Postdoc position in paleoclimate data assimilation

LOCEAN/IPSL, Paris, France
Closing date: not specified

Data assimilation systems are powerful approaches to understand the mechanism of climate variability in the past, contextualize recent climate change and improve near-term decadal prediction systems. Paleoclimate data assimilation methods (e.g., particle filter and ensemble kalman filter) constitute a promising approach to improve our understanding of natural climate variability recorded in proxies (e.g., tree rings, ice cores, speleothemes) that may result from external forcing, but also from internal interactions between the components of the climate system.

Based on the complementary scientific expertise of the project partners, the Synergia CALDERA project aims at developing paleoclimate data assimilation with the IPSL climate model to optimally estimate past climate states that are both consistent with the climate signal recorded in proxies, the physical laws and dynamical mechanisms of the climate systems represented by climate models.

The partners of the project invite applications for the following position: Post-doctoral researcher

Main activities
The successful candidate will develop proxy-data assimilation systems for the climate of the last 2000 years with the fast running coupled ocean-atmosphere model developed at IPSL and analyse the simulations, in collaboration with the other scientists on the project. The technical aspects will be supervised and implemented by a computer scientist specifically dedicated to this project. The post-doctoral scientist will provide innovative scientific methods related to assimilating proxy records in the model, and determine the processes at the origin of the model-based climate variability reconstructed for the common era.

The activity of the LOCEAN host team (VARCLIM) focuses on the study of physical processes that control the dynamics and variability of the ocean and climate on a wide range of time and space scales for a better understanding of the climate system and its present, past and future evolution. The LOCEAN laboratory ( is one of nine laboratories in Ile-de-France in environmental and climate sciences at the Institut Pierre-Simon Laplace (IPSL) ( The close synergy between LOCEAN’s scientific teams and other IPSL laboratories within the IPSL Climate Modelling Centre ( allows research and development of a climate model based on the integration of several components for the atmosphere, ocean, sea ice and continental surfaces. It regularly participates in international exercises such as the Climate Model Intercomparison Project (CMIP), on which the work of the Intergovernmental Panel on Climate Change (IPCC) is based. The modelling activity is based both on GENCI’s major national computing centres and on a dedicated IT infrastructure located at IPSL. The post-doctoral scientist will join a very dynamic scientific team at LOCEAN and will work closely with about ten engineers and researchers who are at the heart of the development of the IPSL climate model.

The position is based on the Pierre et Marie Curie campus of Sorbonne University in Paris.

Required qualifications

  • To have a PhD in climatology, Earth science or related field (physics, informatics) ;
  • To have published in peer-reviewed international journals;
  • To have strong experience in programming and in managing large data sets;
  • To have demonstrated verbal and written communication skills in English;
  • To have interest in working in a multidisciplinary team environment.
  • To have knowledge of statistics and mathematical processing.

Employment situation and conditions
The recruited post-doctoral scientist will work in collaboration with experienced LOCEAN and IPSL researchers and engineers and will collaborate closely and regularly with the IPSL-CMC group (

Starting date between January 1 and March 1, 2020
Full time position for 24 months – can be extended up to 48 months
Net monthly salary: 3 815 €  (commensurate with experience – includes social insurances)
Location: LOCEAN, Institut Pierre Simon Laplace, Paris, France

How to apply?
Applicants should send via e-mail to Myriam Khodri ( (i) a statement of research experience, qualification and interest, (ii) a complete CV including a list of publications, and (iii) the name of two scientists who would agree to send a letter of recommendation.

Review of the applications will start November 30 2019 and the call is open until the position is filled.


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