LE STUDIUM RESEARCH FELLOW / ARD 2020 - PIVOTS Programme
Dr Wahid Mellouki & Dr Véronique Daële
Atmospheric chemical processes and new advanced instrumentation for Atmospheric Reactivity Platform
Atmospheric simulation chambers are among the most advanced tools for investigating the atmospheric processes to derive physico-chemical parameters which are required for air quality and climate models. Recently, the ICARE-CNRS in Orléans (France) has set up a new large outdoor hemispherical simulation chamber (HELIOS - volume of 90 m3) positioned on the top of its building. The platform is one of the most advanced simulation and largest outdoor chambers in Europe and is especially suited to the physico-chemical processes studies performed under realistic atmospheric conditions. The chamber is made of FEP film ensuring more than 90 % solar light transmission and is protected against severe meteorological conditions by a moveable protection unit. HELIOS is mainly dedicated to the investigation of the chemical processes under different conditions (sunlight, artificial light and dark). The platform allows conducting the same type of experiments under both natural and artificial light irradiation. The available large range of complementary and highly sensitive instruments allows investigating the radical chemistry, gas phase processes and aerosol formation under realistic conditions.