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Interpretation of diurnal and synoptic variabilities of atmospheric CO2 in Paris region

ABG-99406 Job Any
2021-07-22 Fixed-term 24 Month Salaire à négocier
Laboratoire des Sciences du Climat et de l'Environnement
gif-sur-yvette - Ile-de-France - France
Chemistry
  • Physics
  • Earth, universe, space sciences
Research and Development

Employer

LSCE is a world-class research laboratory established and a collaboration between CEA, CNRS and the University of Versailles Saint-Quentin (UVSQ). It is part of the Institute Pierre Simon Laplace (IPSL). LSCE hosts approximately 300 researchers, engineers and administrative staff including many PhD and master’s students.

Position and assignments

The Laboratoire des Sciences du Climat et de l’Environnement (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.

 

Background

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.

 

Overall Goals

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.

What SUEZ and the LSCE can offer you

LSCE is a world-class research laboratory established and a collaboration between CEA, CNRS and the University of Versailles Saint-Quentin (UVSQ). It is part of the Institute Pierre Simon Laplace (IPSL). LSCE hosts approximately 300 researchers, engineers and administrative staff including many PhD and master’s students. This project will provide the employee with the opportunity to work directly on advanced methods with researchers from the LSCE and other institutions. The purpose of this joint position between LSCE and SUEZ is to develop R&D that becomes sustainable and could lead to a permanent position opening at Suez during or after the position duration.

Location: Laboratoire des Science du Climat et de l’Environnement (https://www.lsce.ipsl.fr) located about 20 km from the heart of Paris in the Orme des Merisiers green area.

 

SUEZ draws on the expertise it has been developing since the late 19th century to help people constantly improve their quality of life by protecting their health and supporting economic growth.

We work to provide access to essential environmental services for everyone. We supply high-quality water, suited to every type of use, and ensure the protection of this common good.

We recover wastewater and waste to convert them into new resources.

Faced with demographic growth, climate change, and social and geographical inequalities, people are increasingly exposed to the consequences of the environmental emergency that is affecting our planet.

SUEZ in numbers

  • 5 continents
  • 86 000 employees
  • 17,2 billion € revenue
  • 2,2 bn m3 alternative water produced
  • 7,2 TWh renewable energy produced
  • 9,5 MtCO2 avoided
  • 4,1 Mt of secondary raw materials produced

Contract duration: 24 months

Location: Laboratoire des Science du Climat et de l’Environnement (https://www.lsce.ipsl.fr) located about 20 km from the heart of Paris in the Orme des Merisiers green area.

Starting date: Sep 1st 2021

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

 

Geographic mobility:

National

Starting date

2021-09-01

Profile

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.

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