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Reference : UMR8518-PHIDUB-004
Workplace : VILLENEUVE D ASCQ
Date of publication : Tuesday, April 06, 2021
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 5 April 2021
Proportion of work : Full time
Remuneration : between €2675.28 and €3084.60 gross per month
Desired level of education : PhD
Experience required : 1 to 4 years
The Laboratoire d'Optique Atmosphérique offers a one-year (renewable) research position on a fixed-term contract in the context of the FORUM (Far-Outgoing Radiation Understanding and Monitoring) satellite mission recently selected as the European Space Agency's 9th Earth Explorer. FORUM, scheduled for launch in 2025, will measure the infra-red spectrum (6.25 to 100 mic) of the Earth-atmosphere system at very high spectral resolution. The main objective of the mission is to provide the first complete emission spectrum of the Earth-atmosphere system in order to improve our understanding of climate. These unique spectra will also improve the representation of geophysical variables essential for climate such as stratospheric water vapour, the microphysical properties of ice clouds and surface emissivity. This offer will focus more specifically on the study of ice clouds and the improvement of their representation in climate models. Indeed, the modelling of clouds, and in particular their radiative impact, remains one of the major challenges of climate modelling, and the main cause of divergence between the different climate models. Ice clouds, which are ubiquitous on Earth and cover on average about 50% of the Earth's surface, are particularly problematic, both because their formation processes remain poorly understood and because of the morphological complexity of ice particles, which give them equally complex optical properties.
The selected candidate will first have to identify and evaluate microphysical models of the optical properties of ice clouds in order to participate in the international effort to propose a coherent model over the entire electromagnetic spectrum, from the visible to the microwave, and covering in particular the far infra-red measured by the FORUM instrument.
In a second step, the candidate will develop an algorithm to improve the restitution of the microphysical and macrophysical properties of ice clouds by combining the observations of the FORUM and IASI-NG instruments (IASI-NG will also measure the spectrum emitted by the Earth-atmosphere system in a narrower spectral range).
PhD in atmospheric science
Experience in algorithmic development
Good command of oral and spoken English
Ability to work independently and as part of a team
Expertise in programming languages (Python, fortran, C)
The candidate will work at the Laboratoire d'Optique Atmosphérique (LOA) in the "cloud" team. He/she will be required to collaborate with the French National Centre for Meteorological Research in Toulouse with which a research proposal related to the FORUM instrument has been submitted and funded by the French National Centre for Space Studies. This proposal concerns the preparation for the use of the measurements provided by the FORUM instrument to improve our understanding of climate, and in particular of general circulation models (GCMs), in order to reduce the uncertainties associated with climate change simulations. The candidate will participate in international conferences to present his/her scientific results and in some meetings of the Mission Advisory Group (MAG) of the FORUM instrument at ESA headquarters in Noordwijk, the Netherlands.
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