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Advertising division: IEK-8 - Troposphere
Reference number: 2018-239


The Institute for Energy and Climate Research, Troposphere (IEK-8), investigates the chemical and physical processes in the troposphere that impact the chemical composition of the atmosphere. We are seeking for a postdoc (physics, chemistry, environmental sciences) for two years.

We are looking to recruit a

Postdoc "Setup of a continuously stirred flow reactor: a tool for studying atmospheric secondary organic aerosol processes"

Your Job:

The atmospheric oxidation of organic compounds contributes to formation secondary gaseous pollutants and to formation of secondary aerosols. We will investigate in how far the recently discovered group of highly oxygenated organic molecules possibly dominates the atmospheric secondary organic aerosol formation. Highly oxygenated organic molecules are formed fast in the gas phase by multiple intramolecular rearrangements in organic radicals. For such formation/partitioning studies temperature controlled, continuously stirred flow reactors equipped with chemical ionization mass spectrometers have proven to be extremely useful (Ehn et al. Nature, 2014).

The first part of your work you will focus on rebuilding and to improving our continuous stirred flow reactor (Jülich Plant Atmosphere Chamber), with features of flexible quantitatively controlled sources for organic compounds, carefully controlled inflow/outflow of gases and aerosols for detailed mass balances, and innovative light source management for control of oxidant levels and selection of different pathways within the oxidation cycle of organic compounds. In the second phase you will investigate of the atmospheric oxidation of organic compounds, integrating i) detailed characterization of oxygenated and highly oxygenated organic molecules in the gas-phase by CIMS, ii) determination of their vapour pressures and partitioning into the particulate phase. Here we want to focus on the development of an in-situ method. Results will be compared to ex-situ TAG-AMS and FIGAERO-CIMS. The planning and execution of experiments require a high level of teamwork, because the interpretation of the complex chemical processes is only possible by involving other accompanying measurements.

Your Profile:

  • PhD degree in physics, chemistry, environmental sciences or a related field
  • Knowledge about mass spectrometry and physical or analytical chemistry is advantageous
  • Interest in process modelling is welcome
  • Good skills in the spoken and written English language

Our Offer:

  • International, interdisciplinary working environment on an attractive research campus, ideally situated between the cities of Cologne, Düsseldorf, and Aachen
  • Excellent technical facilities
  • Broad spectrum of international contacts and collaborations
  • A comprehensive further training programme
  • Flexible working hours and various opportunities to reconcile work and family life
  • Limited for 2 years
  • Full-time position with the option of slightly reduced working hours
  • Salary and social benefits in conformity with the provisions of the Collective Agreement for the Civil Service (TVöD). Depending on the applicant's qualifications and the precise nature of the tasks, salary grade 13 TVöD-Bund

Forschungszentrum Jülich aims to employ more women in this area and therefore particularly welcomes applications from women.

We also welcome applications from disabled persons.

Additional Information

We look forward to receiving your application, preferably online via our online recruitment system on our career site until 15.09.2018, quoting the above-mentioned reference number.

Anja Schurf
Telefon: +49 2461 61 9700







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