• MNO 2014

    MNO 2014

    The University Lille 1 will host the Second International Workshop on Metallic Nano-Objects (MNO 2014) from 13th to 14th November 2014.
  • PHOTO4E

    PHOTO4E

    PHOTO4E conference, set to take place at IFPEN in Lyon on 15, 16 and 17 October 2014, as part of its Rencontres Scientifique
  • GDR  2014

    GDR 2014

    10-14 juin 2014 - Strasbourg - Réunion annuelle du GDR Nanoalliages
  • PhotopaQ Conf.2014

    PhotopaQ Conf.2014

    PhotopaQ Conf.2014 "Photocatalysis: Science and Application for Urban Air Quality", Lyon from April 15th to 17th 2014 in the framework of the EU LIFE+ project PhotoPAQ.
  • Atmos'Fair 2014

    Atmos'Fair 2014

    Atmos'Fair 2014 : 24 & 25 September 2014

The LISA Laboratory

The Inter-universitary Laboratory of Atmospheric Systems (LISA) is a French leading laboratory in the field of atmospheric chemistry and physics comprising around hundred scientists including 67 permanent positions. Continuously appointed by CNRS, the laboratory belong in addition to two different Parisian universities (Paris Diderot University and University Paris-Est at Creteil - UPEC ). The approaches developed at LISA to study atmospheric chemistry, rain chemistry, aerosol chemistry and physics and cultural heritage preservation involve computer simulation, field measurements, satellite measurement, spectroscopy, and experimental simulation.

The MEREIA Group at LISA

The overall scope of the scientific activity of the MEREIA group deals with the understanding of the chemical processes occurring in the troposphere and their consequences on the atmospheric environment.

More precisely, our work is focused on the fate of the tropospheric organic matter (gaseous and particulate) and its impact on air quality, and climate by combining laboratory experiments and field and airborne measurements

In the laboratory, in order to study these phenomena while keeping the experimental conditions controlled, well defined but close as possible from the atmospheric condition, we have adopted the experimental simulation as the base methodology. This approach requires heavily equipped tools: simulation chambers.

On the field, the study the study of the oxidizing photochemical processes rely on the measurement, in various environments, of the low level concentrations of gaseous precursors as well as secondary species such as ozone, volatile organic compounds (VOCs), nitrogen oxides (NOX, NOy…), nitrous acid (HONO), peroxyacetyl nitrate (PAN)…

The research activities of the group are organized into the following topics:
– The oxidizing capacity of the atmosphere;
– The formation and the evolution of atmospheric organic aerosols;
– The atmospheric cycle of VOCs (sources, transport and reactivity);
– The spectroscopy of molecule of atmospheric interest.

The CESAM simulation chamber

The CESAM reactor has been designed to investigate the interactions (exchange, condensation, chemical reactivity, dissolution…) between gas and solid phases. As the radical sources we will be investigated are photo-induced, a great care has be taken with the realism of the irradiation. This device is equipped with up-to-date analytical tools to characterize the chemical and the physical state of gas, aqueous and solid phases. Moreover, this chamber is located in a 170 m2 hall based in the ground floor which enables an easy access for heavy instruments (PTR-MS, AMS, IRMS,…).

One key feature of this chamber is that its versatility enable numerous connections to the chamber for other instruments, making CESAM a good platform for intercalibration campains.

Another key feature is the possibility to generate cloud/fog inside the chamber to study hydrometeores photochemistry or aerosol ageing during avapo-condensation processes.

Furthermore, it is possible to study atmospheric photochemistry at various altitude : Thank to a filter set-up, it is possible to adjust the light source in order to work with solar spectra representatives from ground level to 60 km altitude.

The MILEAGE mobile laboratory

Our Mobile laboratory MILEAGE (MobIle Laboratory for Extensive Gas mEasurements), developed at LISA, allows measurements of atmospheric species at low concentrations and for different weather situation.

This tool was developed to improve our know ledges concerning ozone cycle, atmospheric pollutants measurements in the continental boundary layer.

Mobile MILEAGE allows gas trace measurements at different scales : in urban area (primary pollutants sources); in sub-urban or rural place (secondary compounds), in remote place (background atmosphere composition).

MILEAGE is a Renault Master 3.5t, which has been modified to welcome:
– a Gas-chromatograph (GC) with a flame ionization detector (FID) to measure NMHC (C3-C10);
– a NOx-Toy instrument to measure with the luminol fluorescence techniquesnitrogen species at low concentrations (NO, NO2 and NOy, environmental monitors (Ozone , Nitrogen oxides (NO, NO2), CO…);
– a Weather station (max : 9 m), Photolysis frequencies (JNO2, …);
– A liquid chromatography to measure HONO and HNO3 (NitroMAC);
– An automatic sampler for NMHCs and carbonyl compounds (AMOVOC);
– GC-ECD to detect PeroxyAcetylNitrate (PAN).

logo LISA

Web site:
http://www.lisa.univ-paris12.fr

Contact:
Pr. Jean-François Doussin
doussin@lisa.univ-paris12.fr

Laboratoire Interuniversitaire
des Systèmes Atmosphériques (LISA)
Faculté des Sciences
61, avenue du Général De Gaulle
F-94010 Créteil cedex
France