Young scientist position on inverse modeling of global NO2, SO2 and NH3 emissions using satellite observations

Durée 24 months
Laboratoire hôte 1474162
Grade/Niveau Post-doc / young scientist
Début du contrat 01/01/2022
Rémunération Competitive with full social and health benefits, includes work experience.
Date limite candidature 31/03/2022


The Laboratoire des Sciences du Climat et de’Environnement (LSCE) is looking for a motivated postdoc / young scientist candidate for the ESA funded WOREM project aiming to produce new estimates of global emissions of greenhouse gases and pollutants.


Nitrogen and sulfur dioxide, NO2 and SO2, are primary pollutants emitted by the combustion of fossil fuels and wildfires which impact climate, air quality and atmospheric chemistry. Ammonia (NH3) is mainly emitted by agricultural activities, as well as industrial processes and wildfires. These species have a short lifetime in the atmosphere and produce nitrate and sulfate aerosols.

Satellite instruments like IASI/METOP and TROPOMI/Sentinel-5P measure the global column concentrations of these species over the entire globe on a daily basis. This job position aims to assimilate these observations into the global atmospheric chemistry transport model LMDZ INCA at a resolution of 1° globally to infer time varying emissions of these three key pollutants. The model calculates all atmospheric processes that control their chemical lifetime and atmospheric transport.

We propose to use a perturbation method where the LMDZ INCA model will be prescribed with varied a priori global emissions maps to calculate the local sensitivities of the concentrations of NO2 , SO2 and NH3 to surface emissions from fossil fuel burning, agriculture and wildfires, and use these sensitivities to invert emissions by matching IASI and TROPOMI observations. High profiles publications are expected from the interpretation of emissions, and their changes during the COVID period.

The candidate is expected to build and test the inverse modeling system based on LMDZ INCA and produce periodical update of emissions. Engineering support will be provided by KAYRROS, a Paris-based fast-growing EO company. The research will be performed at LSCE in collaboration with Tsinghua University and key partners of the ESA-funded WOREM project, the Free University of Brussels and Max Planck Institute of Chemistry in Mainz, Germany, and Amsterdam University.

Application :

Please submit an application package with (1) curriculum vitae including most important recent
publications, (2) statement of motivation (3) answers to the selection criteria above (4) names,
addresses, phone numbers, and email of at least two references.


Compétences requises

Programming skills, preferably in Fortran.
Understanding and processing of satellite data and statistical analysis.
Knowledge of atmospheric chemistry and transport modeling
Selection Criteria:
PhD in atmospheric chemistry / aerosols modeling / inverse modelling
Experience with using satellite observations
Autonomy, ability to work in a team and time management skills
Skills for multidisciplinary team-based activities with the ability to effectively communicate
with colleagues and with staff from the partners of the project