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Portail > Offres > Offre UMR5001-BERBOE-022 - Expert en calcul scientifique – Modélisation du système climatique H/F

Expert in scientific computing - Modelling of the Climate System

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : lundi 27 février 2023

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General information

Reference : UMR5001-BERBOE-022
Nombre de Postes : 1
Workplace : ST MARTIN D HERES
Date of publication : Tuesday, November 29, 2022
Type of Contract : FTC Technical / Administrative
Contract Period : 24 months
Expected date of employment : 1 June 2023
Proportion of work : Full time
Remuneration : from 2583,56€ to 2966,57€ (depending on experience)
Desired level of education : Engineer
Experience required : Indifferent

Missions

The general mission is to develop the coupling framework between the IPSL-CM climate model and the Elmer/Ice ice-sheet model. The selected candidate will contribute to the ESM2025 H2020 project.

Scientific and technical context:
Ice sheet dynamics had long been thought to be in quasi-steady state on centennial timescales until satellite ice sheet observations in the 1990s revealed a significant imbalance, with acceleration and thinning of important ice streams in Greenland and Antarctica. This ice mass loss is expected to accelerate in a future, warmer climate as surface melting increases and dynamical ice sheet instabilities driven by melt and collapse of floating ice shelves are triggered. Loss of mass affects not only the ice sheets themselves, but also leads to the input of significant volumes of freshwater into the ocean. The most prominent impact of this is an increase in global sea level, but the additional freshwater will have other effects, such as significantly affect the Atlantic overturning circulation and Southern Ocean stratification. None of these feedbacks are represented in state-of-the-art Earth System Models, which still assume ice sheets are currently in steady state and will remain in their current forms in all future scenarios. Interactively simulating ice sheets will also improve the realism of the projections of ice sheet contribution to sea level rise, which are very difficult to derive from “offline” simulations, with more than an order of magnitude uncertainty on ice-shelf melt rates.
The IPSL-CM model, developed at the Pierre-Simon Laplace Institute (Paris) includes the NEMO ocean model and the LMDZ atmosphere model. An Antarctic configuration of the Elmer/Ice ice-sheet model has previously been coupled to a global ocean configuration of NEMO. The remaining step to have Elmer/Ice coupled to IPSL-CM is to couple LMDZ to Elmer/Ice within the IPSL-CM coupling framework.

Activities

- Run the IPSL-CM model with Elmer/Ice coupled to NEMO (previously developed).
- Develop the coupling interface between LMDZ and Elmer/Ice, whereby Elmer/Ice updates the ice-sheet topography seen by LMDZ and LMDZ provides the surface mass balance to Elmer/Ice, with a first focus on the Antarctic ice sheet, then on the Greenland ice sheet.
- Produce climate simulations on the national computing infrastructures, then adapt and optimize the codes on upcoming supercomputers.
- Conduct regular technological survey and write documentations.
- Share developments within the IPSL and Elmer/Ice communities, in particular through the formation of students, postdocs and other engineers.
- Participate to the ESM2025 work package discussions and meetings.

Skills

- Demonstrated experience in atmosphere or climate modelling.
- Demonstrated experience in Fortran and Python coding.
- Demonstrated experience in any aspect of high-performance computing.
- Basic understanding of the climate system.
- Demonstrated ability to work within a team.
- Required level of studies: Completed PhD or Engineering School.

The selection panel will also consider the gender balance of the entire research team.

Work Context

The selected candidate will work at the Institute for Environmental Geosciences (IGE), which is a public research institute under the affiliation of CNRS, IRD, University Grenoble Alpes, and Grenoble-INP. It brings together about 250 people, including 150 permanent members (researchers, teacher-researchers, engineers) and about a hundred contractual agents (doctoral students, postdocs, engineers and technicians). The institute also welcomes several dozen trainees and scientific visitors every year. It is located on two sites of the Grenoble University Campus (GLACIOLOGY and OSUG-B/MCP) that are 5 minutes away from each other. IGE is one of the main institutes within the Observatoire des Sciences de l'Univers de Grenoble (OSUG) which is a federative structure of INSU.

The selected candidate will join the CryoDyn team, which has a focus on ice dynamics and connections to the climate system. The person will be supervised by Nicolas Jourdain and Pierre Mathiot.

Constraints and risks

Without.
The research will be carried out in either French or English, however it is expected that the non-French speaking candidate will strive to learn the basics of French in order to facilitate communication and integration into the laboratory.

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