■58 discovery reports 



First survey (autumn) 



Horizontal distribution of temperature and salinity 

 On the first survey the lowest surface-temperatures were found in the south of the region, off Pater- 

 noster Point (32 40' S.) where the lowest recorded was 12-5° C. This cold water, although we have 

 no direct evidence, was probably confined to a fairly narrow coastal strip. In the vicinity of Cape of 

 Good Hope the thermograph readings reached a value of 17 C. only 3 miles offshore, and so there 

 is little likelihood that the cool water extended east of this point. 



(I 



25- 



sL- * ** 2 i: 



*5 £h ^ ?k S SJ 12-5* 



'« #5 ** 5-o 



^ |f §5 £* 5|io-o5 



7-5 



r 



3 



Fig. 9. Photograph of the annotated distant-reading thermograph chart for 

 Saturday, 11 March 1950. Vertical scale, temperature in ° C. 



Northwards, towards the Orange river mouth, the extent of cool water became more restricted, and 

 in 29 S. the warmer oceanic water penetrated more closely to the coast. The outflow of fresh water 

 from the Orange river can be detected over a wide area. The surface-salinities at stations in the neigh- 

 bourhood were vastly reduced (32-39 % at WS 1001) but the reduction affected only a thin surface- 

 layer, and 50 miles offshore at WS 1000 the surface-salinity was that of the normal sea-water of the 

 region. To the west of station WS 998 the boundary with the warm oceanic water was sharply 



