Pause
Read
CEA vacancy search engine

Interpretation of diurnal and synoptic variabilities of atmospheric CO2 in Paris region H/F


Détail de l'offre

Informations générales

Entité de rattachement

Le Commissariat à l'énergie atomique et aux énergies alternatives (CEA) est un organisme public de recherche.

Acteur majeur de la recherche, du développement et de l'innovation, le CEA intervient dans le cadre de ses quatre missions :
. la défense et la sécurité
. l'énergie nucléaire (fission et fusion)
. la recherche technologique pour l'industrie
. la recherche fondamentale (sciences de la matière et sciences de la vie).

Avec ses 16000 salariés -techniciens, ingénieurs, chercheurs, et personnel en soutien à la recherche- le CEA participe à de nombreux projets de collaboration aux côtés de ses partenaires académiques et industriels.  

Référence

2021-18093  

Description de la Direction

La Direction de la recherche fondamentale (DRF) du CEA mène des activités scientifiques dans les domaines de la physique, de la chimie, de la biologie et santé, des sciences des matériaux, des sciences du climat et de l'environnement, du numérique.Elle regroupe plus de 6000 personnes, sur les centres de Cadarache, Grenoble, Marcoule et Paris-Saclay, qui développent et mettent en œuvre des technologies et des instrumentations à la pointe de la recherche et de l'innovation.

Description de l'unité


Le LSCE est une unité mixte de recherche (UMR 8212) entre le CEA, le CNRS et l'Université de Versailles Saint-Quentin en Yvelines (UVSQ), localisé à l'Orme des Merisiers. Il fait partie de l'Institut Pierre Simon Laplace (IPSL), fédération francilienne de neuf instituts de recherche en climat et environnement. Le LSCE regroupe environ 320 chercheurs, ingénieurs et agents administratifs dont 150 personnels permanents issus des 3 tutelles et une cinquantaine de doctorants. Depuis janvier 2015, le LSCE s'organise en trois thèmes scientifiques : i) Archives et Traceurs ii) Cycles Biogéochimiques et Transferts dans l'Environnement iii) Climat et Cycles - Modélisation de leurs variabilités et de leurs interactions. Chacun de ces thèmes regroupe entre 4 et 7 équipes de recherche constituées autour d'outils et/ou sujets de recherche communs. Le LSCE s'appuie également sur trois plateformes : PANOPLY pour la géochimie analytique (partagée avec le laboratoire GEOPS), ICOS (pour la surveillance des gaz à effet de serre), et la plateforme de modélisation du système Terre (pilotée par l'IPSL). L'activité scientifique est facilitée grâce aux trois équipes support (Administration/Gestion, Informatique, Sécurité/Infrastructure).

Description du poste

Domaine

Sciences du climat et de l'environnement

Contrat

Post-doctorat

Intitulé de l'offre

Interpretation of diurnal and synoptic variabilities of atmospheric CO2 in Paris region H/F

Statut du poste

Cadre

Durée du contrat (en mois)

24

Description de l'offre

The LSCE and SUEZ are looking for a motivated postdoc / young scientist or engineer for a joint project focused on the interpretation of the atmospheric CO2  measurements in Paris region with the aim to discriminate the relative role of atmospheric dispersion and surface emissions.

Cities are essential partners for the implementation of future strategies aiming to drastically reduce CO2 emissions. In fact, nearly 3/4 of anthropogenic CO2 emissions are linked to city activities, and projections show that cities could add over two billion people this century with global urban area tripling by 2030. Despite this, there are still significant uncertainties about the intensity of emissions on a city scale, and there is no reliable and independent method for verifying the effectiveness of the reduction policies put in place. The implementation of such verification methods is essential, and the main lines of research are based on the joint use of emission inventories based on statistical data, of measurement of atmospheric concentrations of CO2 and other tracers, and models of atmospheric dispersion making it possible to make the link between emission zones and measurement sites. The city of Paris is one of the most advanced in the deployment of pilot observation systems to assess the effectiveness of such methods. Several instruments deployed in and around Paris by LSCE and SUEZ already monitor CO2 concentrations. This system will be densified in the coming months as part of national and European research projects, which will provide an unprecedented amount of information on a megacity scale. The purpose of this joint position between LSCE and SUEZ is to develop the analysis methods allowing an optimal use of the measured atmospheric signals.

 The goal of this project is to optimize the use of CO2 measurements carried out in the Ile de France region both by very precise analyzers operated by LSCE, and mid-cost analyzers deployed by SUEZ since 2020. The observational network is analyzed in atmospheric inversion approaches, but some of the measurements are not used yet, as atmospheric transport models have poor performances during weak dispersion condition (at night or when the wind is low) that correspond to the strongest accumulations of CO2 in the atmosphere. The study will therefore focus on the interpretation of all the CO2 measurements, in order to characterize the signals observed, their correlations with other atmospheric tracers characteristic of sectors of activity (NOX, CO, VOC, etc. ), or indicators of the atmospheric dispersion (met observations, Radon, boundary layer height). The objective will be to determine to what extent the accumulations of CO2 observed above the Parisian agglomeration can provide information on the intensity of surface emissions. The research will be performed at LSCE in a team gathering modelers and experimentalists with a strong expertise in high precision greenhouse gas measurements.

Profil du candidat

Requirements :

• Experience in carbon cycle, atmospheric or related science discipline

• Knowledge in the field of atmospheric dispersion in urban areas  would be appreciated

• Competence in one or more scientific programming languages

Selection Criteria :

PhD or MSc in a field such as atmospheric sciences, meteorology, environment.

Autonomy, ability to work in a team and time management skills.

Experienced in multidisciplinary team-based activities with the ability to effectively communicate with colleagues and with staff from the partners of a project.

Salary: Competitive salary with full social and health benefits accorgins CEA salary grid, commensurate with work experience.

How to apply: Applicants should submit a complete application package by email. The application package should include (1) a 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 addresses of at least two references

Contact

Michel.ramonet@lsce.ipsl.fr and herve.utard@suez.com

https://www.lsce.ipsl.fr

Localisation du poste

Site

Saclay

Localisation du poste

France, Ile-de-France, Essonne (91)

Ville

Gif-sur-Yvette

Demandeur

Disponibilité du poste

01/11/2021