and also over forests and urban areas.
Dr. Patrick Chazette (Senior Sci.; Ph.: +33-1-69089456; e-mail: - is a Res. Scientist at the LSCE laboratory since 1993. He has acquired his PhD in the Service d'Aéronomie with Gérard Mégie in 1990, in the field of space borne lidar dedicated to atmospheric research. He co-signs more than 40 publications in peer reviewed international journals and more than 100 presentations in International Symposia. He is in charge of multi-angular backscatter lidar development for the Commissariat à l’Energie Atomique (CEA). He is expert on the remote sensing science for CEA. He previously worked within space borne scientific studies related to ATLID (1988-1991), ALISSA (1990), BEST (1991-1992) and IASI (1991-1997) projects. He acted as PI in the international projects MEDUSE (EU project from 1996 to 1998) and INDOEX (1999). He was coordinator in the frame of various programs dedicated to air pollution as ESQUIF, POVA and LISAIR. He is also a member of this scientific French comity and of the “Terre Ocean Surface Continental Atmosphére” (TOSCA) program for spaceborne-Earth observing systems.   

Selected relevant publications
Gros V., J. Williams, J. van Aardenne, G. Salisbury, R. Hofmann, M. Lawrence, R. von Kuhlmann, J. Lelieveld, M. Krol, H. Berresheim, J. M. Lobert, E. Atlas, (2003): Origin of Anthropogenic Hydrocarbons and Halocarbons Measured in the Summertime European Outflow (on Crete in 2001), Atmos. Chem. and Phys., 3, 1223-1235.
Chazette P., H. Randriamiarisoa, J. Sanak, P. Couvert, C. Flamant, (2005): Optical properties of urban aerosol from airborne and ground-based in situ measurements performed during the ESQUIF program, J. Geophys. Res, 110, (D2), D0220610.1029/2004JD004810, 2005.
Randriamiarisoa H., P. Chazette, P. Couvert, J. Sanak, G. Mégie (2006): Relative humidity impact on aerosol parameters in a Paris suburban area, Atmos. Chem. and Phys. Discus., 1389-1407.
Hodzic A., R. Vautard, P. Chazette et L. Menut (2006): Aerosol chemical and optical properties over the Paris area within ESQUIF project, Atmos. Chem. Phys.
Lelieveld, J., N. Mihalopoulos, J. Sciare, and 30 co-authors, (2002): Global Air Pollution Crossroads over the Mediterranean, Science, 298, 794-799.
Sciare, J., H. Cachier, R. Sarda-Estève, T. Yu, (2007): Semi-volatile aerosols in Beijing (R.P. China): Characterization and contribution to various PM2.5, J. Geophys. Res., In Press.


FP7 EC MEGAPOLI, 2008-2011