The public availability of the mesoscale model MM5 and the user support from the National Center for Atmospheric Research are greatly appreciated. Several of the contour plots have been prepared with the RIP-package from Mark Stoelinga, University of Washington, Seattle. ECMWF provided the global analyses and the NOAA-11 data were obtained from the Satellite Receiving Station of Dundee University. Hermann Mannstein, Deutsches Zentrum für Luft- und Raumfahrt, Oberpfaffenhofen, helped with the display and interpretation of the satellite images. Tassilo Kubitz, Freie Universität Berlin, provided the Narssarssuaq sounding. A discussion with Philippe Bougeault, Météo France, Toulouse, on an earlier version of this work sparked off the examination of the sensitivity to surface friction. Comments from two anonymous reviewers helped to improve the presentation.
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