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March 2017
Message 67

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[Met-jobs] Postdoc Position at LOCEAN/IPSL (France)

From Guillaume Gastineau <guillaume.gastineau@locean-ipsl.upmc.fr>
To met-jobs@lists.reading.ac.uk
Date Thu, 23 Mar 2017 14:17:09 +0100

Postdoc researcher at LOCEAN/IPSL on the global impacts of climate variations 
in the Arctic

A 2-year postdoctoral position is available at LOCEAN/IPSL to work on the 
influence of the Arctic Ocean on weather and global climate. The Arctic has 
undergone remarkable changes in recent decades, with a faster surface warming 
than at other latitudes (the Arctic amplification) and a large decline of the 
sea- ice extent and thickness. The linkages between these changes, the Northern 
Hemisphere climate, and the observed increase in extreme events over northern 
continents are much debated. Some authors argue that the jet stream is becoming 
weaker, with larger meanders, as a response to the Arctic warming, therefore 
producing more persistent extreme weather during winter, while others find no 
significant linkage. In addition, many studies suggest that the interannual 
variability of Arctic sea ice extent has a significant influence on the storm 
tracks and on the Arctic Oscillation, thus likely affecting the occurrence of 
extreme events. However, the observational period is short and the 
mid-latitudes internal atmospheric variability is large, especially during 
winter, leading to a small signal-to-noise ratio. Also, modeling studies show a 
wide spectrum of responses that are difficult to interpret, reflecting 
different experimental setups and, perhaps, model diversity.

The successful candidate will more systematically investigate the impact of the 
low frequency evolution of the Arctic on lower latitudes climate and extreme 
weather events, and will establish the thermodynamical and dynamical mechanisms 
that control it. The post-doctoral fellow will perform and analyse coupled 
model experiments with the new IPSL-CM6 climate model, which will be designed 
to emphasize the role of ocean-ice-atmosphere coupling in amplifying or damping 
the Arctic warming impacts, and to differentiate it from external forcing and 
other internal influences within the climate system. The novelty of these 
experiments will be the use of large ensembles to increase the signal-to- noise 
ratio. Furthermore, these experiments will be coordinated among various 
research groups using different climate models. This will assess the robustness 
the simulated changes in response to the warming Arctic, which could be 
compared to observational estimates. Some of these experiments will be 
coordinated within the Blue-Action H2020 project of the European Commission 
(Arctic impact on weather and climate, http://www.blue-action.eu) Work Package 
3 (‘’Linkage of Arctic climate changes to lower latitudes’’). The successful 
candidate will have the opportunity to interact with the other groups to plan, 
analyze and interpret this first set of simulations. In addition, the candidate 
will be encouraged to set up original experiments to further illustrate the 
main mechanisms leading to the linkages between the Arctic and the global 
climate.

The position will be located at LOCEAN, in central Paris at the Jussieu campus 
of the university Pierre et Marie Curie – Sorbonne Universtités 
(https://www.locean-ipsl.upmc.fr/index.php). It is a joint 
CNRS/University/IRD/MNHN laboratory which is part of the Institut Pierre Simon 
Laplace (IPSL, https://www.ipsl.fr ). The candidate will work in the climate 
variability and impacts team of LOCEAN, which includes about 30 persons, and 
has a large experience in investigating the processes of climate variability, 
and climate modeling.

Candidate should have a PhD in oceanography, meteorology, or environmental 
sciences, with a good background in statistical analysis and/or climate 
modeling. The position is offered for 2 years. Payment will be in accordance 
with french public service salaries (between 2400 and 3000 euros), taking into 
account previous work experience. The preferred starting date is October 2017.

The position will be supervised by Dr. Guillaume Gastineau and Pr. Claude 
Frankignoul, with involment of Dr. Juliette Mignot. For information and 
application: guillaume.gastineau@upmc.fr and cf@locean-ipsl.upmc.fr.

Please submit before May 30th 2017 : a letter of interest, curriculum vitae, 
and the name, address, and telephone number of at least two references, and 
preferred starting date.

Guillaume Gastineau
LOCEAN/IPSL BP100
4 place Jussieu
75252 Paris Cedex 5


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