UFR de Physique

Propositions de stages en laboratoire -- M2

Les offres sont actualisées en mai. Par exemple, les offres de stages pour l'année universitaire 2015-2016 seront mises en place en mai 2015, les offres de stages pour l'année universitaire 2016-2017 seront mises en place pour en mai 2016, etc.

Advanced laser heterodyne instrument for ground-based remote measurement of vertical concentration profile of key atmospheric species

  • Option International « Atmospheric Environnement » du parcours Lumière-Matière
  • Laboratoire: Laboratoire de Physico-Chimie de l'Atmosphère (LPCA)
  • Responsable du stage: CHEN Weidong (chen@univ-littoral.fr, 03 28 65 82 64)
  • Co-responsable(s): FERTEIN Eric
  • Mots clés: Faraday rotation, Infrared spectroscopy, OH radical, gas sensing instrument
  • Fiche complète en PDF : Fiche complète en PDF

Monitoring of vertical concentration profiles of key atmospheric trace gases is extremely important for our improved understanding of regional air quality and global climate change trends. Laser heterodyne radiometry (LHR), using sunlight as spectral source for ground-based real-time, long-range, long-term remote measurements Appl. Opt. 51 (2012) 8779, offers an ideal solution for filling the gaps between ground surface measurement and air-borne remote sensing, which is also highly required for the validation of satellite observation. A proof-of-concept LHR instrument is being developed in the laboratory LPCA for simultaneous measurement of atmospheric CH4 and H2O vapor absorptions. In this proposal, we propose to develop an advanced LHR prototype, compact and robust, for ground-based in situ measurements of key trace species, such as greenhouse gases (CH4, N2O, H2O) and aerosol precursor gases (SO2, NO2), in the atmospheric column with high spatial resolution.