Postdoctoral Researcher in Atmospheric Chemistry
il y a 2 semaines
As part of its research activities and support to public authorities, the unit ANAE develops analytical procedures for the characterization of various environmental matrices, including air. Its research activities are strongly linked to its implication in the French national air quality monitoring laboratory (LCSQA) and are focused on the study of atmospheric aerosols, including their physicochemical characterization, understanding of their sources, emission and/or formation processes, as well as their impact on air quality and climate.
The knowledge of aerosols in ambient air is essential to assess health and climate impacts of air pollution. Their sources, formation processes, and chemical composition are still poorly known. Biomass burning accounts for a significant part of the primary emissions of fine PM in the ambient air, notably in winter period due to wood combustion used for residential heating purposes. This source also emits large quantities of volatile and semi-volatile organic species leading to the formation, via (photo-)chemical processes, of secondary organic aerosols (SOA) accounting for a substantial part of fine PM concentrations.
In this context, the main objectives of this postdoctoral work are to study and understand the SOA formation processes from residential wood-burning appliance emissions and from typically emitted SOA precursors. To do so, logwood stove emissions or pure precursors will be aged using an oxidant flow reactor under different oxidation conditions, simulating the diurnal and nocturnal atmospheric processes. A detailed physicochemical characterization of the gaseous and particulate phases will be carried out.
The implementation of advanced instrumentation, such as a CI-ToF-MS, combining several ionization modes and aerosol analysis modules, will permit to determine and measure, at a molecular level, volatile and semi-volatile organic substances in real time. This will allow the study of the primary particle emission and secondary formation dynamics from the wood log stove emissions, obtained under conditions as representative as possible of a common use.
Your mission will focus on the following priorities:
- Operate the oxidation flow reactor and the state-of-the-art on-line instrumentation to perform the aging experiments and measure the chemical and physical properties of the gaseous and particulate phases.
- Independently operate these instruments and other instruments in the laboratory and on the INERIS biomass burning facility.
- Validate and analyze the data by these instruments and interpret the results obtained.
- Link physicochemical characterization with toxicological responses.
- Present results at scientific meetings and during international scientific conferences.
PhD recent graduate (less than 3 years) in chemistry, physics, atmospheric sciences, or environmental engineering to which Ineris will be able to provide additional training within the framework of this postdoctoral contract.
You have experience in experimental sciences and data analysis, including:
- Operating instrumentation such as PTR-MS/CI-ToF-MS and/or ACSM/AMS.
- Performing smog chamber or OFR experiments.
- Troubleshooting and resolving problems with instrumentation.
- Coding and analyzing complex data sets using Igor Pro.
In addition, you demonstrate the following abilities:
- Strong experimental and lab/field work interest.
- Autonomy.
- Scientific rigor.
- Adaptability.
- Teamwork.
- Synthesis and writing abilities.
- Dynamism, and stress tolerance.
- Very good written and oral English.
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