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Max-Planck-Institute for Dynamics and Self-Organization
Max Planck Institute for Solar System Research

 

Anemometer

Max-Planck-Institute for Dynamics and Self-Organization

Clouds play an essential role in the water and energy cycles on earth. Our understanding of clouds is so limited that it is the cause of major uncertainty in atmospheric circulation models and in predicting climate change. Our research focuses on processes that occur in warm, turbulent clouds, where liquid water drops interact with each other and the surrounding turbulent air, which causes droplet collisions and droplet evaporation.

As is well known, the dynamics are difficult to capture, because they occur on a wide range of scales, which is the nature of of high Reynolds number turbulence. At present, the full dynamics are impossible to capture in the laboratory or by direct numerical simulation. Yet it is also impossible to make field measurements with adequate resolution, or to control the conditions in a systematic way. For this reason, we complement our laboratory experimental expertise with the field experience and the numerical investigations, of our collaborators. We are developing techniques to obtain particle tracks in high Reynolds number turbulence. These new ultrafast particle tracking methods allow us to make accurate measurements of Lagrangian statistics, which are of great importance both to practical questions of turbulent transport and to fundamental questions about the existence of a universal description of turbulence.

Max Planck Institute for Solar System Research

Water vapor in the middle atmosphere in 2009.
Water vapor in the middle atmosphere in 2009.

Mesospheric water vapor; Variability at different timescales observed by ground-based microwave spectroscopy

The importance of water vapor in Earth's atmosphere cannot be understated. It is an active green-house gas, important energy conveyer in the troposhere and a key element in many chemical reactions in the middle atmosphere. Yet, there are still many questions concerning the water vapor dynamics in the middle atmosphere.

The Max Planck Institute for Solar System Research developed a new, state-of-the art, microwave instrument in order to shed light on some of these issues. The high sensitivity and time-resolution enable us to resolve fast dynamical events which was not possible before.

Contact
Prof. Dr. Eberhard Bodenschatz
MPG - DS
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Tel. +49 551 5176-300
Fax +49 551 5176-702

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Dr. Paul Hartogh
MPG - MPS
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Tel. +49 5556 979 342/ 332
Fax +49-5556-979-219

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Most recently modified: April 2011