creased as a result of this intermingling with these waters . 



Our chart of constant currents in the Norwegian and Greenland Seas is mainly for the sur- 

 face layer. The observations on which the chart is based were for the most part made during the 

 warm season of the year. Winter (as well as summer) observations were used only for the compi- 

 lation of the current chart in the southern part of the Norwegian Sea . An analysis of the data ob- 

 tained during the second oceanographic survey of the Norwegian and Greenland Seas (June 1955) 

 confirmed the accuracy of the basic features of our current chart . 



Seasonal current charts will have to be compiled since herrings are now being fished 

 throughout the year. In the very near future, a study of the dependence of the constant currents of 

 the Norwegian and Greenland Seas on the winds will be necessary and the processes of eddy form- 

 ation will have to be examined and investigated. The method of studying currents must also be 

 improved by adapting the regular instrument observations to the application of the latest scientific 

 and technical advances . 



Conclusions 



1 . The Atlantic current in the Norwegian and Greenland Seas spreads in the form of a ser- 

 ies of more or less separate branches (the principal of these being the eastern, central and western 

 branches), and not in a continuous stream, as is shown in the current chart of Helland-Hansen and 

 Nansen . 



2. In the central area of the Norwegian Sea, there are a small number of anti-cyclonic 

 eddies in which the Atlantic waters sink to the lower depths . 



3. The Atlantic waters enter the area of Jan Mayen not from the north-east, as is shown 

 in Nansen's chart, but from the south and south-east in the form of an independent branch. 



4. From the authors' current chart it is possible to establish the positions of the zones of 

 the polar current - the zones of convergence of warm and cold currents . These zones are situ- 

 ated in the following areas: the south-western part of the Norwegian Sea, Mohn's Threshold to the 

 north-east of Jan Mayen, the areas to the west and south-west of Bear Island and West Spitsbergen. 



5. The authors' chart indicates the close link between the constant currents of the Norwegian 

 and Greenland Seas and the contours of the sea bed. 



75 



