Stefanie Augustin-Bauditz

AS Atmospheric Sciences

The 2014 Outstanding Student Poster (OSP) Award is awarded to Stefanie Augustin-Bauditz for the poster/PICO entitled:

The immersion freezing behavior of mixtures of mineral dust and biological substances (Augustin, S.; Schmidt, S.; Appel, O.; Niedermeier, D.; Ebert, M.; Schneider, J.; Voigtländer, J.; Rösch, M.; Stratmann, F.; Wex, F.)

Click here to download the poster/PICO file.

I am a PhD student at the Leibniz Institute for Tropospheric Research (supervisor: Frank Stratmann) in Leipzig. In my PhD work I investigate the heterogeneous ice nucleation behavior of different size selected aerosol particles at the Leipzig Aerosol Cloud Interaction Simulator (LACIS). My objective is to improve the understanding of the heterogeneous ice nucleation processes and to derive parameterizations describing these. The poster discusses the results of immersion freezing experiments with mineral dust particles mixed with biological substances. It is known that biological macromolecules are more efficient ice nuclei than mineral dust particles and thus of great interest. We were able to highlight that a mineral dust particle which contains an ice active biological macromolecule has the same freezing behavior as a single biological macromolecule.

Publication resulting from the award

Augustin-Bauditz, S., Wex, H., Denjean, C., Hartmann, S., Schneider, J., Schmidt, S., Ebert, M., and Stratmann, F.: Laboratory-generated mixtures of mineral dust particles with biological substances: characterization of the particle mixing state and immersion freezing behavior, Atmos. Chem. Phys., 16, 5531–5543, https://doi.org/10.5194/acp-16-5531-2016, 2016.