January 2013
Message 67

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[Met-jobs] PhD position in cloud ice microphysics at KIT, Germany

From Corinna Hoose <>
Date Mon, 21 Jan 2013 20:01:55 +0100

At the Karlsruhe Institute of Technology, Institute for Meteorology and Climate Research, a PhD position in the field of cloud ice microphysics is available. Details are appended below and can also be found at and Please contact me with any questions. 

Corinna Hoose

PhD position in cloud ice microphysics

Within the Helmholtz Climate Initiative REKLIM (, we are offering a position for a PhD student to work on one of two possible topics. Both suggestions are exciting combinations of numerical modelling and analysis of measured data, with the possibility to take part in further lab/field campaigns to complement the existing measurements.

Topic 1: Simulation and in-situ measurements of Arctic clouds
Supervisors: Martin Schnaiter ( and Corinna Hoose (

Arctic clouds, which often contain both liquid droplets and ice crystals, are not well represented in weather and climate models. Here we will use in-situ measurements with the Small Ice Detector (SID) and other instruments, operated during VERDI (, an aircraft campaign in the Canadian Arctic, to evaluate and improve microphysical parameters in high-resolution simulations with the model COSMO.
Tasks: Model setup for semi-idealized case studies based on observations, implementation of the necessary changes in the model code, analysis of microphysics measurements from a previous field campaign, participation in a second field campaign in 2014 and operation of SID, comparison of observed and simulated cloud variables, quantification of spatial variability in observations and simulations, improvement of the representation of the radiative properties of mixed-phase Arctic clouds in the model. 

Topic 2: Developing a comprehensive AIDA-based parameterization framework for heterogeneous ice nucleation
Supervisors: Ottmar Möhler ( and Corinna Hoose (

Over the last 10 years, numerous experiments for heterogeneous ice nucleation with various types of aerosol particles have been conducted in the cloud chamber AIDA (Aerosol Interactions and Dynamics in the Atmosphere). In this project, these data will be used to derive a consistent ice nucleation parameterization covering all atmospherically relevant particles and temperature/humidity conditions. This parameterization will then be applied to simulated aerosol fields in order to calculate regional or global ice nuclei climatologies.  
Tasks: Compilation, processing and analysis of relevant existing AIDA measurements, if necessary conduction of further AIDA experiments to fill data gaps, selecting suitable analytical functions to parameterize these data,  implementation into a regional or global atmospheric model, model simulations, comparison of projected IN concentrations with field measurements.

Required qualifications for both topics:

•	MSc/Diplom or equivalent degree with above-average grades in physics, meteorology or a related subject
•	Excellent analytical skills and scientific thinking 
•	Strong motivation to combine modelling and experimental work
•	Good programming skills (ideally IDL/MATLAB or similar, Fortran, Unix/linux shell scripts)
•	Fluency in oral and written English
•	Previous experience in atmospheric modelling, data analysis, aerosol science and/or cloud physics would be an asset.

We are looking for a highly motivated, independent student. We offer a dynamic work environment at one of Germany's foremost research institutions for natural science and technology with attractive programs for PhD students (, and payment according to TV-L 13 (75%) for 3 years. The starting date is negotiable.

Please submit your application as one pdf file, in German or English, including a cover letter indicating the preferred starting date and the preferred topic (1 or 2), curriculum vitae, copies of relevant certificates, and contact details of 2 referees to Prof. Dr. Corinna Hoose (, Prof. Dr. Thomas Leisner ( and Dr. Martin Schnaiter ( or Dr. Ottmar Möhler ( Review of applications will begin immediately and continue until the position is filled.

Corinna Hoose, Dr. sc. ETH
Professor of Theoretical Meteorology
Helmholtz Young Investigators Group Leader

Karlsruhe Institute of Technology (KIT)
Institute for Meteorology and Climate Research
Troposphere Research (IMK-TRO) and
Atmospheric Aerosol Research Department (IMK-AAF)
Hermann-von-Helmholtz-Platz 1
D - 76344 Eggenstein-Leopoldshafen

Phone: +49 721 608-23249 or -43587
Fax: +49 721 608-24332

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