Microphysics of ice clouds Workshop

Vienna; Austria
11th and 12th of April 2015

We will bring together three communities of atmospheric ice research: field measurements, laboratory studies and modellers. The joint topic is the ice nucleation in clouds. We will focus on recent observations, and open questions concerning ice formation and development in the atmosphere discussing experimental and theoretical methods including chemistry and microphysics. A particular focus will be on heterogeneous ice nucleation.

Scientific Summary

The development of a detailed understanding of ice clouds in the atmosphere relies on the combined use of field studies, modelling at a multitude of scales, and laboratory studies that provide the necessary fundamentals. Atmospheric ice is studied by remote sensing methods from the ground, from airplanes and satellites, or in situ from airborne platforms such as aircraft and balloons. While such observations are essential, the various methods often lack sufficient access to fundamental physic-chemical parameters of ice particles and the involved nucleation process. On the other hand, laboratory studies are usually aimed at understanding the fundamentals of the underlying processes such as the details of the nucleation process, because they can be performed under well controlled conditions. Hence, under these controlled conditions the impact of individual parameters on the ice formation process can be determined. Theoretical and numerical models are then required to transfer the knowledge of laboratory and field studies into small and large-scale models using sensible parameterizations. Moreover, the influence and impact of the nature of pre-existing aerosol particles on ice nucleation efficiency, ice microstructure and ice cloud dynamics are one of the least understood parameters in cloud microphysics. The knowledge of chemists, biologists and crystallographers about the aerosol composition has to be combined with the ice dynamic models of physicists, meteorologists and computational modellers to gain a better understanding of the whole process. For these reasons it seems viable for progress in this area to bring together scientists from various (sub-) disciplines and foster discussions between them.
Given the importance of understanding the atmospheric ice nucleation process for various atmospheric applications, e.g. the modelling precipitation and for a representation of clouds in climate models, we believe the topic of the workshop “Microphysics of Ice Clouds” is of high scientific interest for scientists from various disciplines such as meteorology, chemistry, physics, and biology. A workshop provides an ideal platform for more detailed and, thus, deeper interaction between the different communities and provides the opportunity to bring together scientists from the different fields of ice research. Moreover, in contrast to a regular session at the EGU General Assembly with a rapid sequence of contributed talks (typically 12min + 3min of questions), the workshop will provide more time for discussion. This may help abolishing uncertainties and prejudices existing between scientists from different disciplines, in particular for PhD students and postdocs who represent the next generation of scientists. Particularly for those younger scientists support will be offered. For 20 invited speakers we will cover accommodation costs at the Motel One, which is a good value hotel. For 4-5 PhD students a travel support will be available. During the workshop all meals and beverages will be for free. The good value catering will be offered by the Lower Austrian Restaurant Siebenschläfer, who was also organising the meals during the former workshops.

Abstract deadline until 6th of March 2015
Abstract Submission a.o. Univ.Prof. Dr. Hinrich Grothe
Vienna University of Technology, Institute of Materials Chemistry