196 



DISCOVERY REPORTS 



STATIONS WS1I02 

 SEA MILES I 



OFFSHORE l25 

 O ' 



WSIIOO 



W5IO% 



300 



Fig. 44. Distribution of dissolved oxygen. Section off Mowe Point, 9-1 1 October 1950, survey II. 



Positions of stations are shown in Fig. 2. 



10" 



/ 



NORTHERN 



SOUTHERN 



• WS976. O WS996 



A VVS977 OWS98G A WS997 

 » WS978 



"i 1 r 



2 3 4 



OXYGEN CC AlTRE 



F'g- 45- Temperature and oxygen in the 200-600 m. layer at the 'William Scoresby' stations, survey I. Positions of the 

 stations are shown in Fig. 1. The two heavy lines are taken from Fig. 46, and show the temperature/oxygen relationships in 

 this layer to the north and south of the area surveyed, compiled from selected 'Meteor' stations. 



are reproduced in Fig. 45 and show that the 'William ScoresbyV observations lie in between these 

 two curves, the stations in the north and closer to the continental shelf lying near to the curve for the 

 ' Meteor's ' northern stations. 



The decrease in oxygen content at the northerly ' Meteor ' stations between 8° and 12 C. represents 

 the layer of minimal oxygen content which extends across the tropical South Atlantic ocean (Fig. 47). 

 This layer Riley (1951) has shown to result probably from the balance between the rates of decomposi- 



