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Advertising division: IEK-7 - Stratosphere
Reference number: 2017-225


The Institute for Energy and Climate Research, Stratosphere (IEK-7), studies chemical, microphysical and dynamical processes in the upper troposphere and stratosphere and the role they play in the climate system. We are seeking a new Ph.D. student in the ''Theory'' group to develop a Lagrangian transport module for the new German atmospheric model ICON. The Ph.D. project is part of the large project of the German Helmholtz Association “Advanced Earth System Modelling (ESM) capacity”. The focus of ESM is to develop and apply a world-leading Earth system modeling infrastructure. The Ph.D. work will be performed within a three-year program of the Graduate School HITEC.

We are looking to recruit a

PhD student “Developing and applying a Lagrangian transport module for the new German atmospheric model ICON”

Your Job:

The group at IEK-7 has a long-standing tradition in developing and applying Lagrangian transport modules, in particularly the Chemical Lagrangian Model of the Stratosphere (CLaMS). These transport modules have recently been integrated in the Chemistry climate model EMAC using the Messy coupler. Using Lagrangian transport has distinct advantages for simulations in atmospheric regions where strong tracer gradient occur, e.g. in the atmospheric jet regions and in the vicinity of the tropopause. The improved transport of trace gases (e.g, water vapor) is expected to have an important impact on model results including results on climate change.

The Ph.D. candidate will deal with the coupling of the ICON model (available from external groups) with the Lagrangian transport, which is developed, maintained and employed
at IEK-7. In a first step, the coupled version of the ICON model with Lagrangian transport will have to be developed. The first tests will demonstrate the differences and advantages of the Lagrangian transport compared to the classic Eulerian transport in ICON. Finally, scientific studies of transport in the upper troposphere, lower stratosphere, based on the newly developed model, will be conducted.

Your Profile:

  • Master degree in physics, chemistry, atmospheric sciences or a related field (e.g. computer science) with good final grade (German system equivalent 2.0 or better)
  • Very good numerical and programming skills are essential; knowledge of Fortran is an advantage.
  • Experience in scientific computing on high performance computers
  • Experience with tools like Python and IDL and with the Linux environment is of advantage

Our Offer:

  • International, interdisciplinary working environment on an attractive research campus, ideally situated between the cities of Cologne, Düsseldorf, and Aachen
  • Excellent technical facilities
  • Excellent Super computing facilities at the Jülich supercomputing centre (JSC)
  • Opportunities of being part of the national and international scientific community
  • Broad spectrum of training in the Graduate School HITEC ( and the Forschungszentrum
  • Flexible working hours and various opportunities to reconcile work and family life
  • Limited for 3 years
  • 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 (50%) 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.