1. Department of Environmental Meteorology, University of Trier
Behringstr. 21
DE-54286 Trier Germany
2. Alfred Wegener Institute for Polar and Marine Research
Bussestr. 24
DE-27570 Bremerhaven Germany
3. Centre for Polar Observation and Modelling, University College London
Gower Street
WC1E 6BT London UK