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LSCE: Post-Doc opportunities about the GLOBAL METHANE CYCLE  

Voir attache / see attached

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LABORATOIRE DES SCIENCES DU CLIMAT ET DE L’ENVIRONNEMENT
Unité Mixte de Recherche CEA-CNRS-UVSQ
LSCE-Orme - Bât. 701 - Orme des Merisiers - 91191 Gif-sur-Yvette Cedex Tél. : 01 69 08 77 11 - Fax : 01 69 08 77 16
LSCE-Vallée - Bât. 12 - avenue de la Terrasse - 91198 Gif-sur-Yvette Cedex Tél. : 01 69 82 35 23 - Fax : 01 69 82 35 68
Post-Doc opportunities about the GLOBAL METHANE CYCLE at
Laboratoire des Sciences du Climat et de l’Environnement (LSCE, France):
A 2-year Post-Doc on Evaluating inverse models and assessing the transport of biomass burning emissions
This position is open in the framework of a US Gordon and Betty Moore Foundation project: Tropical FLUXNET-CH4. The tropics are
an important source region for methane emissions (around 65%), yet we lack measurements to constrain land surface models with flux
tower data, and atmospheric inverse systems with atmospheric methane concentrations. Atmospheric inverse system, also called top-
down approaches, combine information from atmospheric measurements and prior knowledge of methane fluxes at the surface to
statistically optimize methane sources (and sinks) while reducing the difference model-observations. Different inverse systems contribute
to the Global Methane Budget that is regularly release to the community (Kirschke et al., 2013; Saunois et al., 2016 ; 2020). For the
coming budget 2000-2020 simulations have been performed by 7 inverse systems, creating an ensemble of more than 20 simulations.
The resulting emissions distributions and trends varies among the simulation ensemble.
This work aims at developing a systematic method to evaluate the different inverse systems against independent observations (surface,
satellite - not used in the inversions, Aircraft data, Aircore profiles, TCCON columns), and propose metrics to assess the performance of
the individual simulations. Deeper studies will focus on the Tropics and, specifically on the vertical and horizontal transport of biomass
burning emissions.
The work will be divided in different tasks:
- Gather the 3D optimized atmospheric field of methane from the inverse modelling groups
- Analyze the individual simulated growth rate, then the vertical profiles in comparison with data from the different observing systems
- Analyze the consistency of the emissions distribution patterns among the simulations, especially in the Tropics
- Analyze the transport of biomass burning plumes in the Tropics
- Develop and test the addition of a pyrogenic injection height module in the LMDz transport model, and perform forward and inverse
runs with the CIF-LMDz to test the sensitivity of the model; a special focus will be the impact of the injection heights in the model as
seen by satellite platforms.
The successful candidate will be hired for 12 (extensible to 24 months) and work in Saclay (20 km South of Paris), France, under the
guidance of the inverse modelling team at LSCE, developing links between the GCP different inverse modelling groups worldwid

Post-Doc_LSCE_Moore_2022_eng.pdf (303 Ko)

A. Mazaud, dépêche du 23/03/2023