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Postdoc position (B8)

Role of uncertainty in ice microphysical processes in warm conveyor belts for upper-tropospheric flow

This Postdoc position contributes to project B8 "Role of uncertainty in ice microphysical processes in warm conveyor belts".

Primary supervisors: Prof. Dr. Corinna Hoose and Dr. Christian Grams
Other project leader: Dr. Annette Miltenberger

The "Cloud Physics" and "Large-scale Dynamics and Predictability" groups at the Institute of Meteorology and Climate Research (IMK-TRO), Karlsruhe Institute of Technology (KIT), offer a joint postdoc position within Phase 2 of the collaborative research center "Waves to Weather" (W2W). KIT is a distinguished research university that combines three core tasks — research, education and innovation — into a single mission. With 9,400 employees and 25,000 students, it is one of the largest institutions of research and higher education in natural sciences and engineering in Europe. . In the last Shanghai Ranking, KIT was ranked #1 in Germany and #6 in Europe in the Academic Subject of
Atmospheric Science.

Latent heat release due to cloud processes in the warm sector of an extratropical cyclone is embedded into a rapidly ascending air stream – the warm conveyor belt (WCB). WCBs transport air cross-isentropically from low levels to the tropopause over a horizontal distance of several thousands of kilometres within about 2 days. This injection of air into the upper troposphere has a significant impact on the large scale and affects the life cycle of blocking anticyclones. However, there is significant uncertainty about the role of microphysical processes in WCBs and how they affect the intensity of WCB outflow. This project addresses the impact of cloud microphysical processes in the extratropics
across multiple scales ranging from cloud particles to the large-scale circulation with a specific focus on ice formation and phase partitioning. The successful candidate will develop an innovative diagnostic framework to quantify the relative contributions of microphysical processes on latent heating in WCBs and their effects on WCB evolution and intensity. Therefore a large ensemble will be simulated with the ICON-numerical weather prediction model and used to scan the phase space of environmental conditions and cloud microphysical parameters for sensitivities of WCB properties. Furthermore, the microphysical latent heating contributions will be analysed from a Lagrangian perspective in collaboration with Dr. Annette Miltenberger at JGU Mainz. Finally the feedback on the large-scale upper-tropospheric circulation will be quantified.

We are looking for an enthusiastic candidate, holding a PhD in Meteorology, Physics, or a related field, with a background in atmospheric dynamics or cloud physics, demonstrated ability to work independently and significant experience in numerical modeling. A high level of English is required, and experience with Fortran, Unix, and statistics/visualisation software would be an advantage.

The position is funded until June 2023. The successful candidate will be remunerated according to TV-L 13 (100%) and should start as soon as possible. Applicants are asked to specify their desired starting date and to give the contact details of two academic referees.

W2W features an innovative program for the development of early career researchers based on self-government. In addition to self-organized activities such as workshops, trainings and a guest program, the successful candidate will have the opportunity, if desired, to pursue an international research visit of at least one week. The consortium conducts an ambitious program to gradually enhance gender equality on all career levels within the academic fields combined in W2W.

KIT actively supports equality, diversity and inclusion, and as an equal opportunity employer, KIT explicitly encourages applications from women as well as from all others who will bring additional diversity to the university’s research and teaching. KIT provides support for families. Applicants with disabilities will be preferentially considered if suitably qualified.

If you are interested, please apply online here!


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