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Wishman, E. 2008: LAND O’HOY!, Stavanger, Norway.

During the deglaciation a North Sea land existed at the same time as the Scandinavian Peninsula
had an isostatic rise because of the melting of the Weichselian ice cap. A brim of land along the sea
was mostly deglaciated, covered by snow during the cold season and without snow during the warm
season, when herb and shrub vegetation dominated the landscape. The ice free coast was easily
warmed by the sun during the short summer period, while the air masses flowing over the ice
covered areas were kept cold. Reaching the ice free areas, they were heated from below. They
became lighter and immediately brought to rise, and by cooling at higher levels, the content of
water vapour condensed and cumulus clouds were formed. On sunny days the cloud tops may have
reached to heights about a couple of km above the ice free ground, and may have been visible from
great distances, even from the North Sea land. The paper assumes that people during deglaciation
used this country mark as a basis for navigation.

Erik Wishman, Syftesokveien 11, N-4046 HAFRSFJORD, NORWAY. Telephone: (+47) 51590683.

Key words: Younger Dryas weather, cumulus clouds as land mark, late Palaeolithic navigation
Emneord: Yngre Dryas vær, cumulus skyer som landmerke, sen palaeolitisk navigasjon

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