Affiliation: | a The National Environmental Research Institute, Aarhus University, Department of Marine Ecology, Frederiksborgvej 399, P.O. Box 358, 4000 Roskilde, Denmark b Danish Maritime Safety Administration, Overgaden o. Vandet 62B, PO Box 1919, 1023 Copenhagen K, Denmark c The Danish Meteorological Institute, Centre for Ocean and Ice, Lyngbyvej 100, 2100 Copenhagen, Denmark d Leibnitz-Institute for Baltic Sea Research Warnemünde, Rostock 18119, Warnemünde Seast 15, Germany |