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3rd HyMeX workshop 1-4 June 2009 Heraklion (Gournes), Crete-Greece

Planned HyMeX contributions by Karlsruhe Institute of Technology

Christoph Kottmeier (Institut für Meteorologie und Klimaforschung (IMK), Karlsruhe Institute of Technology); Ulrich Corsmeier, Norbert Kalthoff, Bernhard Vogel, Gerd Schädler, Sarah Jones

The Karlsruhe of Technology (KIT) aims to contribute substantially to HyMeX by observational and modelling efforts as part of a larger German involvement. The research plans given below depend on the funding situation.
. High Impact Cyclones
One major scientific goal (KIT-1) of the project is to investigate the dynamical and thermo-dynamical mechanisms of HIW-cyclones by measurements with the new long range and high altitude German research aircraft HALO and by extended model simulations using the NWP model COSMO-DE. Additionally the research aircraft DO 128 will operate close to the sea surface for measurements of turbulent fluxes before, during and after the passage of cyclones and a meteorological surface station equipped with the IMK mobile research platform KITCube will be deployed at the northern tip of Corsica. The measurement platform KITCube is designed to investigate open questions in the research field of atmospheric convection. This includes turbulence and moist convection in the atmospheric boundary layer as well as initiation and development of deep convection. To collect the appropriate data the system is mobile and to a large extent autonomous. Most of the measuring devices are remotely controlled from a master control centre on site, where also relevant parameters are sampled, displayed, stored and distributed via internet. The control system takes advantage from the near real time data availability of the in situ and remote sensing data in generating and applying automatically instruments settings (e.g. scan pattern) adapted to the changing meteorological conditions. These plans contribute to WG3 and WG4.
. Natural and Anthropogenic Aerosols
A second focus (KIT-2) ist on the effects of natural and anthropogenic aerosol particles on dynamical and hydrometeorological processes in the Mediterranean. Aerosols are currently raising the greatest uncertainties when quantifying the anthropogenic contribution to climate change as documented in the IPCC report 2007. If we want to quantify the role of anthropogenic aerosol particles on the regional scale weather it is important to separate their contribution from those of the natural particles. In the Mediterranean natural particles as sea salt and mineral dust, particles from vegetation fires, and anthropogenic primary and secondary particles are present. The percentage contribution of the individual classes to the total aerosol load differs quite substantially during specific synoptic situations and during the seasons. Consequently, the interaction of the aerosol particles with the state of the atmosphere will also show seasonality.
We plan to use COSMO-ART (Vogel et al., 2009) developed at KIT within HyMeX and also ChArMex to address the scientific questions of (i) the importance of natural and anthropogenic aerosol particles for weather systems in the Mediterranean and the adjacent regions, and (ii) the interaction of aerosol particles with atmospheric chemistry. For that purpose numerous simulations will be carried out and the results will be used to quantify the feedback processes between the aerosol particles and the state of the atmosphere. There will be a close link of our modelling work with the experimental activities of HyMex and ChArMex as we need the data for the initialization and the validation of the model.
. Regional Climate and Water Cycle Modelling
Kit is involved via IMK in a planned German-Italian cooperation on coupling the regional ocean model NEMO to the regional climate model COSMO-CLM. The development of the coupling and the validation of the coupled system needs close coordination with the observational efforts within HyMeX. The mid-term perspective is the possibility of climate change study in the Mediterranean with a highly improved Regional Earth System Model.