Offer Description
Thesis supervision, training follow-up, and research progress modalities: The doctoral student (M/F) will be supervised by Dr. Slimane Bekki (LATMOS, Paris) and Dr. Sergey Khaykin (LATMOS), with additional support for numerical modeling (provided by Marion Marchand, LATMOS) and technical support (provided by Eric d'Almeida, LATMOS). He/She will be fully integrated into the ISAC project and the LATMOS laboratory. Research progress will be regularly monitored through meetings with thesis…
supervisors, as well as during periodic meetings with the French and international partners of the ISAC project. A thesis monitoring committee will be set up from the beginning of the PhD to track the progress of the work and, through annual evaluations, ensure compliance with training requirements and alignment with project objectives. Doctoral training will be administered by the Doctoral School ED127. The doctoral student (M/F) will also participate in ISAC field campaigns to collaborate with experimental scientists, as well as in international workshops for the dissemination of results. All project-related expenses (fieldwork, travel, conferences) will be covered by the ANR ISAC project.
The unprecedented expansion of space activities, marked by an exponential increase in rocket launches and satellite deployments, has outpaced our understanding of their atmospheric impacts. Emissions from launches and space debris re-entry threaten the stratospheric ozone layer and climate, but the absence of comprehensive observations of gaseous and particulate pollutants of space origin in the stratosphere forces researchers to rely on unvalidated hypotheses regarding the properties of aerospace particles (morphology, composition, size distribution, global distribution, chemical reactivity, and radiative properties). This gap introduces major uncertainties in environmental assessments, hindering the development of effective mitigation strategies.
The ISAC project (Stratospheric Impacts of Space Activities), funded by the ANR, addresses this challenge by aiming to identify and characterize particles from space activities. Through a combination of in-situ optical measurements, particle collection via stratospheric balloons, and advanced laboratory analyses, ISAC will provide unprecedented data to evaluate, refine, and constrain global stratospheric chemistry-aerosol-climate models, simulating the stratosphere's response to the sustained growth of space activities.
Within the ISAC project (Stratospheric Impacts of Space Activities), the main objectives of the thesis are:
- Develop and implement new parameterizations of particles from space activities in the LMDz-REPROBUS global stratospheric chemistry-aerosol-climate model, and evaluate them through comparisons between sensitivity simulations and observational data.
- Identify the key microphysical, chemical, and radiative processes governing the evolution of particles from space activities and their impacts in the middle atmosphere, through the analysis of in-situ and remote sensing observations.
- Quantify the potential global impacts of particles from space activities on the stratospheric ozone layer and radiative forcing, and provide scientific insights to inform future climate and space policy discussions.
Requirements
Research Field: Environmental science; Environmental science » Earth science; Environmental science » Global change
Education Level: Master Degree or equivalent
Languages: French — Level: Basic
Years of Research Experience: None
Additional Information
Website for additional job details: https://emploi.cnrs.fr/Offres/Doctorant/UMR8190-SLIBEK-011/Default.aspx
Where to apply
Website: https://emploi.cnrs.fr/Offres/Doctorant/UMR8190-SLIBEK-011/Default.aspx
Work Location(s)
Number of offers available: 1
Company/Institute: Laboratoire "Atmosphères et Observations Spatiales"
Country: France
City: GUYANCOURT
Contact
City: GUYANCOURT
Website: http://www.latmos.ipsl.fr
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