i6o 



DISCOVERY REPORTS 



south-east direction the subtropical convergence is cut sharply; the isohalines of 

 34-40-34-90 °l^^ being bunched between Sts. 55-57 in the positions given in Table V. 

 In his fig. 6 illustrating Sts. 60-70 which lie south-west to north-east, the section is in- 

 clined to run along the convergence ; the latter is in consequence not well defined, but 

 the isohalines of 34-40-34-9o °/^^ are spread out between Sts. 62 and 67, and the iso- 



STN NO5_WS60l 

 LATITUDE- 135° 



WSSI£ 

 I 



100- 



1- 



UJ 



200 



300- 



400- 



Fig. 42. Section illustrating the distribution of salinity in the upper 400 metres along the path of the current. The section 

 runs roughly parallel to the coast and is situated at a mean distance of about 100 miles from it. The dotted line indicates 

 the value of the surface salinity at the inshore station corresponding to each of the stations plotted ; and the broken line 

 indicates the maximum depth apparently affected by upwelling at each of these localities. 



halines of 34-60 and 34-70 °l^^ cross the section in three places. The positions occupied 

 by the convergence in this section together with our own results are also given in the 

 table, from which the convergence is seen to run east and west in the open ocean and to 

 curve northwards on approaching the coast. The disposition of surface isohalines given 

 by Schott shows a similar tendency. In the eastern South Atlantic, on the other hand, 

 the subtropical convergence pursues an easterly course, and in 10° E is placed in lat. 

 37° 30' S (Deacon, 1933, p. 211). 



In consequence of this, the Peru Coastal Current crosses a convergence: and two 



