The position is part of the "Observation System" activities of the CaPPA labex, with a particular focus on aerosol measurements and impacts using multi-wavelength lidar data from the ATOLL-ACTRIS observation platform. A lidar data inversion strategy is currently being developed, and has given rise to a first version of the automated processing system (AUSTRAL). This flexible system is made up of elementary building blocks (forward model (scattering), and inverse model) which enable the profiles of aerosol optical and microphysical properties to be restored, and their impacts to be assessed. The candidate will join the scientific development team. He/she will be involved in validating AUSTRAL using independent data, enriching the inverse code, and assessing the contribution of different scattering models (Mie, Spheroidal, Hexahedral, Fractal) to the study of aerosol events detected by the ATOLL platform (smoke, dust, pollen, pollution and mixing). In particular, the algorithm will be adapted to the new fluorescence lidar due to go into operation in early 2024. This work will also contribute to the PYROSTRAT project (study of the impact of smoke), and will enable similar lidar data from other French lidar measurement stations to be used within the ACTRIS-FR research infrastructure.

The successful candidate will be in charge of validating the AUSTRAL code and developing new scientific modules and their analysis on ATOLL station data

The Laboratoire d'Optique Atmosphérique (LOA) is internationally recognized for its developments in radiative transfer and inverse methods in atmospheric remote sensing using instruments on board satellites and from the ground, focusing on the study of aerosols. LOA, in collaboration with NASA, is at the origin of the AERONET network. The LOA has created, operates and maintains an atmospheric platform (ATOLL) that enables continuous monitoring of atmospheric composition using a wide range of ground-based remote sensing instruments, including several lidar systems (LILAS, METIS, LIFE), and in situ instruments. The platform's aerosol remote sensing and in situ components are part of the ACTRIS National Facility infrastructure. Finally, the automated lidar data processing system AUSTRAL was developed at LOA. The position is located in an area subject to the protection of scientific and technical potential (PPST) and therefore requires, in accordance with regulations, your arrival to be authorized by the competent MESR authority