NON-CONSERVATIVE PROPERTIES 



The distribution of dissolved inorganic phosphate-phosphorus 

 The sections showing the distribution of inorganic phosphate (Figs. 50-6) indicate that on both surveys 

 the pattern of distribution is essentially similar. 



The lowest phosphate concentrations are found in the oceanic surface-waters, where from a com- 



STATIONS WSI07O 

 SEA MILES ' 



OFFSHORE l0 ° 

 O- 



WSIOW 



IOO 



Fig. 51. Distribution of phosphate (mg. ats. P/m. 3 ). Section off Sylvia Hill, 10-11 March 1950, survey I. 



Positions of stations are shown in Fig. 1. 



STATIONS WS97(j 



SEA MILES I 



OFFSHORE 175 

 O 



4O0 



Fig. 52. Distribution of phosphate (mg. ats. P/m. 3 ). Section off Walvis Bay, 6-8 March 1950, survey I. 



Positions of stations are shown in Fig. 1. 



plete absence of phosphate values of up to 0-5 mg. ats. P/m. 3 were found. The upwelled coastal waters 

 present a sharp contrast. In them the phosphate content is very high, on occasion reaching more than 

 2-0 mg. ats. P/m. 3 . 



Below the surface-waters the phosphate concentration increases down to the sea-bed inshore and 



