360 



Alf Trolle. 



of this reaction current, however, the average salinity of the lowermost 

 layer in the mouth of Øresund did not increase during the period 

 mentioned; this can be explained as due to the position of the station 

 near the bar at the mouth of the fjord, where along with the in- 

 ward movement of the lower layers there has been a vertical move- 

 ment, bringing the deeper layers upwards and partially mixing thorn 

 with the less saline upper layer, the mixture being carried eastwards. 

 The • — 1.5° isotherm shows in its course, that there is a rise in 

 temperature in towards land, caused by the lowermost and warm 

 layer being pressed a little upward, and that a mixture of warmer, 

 fresher water has occurred in the uppermost layers. 



Remarks on the temperature, salinity and density diagrams for the 



stations in Sect. II. 



Station LXXIII, 22/vii 1908. 76°39.5'N., 18°35'W. 



— LXXV, 23/vii 1908. 76°42' N., 18°05' W. 



— LXXVI, 23/VII 1908. 77°24' N., 16°00' W. 



— LXXVI I, 24/vii 1908. 78°00' N., 15°18' W. 



The diagrams for these four stations show in the main quite a 

 uniform distribution of temperature and salinity, and the conditions, 

 as already mentioned, correspond to those in the western part of the 

 Polar Stream. 



Dcn-sily 2* 



Salinity %o 29 00 2s so 7S 50 



Temp er £Ltur e. - 2 ° 



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00 г^> so ?S 2500 25 M TS Z600 ZS 50 75 Z7 00 £S M 75 28 00 



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station LXXIII. 



The diagrams for the uppermost 150 m. of St. LXXVII are al- 

 most analogous to the diagrams for St. IX in Sect. 1. At these two 

 stations the temperature minimum reaches its lowest value and lies 

 deepest. 



When we took these series, we were in both cases at the western 

 edge of the heavy, polar drift-ice (the first time (1906) we came from 

 the east, the second time (1908) from the Avest). 



100 



200 



300 



100 



500 



