WGNE/GASS Workshop: The Grey Zone Project

December 1-3, 2014
Max Planck Institute for Meteorology
Bundesstrasse 53
D-20146 Hamburg

As a result of the ever increasing computer resources, more and more numerical weather and climate models are operating in the so called "Grey Zone" at horizontal resolutions in the range of 1 to 10 km. As these resolutions exceed the depth of the atmosphere, they allow for numerically resolved vertical turnover behaviour, but clouds and convective transport are only partly resolved. As a response to the need to systematically explore the behaviour of the models operating in the "Grey Zone", the Working Group on Numerical Experimentation (WGNE) has initiated the Opens external link in current windowGrey Zone Project.

A WGNE/GASS workshop on the "Grey Zone Project" will be held at the Max Planck Institute for Meteorology, Hamburg, Germany on December 1-3, 2014.
Initiates file downloadFinal program
Initiates file downloadList of participants
   Directions to MPI-M

The objectives of the workshop are to:

  • present and discuss the Model Intercomparison Study on the Cold Air Outbreak such as observed during the CONSTRAIN field campaign,
  • present and discuss novel ways of representation of physical processes (i.e. clouds, convection and turbulence) in the grey zone,
  • discuss any further coordinated future activities.

We kindly invite all the modellers that have participated in the intercomparison study, but also other scientists who have an interest in the topic of how representing physical processes such as clouds, turbulence and convection in models that operate in the grey zone with respect to these processes.

Please let us know whether you are interested in participating in this workshop. You can do this by sending an email to
Opens window for sending emaillorenzo.tomassini@we dont want spammpimet.mpg.de

More information on the workshop will be posted in the coming weeks.

The Organisation Committee
Pier Siebesma, Lorenzo Tomassini, Paul Field, Stephan de Roode, Axel Seifert & Adrian Hill