Reutter, Philipp, Dr.

ETH Zürich Dr. Philipp Reutter Institut f. Atmosphäre und Klima CHN O 16.2 Universitätstrasse 16 8092 Zürich Phone: +41 44 632 73 15 E-Mail:

PostDoc in the group Atmospheric Physics, headed by Prof. Ulrike Lohmann

Lecture on Cloud Dynamics: Hurricanes

Research interests

• Aerosol-cloud interactions
  A crucial factor for the dynamical and microphysical evolution of clouds is the activation of aerosol particles as cloud condensation nuclei (CCN). Enhancing the number of aerosol particles that can serve as CCN generally leads to more and smaller cloud droplets at cloud base, which effects the following evolution of a cloud.
• Mixed-phase clouds
  Studying the effect of changing aerosol properties through cloud processing (e.g. coating with sulfate) on mixed-phase clouds. This process changes the ability of aerosol particles to act as ice nuclei (IN) for contact and immersion freezing.
• Pyro-convective clouds
  Pyro-convection, i.e., deep convective clouds that form above wildfires, is one of the most extreme forms of atmo- spheric deep convection. Observational and modeling studies have shown the extraordinary dynamical and microphysical properties of deep pyro-clouds

Below you can find a pyro-convective cloud calculated with the Active Trace High resolution Atmospheric Model (ATHAM). You can find more information of my PhD-Thesis following this link.
A real world example of the aerosol-cloud interaction within a pyro-convective cloud can be seen in this video on youtube.

3D model output (ATHAM) of a pyro-convective cloud with (white) the 0.1 g/kg iso-surface of the hydrometeor content without rain, (blue) the 0.1 g/kg iso-surface of the rain water content and (red) the 25 °C iso-surface of the temperature indicating the location of the fire.

Publications

Peer reviewed

• Reutter, P., Su, H., Trentmann, J., Simmel, M., Rose, D., Gunthe, S. S., Wernli, H., Andreae, M. O., and Pöschl, U.: Aerosol- and updraft-limited regimes of cloud droplet formation: influence of particle number, size and hygroscopicity on the activation of cloud condensation nuclei (CCN), Atmos. Chem. Phys., 9, 7067-7080, 2009.

Conferences and Workshop Contributions

• P. Reutter and U. Lohmann: Aerosol-Wechselwirkungen in ECHAM5, DACH Tagung, September 2010, Bonn, Germany
• P. Reutter, H. Su, J. Trentmann, M. Simmel, D. Rose,S. S. Gunthe, A. Seifert, M. Herzog, H. Wernli, M. O. Andreae, U Pöschl: Parcel model and cloud resolving three-dimensional simulations of pyro-convective clouds: from CCN activation to precipitation, AMS Conference on Cloud Physics, July 2010, Portland, USA.
• P. Reutter: Numerische Simulation von mikrophysikalischen Prozessen in pyro-konvektiven Wolken, invited talk, October 2009, Forschungszentrum Jülich
• P. Reutter, J. Trentmann, H. Su, M. Simmel, A. Seifert, M. Herzog, D. Rose, H. Wernli, M. O. Andreae, U. Pöschl: Parcel model and three-dimensional simulations of pyro-convective clouds: from CCN activation to precipitation, MOCA Joint Assembly, July 2009, Montreal, Canada, [Abstract]
• H. Su, P. Reutter, J. Trentmann, D. Rose, S. Gunthe, M. Simmel, A. Nowak, P. Achtert, A. Wiedensohler, M. Hu, M. Shao, T. Zhu, Y. H. Zhang, U. Pöschl: Cloud parcel modelling of CCN activation in megacity air based on observations from Beijing and Guangzhou, General Assembly of the European Geosciences Union (EGU), April 2009, Vienna, Austria, [Abstract]
• P. Reutter, J. Trentmann, M. Simmel, H. Wernli, M. O. Andreae, U. Pöschl: Numerical simulations of microphysical processes in pyro-convective clouds: Activation of aerosol particles as cloud condensation nuclei, WMO International Cloud Modeling Workshop, July 2008, Cozumel, Mexiko, [Abstract]
• P. Reutter, J. Trentmann, M. Simmel, H. Wernli, M. O. Andreae, U. Pöschl: Numerical simulations of microphysical processes in pyro-convective clouds: Activation of aerosol particles as cloud condensation nuclei, International Conference on Clouds and Precipitation (ICCP), July 2008, Cancun, Mexiko, [Extended Abstract]
• S. Gunthe, D. Rose, E. Mikhailov, P. Reutter, J. Trentmann, M. Simmel, M. O. Andreae, U. Pöschl: Activation of aerosol particles with complex chemical composition as cloud condensation nuclei (CCN) in laboratory experiments, field measurements and model simulations, General Assembly of the European Geosciences Union (EGU), April 2008, Vieanna, Austria, EGU2008-A-09558, [Abstract]
• P. Reutter, J. Trentmann, G. Luderer, M. Simmel, M. Herzog, H. Wernli, U. Pöschl, M. O. Andreae: Numerische Simulationen von mikrophysikalischen Prozessen in pyro-konvektiven Wolken. DACH Meteorologentagung, September 2007, Hamburg, Germany, [Abstract]
• P. Reutter, J. Trentmann, G. Luderer, M. Simmel, C. Textor, M. Herzog, H. Wernli, U. Pöschl, M. O. Andreae: Numerical Simulations of microphysical processes in pyro-convective clouds, IUGG XXIV General Assmebly, July 2007, Perugia, Italy. [Abstract]
• P. Reutter, J. Trentmann, G. Luderer, M. Simmel, C. Textor, M. Herzog, H. Wernli, U. Pöschl, M. O. Andreae: Numerical simulations of microphysical processes in pyro-convective clouds, General Assembly of the European Geosciences Union (EGU), April 2007, Vienna, Austria, EGU2007-A-03495. [Abstract]

Other

• Reutter, P., 2009, Numerical simulations of microphysical processes in pyro-convective clouds. PhD thesis, Max Planck Institut for Chemistry, Mainz and University of Mainz
• Reutter, P., 2006. Austausch zwischen Stratosphäre und Troposphäre in der Umgebung von Zyklonen, Diploma Thesis, University of Mainz

• private homepage: zimmo.org