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Portal > Offres > Offre UMR7583-GENTUA-013 - chercheur(H/F) sur la formation d'AOS à partir d'émissions automobiles

postdoctoral position for Investigation of SOA and ozone formation from vehicules emission

This offer is available in the following languages:
Français - Anglais

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General information

Reference : UMR7583-GENTUA-013
Workplace : CRETEIL
Date of publication : Monday, September 30, 2019
Type of Contract : FTC Scientist
Contract Period : 36 months
Expected date of employment : 18 November 2019
Proportion of work : Full time
Remuneration : between 2695 and 3841 euros monthly gross according to experience
Desired level of education : PhD
Experience required : Indifferent

Missions

The successfull candidate will study the atmospheric aging of car emissions in simulation chamber. In particularly, experiments will be carried out in the CESAM simulation chamber (http://www.cesam.cnrs.fr/). This project will combine emissions measurements of primary pollutants (both in gas and particle phase) and the investigation of the atmospheric aging of such pollutants, their potential to form ozone and secondary organic aerosol (SOA).

Activities

The successful candidate will study the atmospheric aging of car emissions. He will participate in the implementation of experiments and mass spectrometry instruments, he will perform 70 days of experiments on the CESAM chamber simulation and also he will perform the analysis and the validation of data. At the end of each series of experiments, a report containing the data provided, formatted and analyzed will be made. This notably involves instrument measurements: in particular the evolution of particles (particle size, number, mass, composition) and ozone in CESAM, and the primary emissions at the exhaust (particle and VOC) pre-dilution or specific dilution). The evolution of the chemical composition of the particles obtained via the ACSM is essential for the understanding of the SOA formation.

Skills

The candidate should have a PhD in Atmospheric Science. Good knowledge in atmospheric chemistry, analytical techniques (mass spectrometry PTR-TOF-MS, ACSM-TOF) is appreciated.
Candidates must have a good capability to communicate in English and a knowledge of French would also be appreciated.

Work Context

With more than 1.6 billion vehicles worldwide, car emissions have significantly reached concentrations of air pollutants in particular, including airborne particles (PM2.5), soot, metals, NOx and ozone. Legislative authorities have imposed stringent emission limits on nitrogen oxides and particulate matter, in addition to requiring a reduction in CO2 emissions. In response, car manufacturers have made in-engine modifications and introduced exhaust after-treatment technologies.
Indeed, air pollution is very often associated with pollutants directly emitted into the atmosphere and anti-pollution standards regulate primary emission levels. However, the impact on secondary issues is not yet regulated to limit the automobile impact on SOA formation.
In this context, a collaboration has been made between the GSM and LISA to study the formation of ozone and SOA from the car emissions.

Additional Information

LISA (Laboratoire Interuniversitaire des Systèmes Atmosphériques), UMR CNRS 7583 is a mixed research laboratory between Paris-Est Créteil University (UPEC), Université de Paris (UP) and CNRS. It is a component of the Observatory of Sciences of the Universe EFLUVE and of Institut Pierre Simon Laplace (IPSL), a Federation of 6 research laboratories working on environment and climate in the Paris region.
The main research themes in LISA relate to the understanding of the functioning of terrestrial and planetary atmospheres and of the impacts related to the changes of the atmospheric composition due to human activities. The methods used are based on direct observations in the atmosphere, on experimental simulations performed in the laboratory and on various numerical modeling approaches

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