[ES_JOBS_NET] PhD opportunity at LSCE, Gif-sur-Yvette, France on soil organic matter modelling (ORCHIDEE, 13C & 14C)

Erika Marín-Spiotta marinspiotta at wisc.edu
Fri Mar 14 23:43:15 MDT 2014

---------- Forwarded message ----------
From: Hatté Christine <Christine.Hatte at lsce.ipsl.fr>

On the use of isotopic tracers of carbon (13C and 14C) to constraint the
soil carbon dynamic in the continental biosphere model ORCHIDEE.

The role of soil carbon in the climate dynamic is one of the major
uncertainties in the Earth system models used to predict future climate
change. A method to reduce such uncertainties is the use of sites data
obtained on very contrasted situations to better constraint the parameters
controlling the organic matter mineralization. However, regarding the very
simple representation of the soil organic matter dynamic in such model, the
comparison with data is very complex. One of the promising approaches
emerging from literature is the use of carbon isotopes data (13C and 14C)
that can be considered as integrators of the soil carbon dynamic for time
scales (year to century) coherent with the carbon cycle anthropogenic
perturbation time scale. The thesis objective will be the utilization of
existing isotopic data completed by new samples if necessary to better
constrain the soil carbon dynamic of the IPSL continental biosphere model,
the ORCHIDEE model. First, a data analysis will be necessary and then the
model will be improve by the representation of more realistic mechanisms
and in particular microbial related mechanisms that control the soil carbon
dynamic. This thesis will be done within a high level network of national
and international collaboration giving the opportunity to the candidate to
develop a double skill in isotopic biogeochemistry and in modelling.
The candidate should have a Master diploma and have experience in either
mathematical representation of processes or geochemistry, biogeochemistry,
ecophysiology or functional ecology.
PhD supervisors: Bertrand Guénet (LSCE) and Christine Hatté (LSCE)

host laboratory: LSCE (Laboratoire des Sciences du Climat et de
l'Environnement), Saclay, France

contact: Bertrand Guénet (bertrand.guenet..at..lsce.ipsl.fr) and Christine
Hatté (christine.hatte..at..lsce.ipsl.fr)
Applications should included a CV, a 1-2 page cover letter, electronic
copies of all diplomas and of transcripts (from baccalauréat, i.e. the UK
A-level or the US high school diploma)  and the contact information of
referee(s) or recommendation letter(s)

deadline for application: March 31th, 2014.


*Christine HATTÉ*

Domaine du CNRS
F-91198 Gif-sur-Yvette Cedex
tel : +33 1 6982 3512
cell: +33 6 7286 5493
fax: +33 1 6982 3568
email:  christine.hatte at lsce.ipsl.fr
page:  http://www.lsce.ipsl.fr/Pisp/12/christine.hatte.html<christine.hatte@lsce.ipsl.fr>
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