Vestfjordundersøkelsene 1978, 1, Ferskvannsbudsjett og vindforhold

Abstract

Mean monthly values of freshwater run off to the different parts of Vestfjorden has been computed. About 90 per cent of the run off comes from the eastern side of the fjord. There is a pronounced yearly amplitude of the run off with a maximum during summer and a minimum during late winter. Due to evaporation from the sea surface the net flux of fresh water into Vestfjorden is very small in winter, some times it even is negative. Wind conditions during winter is mainly dominated by two kinds of events: drainage of cold air from the mountains with easterly and northeasterly winds, and cyclone passage with southwesterly winds. The topography of the mountains surrounding the fjord is largely influencing the wind conditions. The wind conditions during April 1978 are described particularly.