December 2014
Message 54

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[Met-jobs] 2 PhD positions in Meteorology at the University of Cologne, Germany

From Sarah Henkel <>
Date Thu, 11 Dec 2014 14:03:01 +0100

The Institute for Geophysics and Meteorology, University of Cologne (IGMK), Germany,
invites application for several Research Assistant positions with the opportunity for graduation

(1) Identification of patterns in long-term observations of the cloudy boundary layer
(2) The impact of regional-surface heterogeneity on boundary-layer cloud fields

The topics are closely related to the Juelich ObservatorY for Cloud Evolution (JOYCE) where various ground-based remote sensors are operated and combined with model simulations. The positions are related to the Energy Transition and Climate Change (ET-CC) initiative within the University of Cologne, which was re-cently awarded to IGMK, and in which meteorology is linked to renewable energy economics, and the Hans-Ertel Centre for Weather Research (HErZ)- Retrospective Analysis of Regional Climate.

The positions (75% TV‐L E13) are awarded for at least 3 years. We offer a productive and interdisciplinary working atmosphere including comprehensive supervision and integration into the Graduate School of Geosci-ences (GSGS; Details on the individual projects are given below.

We expect strong interest in atmospheric science with specialization in cloud modeling and observations, re-mote sensing, or statistical modeling, depending on the topic. Applicants should have a Master-of-Science-equivalent university degree in meteorology, geophysics, physics or mathematics. Experience in scientific pro-gramming, preferably in a UNIX/LINUX environment, and knowledge in computational modelling is highly desir-able.

Interested candidates should send a CV; a cover letter describing background, training and research interests; certificates; and other usual documents as a single PDF to gsgs-jobs@uni-€ Please clearly indicate which position(s) you apply for. Review of applications will begin immediately and continue until the positions have been filled, December 30 latest.

The University of Cologne is an equal opportunity employer in compliance with the German disability laws. Women and persons with disabilities with equal capability, suitability and professional experience are favored and strongly encouraged to apply.

The selection for the positions will be based solely on merit without regard to gender, religion, national origin, political affiliation, marital or family status or other differences. Among equally qualified candidates, handi-capped candidates will be given preference.

Detailed project descriptions
(1) Identification of patterns in long-term observations of the cloudy boundary layer
Since 2010 continuous measurements by various remote sensing instruments (microwave radiometer, cloud radar, ceilometer, wind lidar, infrared spectrometer etc.) are performed at the Jülich ObservatorY for Cloud Evolution (JOYCE, as part of Collaborative Research Center TR32 ( The resulting data, including routine scanning by radar/ceilometer, will serve as a basis for analysing the spatio-temporal characteristics of cloud appearance and boundary layer-development. In cooperation with collaboration partners from TR32, the successful candidate will investigate how identified patterns can be linked to land surface characteristics. Special focus will be on the role of vegetation, and the candidate will support the research group Ecosystem Dynamics ( at the Research Center Jülich to model surface fluxes and their spatio-temporal distribution using cloud observations and radiative transfer modelling. For more information contact Prof. Dr. S. Crewell (crewell(at)

(2) The impact of regional-scale surface heteorogeneity on boundary-layer cloud fields
Regional fields of state variables such as temperature, humidity and momentum in the lowest few kilometers of the atmosphere are typically highly heterogeneous in space, and show strong fluctuations in time. This variability is associated with the turbulent processes in the daytime Convective Boundary Layer (CBL). How exactly surface heterogeneity contributes to variability in the CBL, and the associated cumulus cloud fields, is not fully understood yet. The successful candidate will address this question by means of high-resolution, cumulus cloud resolving simulations on regional domains. The purpose is to disentangle and quantify the various contributions to boundary-layer cloud variability by internal boundary-layer processes on the one hand, and terrain and surface heterogeneity on the other. Model results will be compared to in-situ measurements at the JOYCE site ( and remote-sensing satellite measurements in terms of cloud population statistics. New insights will be represented in scale-adaptive parametrizations of cloudy boundary-layers for use in future high-resolution weather prediction models. For more information contact Prof. Dr. Roel A.J. Neggers (neggers(at)
University of Cologne
Institute for Geophysics and Meteorology

Pohligstr. 3, D-50939 Cologne

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