January 2020
Message 39

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[Met-jobs] Two PhD positions on Arctic Amplification at the University of Cologne (Germany)

From Vera Schemann <>
Date Wed, 8 Jan 2020 14:02:36 +0100

The Institute for Geophysics and Meteorology, University of Cologne (Germany), invites applications for two PhD positions within the Collaborative Research Center TR172 Arctic Amplification (AC)^3 (, whose second phase has started in January 2020.  The two PhD candidates will work closely together on the topic of mixed-phase clouds under arctic conditions.

Topic 1: Observational ice process fingerprints of Arctic mixed-phase clouds (wiss2001-03)

Topic 2: Assessment of mixed-phase clouds by high-resolution modelling (wiss2001-04)

For more information on the topic see description below,, or the official announcements (attached to this email). 

Please send your application following the guidelines in the official job posting and your questions regarding topic 1 to Dr. Stefan Kneifel ( and regarding topic 2 to Dr. Vera Schemann ( until 31. January 2020.


Topic 1: Observational ice process fingerprints of Arctic mixed-phase clouds

During Phase I of AC³, a W-Band cloud radar has been installed at the German/French research site in Ny-Ålesund/Svalbard and has collected a first long-term dataset of Arctic MPC. During the second phase, this radar will be complemented by a new polarimetric Ka-Band cloud radar. The successful candidate will apply an existing radar forward operator to a multi-month dataset of high-resolution simulations of MPC. These synthetic observations will be used to statistically assess model-observation biases for MPC. The candidate will also help to install and configure the new radar at Ny-Ålesund for long-term but also campaign operations. The candidate will apply polarimetric particle shape retrievals, dual-wavelength radar techniques, as well as polarimetric radar forward operators to those new datasets in order to derive additional constraints for microphysical process simulations. These new observations will be the basis to better understand the observed statistical biases and to achieve consistency between improved high-resolution ICON simulation performed in the partner PhD project (PHD-2) and the observed microphysical process signatures.

Topic 2: Assessment of mixed-phase clouds by high-resolution modelling

During Phase 1 of AC³, the new ICON Large-Eddy-Model has been tested for high-resolution simulations around Ny-Ålesund/Svalbard under arctic conditions. During the second phase, the model and its setup will be consolidated and explored. The successful candidate will for the first time perform long-term simulations around Ny-Ålesund in order to create a statistical basis for the comparison with the advanced measurements taken in the partner PhD project (PHD-1). Besides the long-term simulations, also several sensitivity studies will be performed to investigate the influence of the setup and the forcing conditions like the representation of the surface. Based on the different sets of simulations and the unique combination with the measurements new insights in the representation of the microphysical properties of arctic mixed phase clouds in the applied parameterizations can be derived. Within this project, these new ideas will be implemented and tested in the ICON-LEM framework with the aim to improve the parameterizations and advice the coarser climate and weather prediction models.


Your profile:
  • Master‘s Degree in Meteorology, Geosciences, Physics or closely related field
  • Highly motivated person with high interest in Artic clouds, cloud ice microphysical processes
  • Experience in scientific programming and analysis of observation datasets
  • Very good communication skills in written and spoken English as well as ability to work in a team as well as independently
We offer you:
  • Exciting research project, being part of an international team
  • a diverse and fair working environment
  • support in reconciling work and family life
  • flexible working time models
  • extensive advanced training opportunities
  • occupational health management offers
  • local transport ticket at a discount for UoC employees
General information:

The positions are available from now on a part-time basis (25,88 hours/week). It is limited to 3 years (possible extension by up to 1 year). If the applicant meets the relevant wage requirements and personal qualifications, the salary is based on remuneration group 13 TV-L of the pay scale for the German public sector.

The University of Cologne is committed to equal opportuni-ties and diversity. Women are expressly encouraged to apply and given priority in accordance with the Equal Opportuni-ties Act of North Rhine-Westphalia (Landesgleichstellungs-gesetz – LGG NRW). We also expressly welcome applications from people with special needs or of equal status.


Best regards,
Stefan Kneifel and Vera Schemann

Attachment: wiss2001-03_phd-a-de-en.pdf
Description: Adobe PDF document

Attachment: wiss2001-04_phd_c-de-en.pdf
Description: Adobe PDF document

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