Organisation/Company: Université Paris Est Créteil
Department: Faculté de Sciences et Technologie
Research Field: Environmental science » Global change, Environmental science » Earth science, Computer science » Modelling tools, Engineering » Other
Researcher Profile: First Stage Researcher (R1), Recognised Researcher (R2)
Positions: Postdoc Positions
Country: France
Application Deadline: 31 Dec 2024 - 18:00 (Europe/Paris)
Type of Contract: Temporary
Job Status: Full-time
Hours Per Week: 40
Offer Starting Date: 1 Jan 2025
Is the job funded through the EU Research Framework Programme? Other EU programme
Is the Job related to staff position within a Research Infrastructure? No
Offer Description Summary:
The CAIRT (Changing-Atmosphere InfraRed Tomography, https://www.cairt.eu/ ) explorer is one of the two candidate space mission concepts pre-selected for the European Space Agency (ESA) Earth Explorer 11 (EE11) funding scheme. In the framework of CAIRT Phase A studies, a postdoc position is offered to study the new capabilities of the EE11 CAIRT candidate mission to observe and characterise the stratospheric composition in case of stratospheric aerosol geoengineering interventions.
Main Site: LISA laboratory ( www.lisa.u-pec.fr ), near Paris (in Créteil, on Paris subway network), France, at the University Paris Est Créteil (UPEC), with possible trips to KIT laboratory in Karlsruhe, Germany and ESA premises in Nordwijk, the Netherlands.
Starting date: as soon as possible, for an 18-months duration.
Salary: based on CNRS French national scale (gross monthly salary from about 3000€ to about 4650€), depending on professional background and experience.
Keywords: satellite observations, atmospheric modelling, geoengineering, stratospheric composition.
Postdoc supervisor and environment: Pasquale Sellitto (LISA, UPEC) with frequent exchanges with other French laboratories (LMD, LATMOS) and the CAIRT Phase A international team.
Scientific background:
To cope with the observed anthropogenic climate change and its effects, stratospheric aerosol geoengineering (SAG) has been proposed as a solution. Mimicking extreme volcanic eruptions, in SAG techniques sulphur dioxide (SO2) is injected into the stratosphere with the aim of forming highly reflective and small-sized sulphate aerosol (SA) particles. These can effectively scatter back part of the incoming solar radiation to counterbalance the reduction of outgoing longwave radiation associated with the increase of greenhouse gas concentrations from anthropogenic emission. Unwanted side effects are expected in case of deployment of SAG techniques, like possible regional effects on precipitation and induced inter-hemispheric and pole-to-equator gradients in surface temperature, as well as thinning of the stratospheric ozone layer, delaying the recovery from the Antarctic ozone hole phenomenology.
The CAIRT (Changing-Atmosphere InfraRed Tomography) explorer is one of the two candidate space mission concepts pre-selected for the ESA Earth Explorer 11 funding scheme. CAIRT will be the first limb sounder with imaging Fourier-transform infrared technology in space. By observing simultaneously the atmosphere from the mid-troposphere to the lower thermosphere (about 5 to 115 km altitude), CAIRT will provide global observations of ozone, temperature, water vapour, as well as key halogen, nitrogen and sulphur compounds. As part of the development and evaluation of CAIRT concept, Phase A studies have recently kicked-off to estimate its feasibility and to quantify its added value to address key societal needs.
In the broader context of CAIRT Phase A studies, the selected postdoc researcher will study the new capabilities of the EE11 CAIRT candidate mission to observe and characterise the stratospheric composition in case of SAG interventions. To do so, she/he will use available global model fields simulating a variety of SAG scenarios for SO2, SA, ozone, ozone-depleting substances and others, sampled using an ad-hoc scene generator, and the application of linear retrievals with an existing CAIRT pseudo-observations generator (developed at Karlsruhe Institute of Technology, Karlsruhe, Germany). These will be used to evaluate the added value of CAIRT observations to the detection of initial SAG applications and to follow the spatiotemporal evolution of the involved species and the effects of SAG techniques.
Your profile:
A PhD degree in Atmospheric Sciences or Atmospheric Remote Sensing
Excellent programming (Python or Fortran preferentially) and data analysis skills
Excellent written and oral communication skills (journal papers, project reports, oral presentations of results)
Experience with satellite observations and/or global-scale numerical simulations of the Earth's atmosphere are greatly appreciated
Strong motivation to work on new generation Earth observations and societal-relevant Atmospheric Sciences topics
Ability to work co-operatively with colleagues but also to take initiative to solve problems and achieve short- and long-term goals
Application:
Interested and motivated researchers are encouraged to apply by sending a motivation letter and a CV, including their publication lists, to Pasquale Sellitto: ******
Pre-selection shortlisting of applicants will be held as soon as possible.
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