STA.no. 153. 70 



60 



50 



40 



30 



20 



16 



100 - 



200- 



300- 



400- 



500- 



600 



OXYGEN MINIMUM 

 LAYER (0.lml./l.) 



.1 

 I 

 I 

 t 



I 



I 



( 



- 100 



200 



- 300 



- 400 



- 500 



600 



Figure 26. — Vertical profile of dissolved oxygen along line 153 of CalCOFI cruise 6004-B. The contour Interval here and 



in the other vertical profiles of dissolved oxygen is 0.5 ml./l. 



Figure 28, the oxygen profile between sta- 

 tions 40 and 48, illustrates a feature of the 

 oxygen distribution that can be seen also, 

 to a lesser degree, in profiles immediately 

 to the north and south. The corresponding 

 salinity distribution shows a well-developed 

 tongue of low- salinity water (California Cur- 

 rent minimum), below the surface but mostly 

 above 120 m., spreading from the west and 

 attenuating to the east. An oxygen maximum 

 seems to overlie this salinity minimum, though 

 there is some overlap in places. One cannot 

 be sure that a causal relation exists between 

 the two features, but it seems possible. 



Inorganic phosphorus 



This property was measured onmosthydro- 

 casts on TO-60-1, although not on 6004-B. 

 The replicates were frequently more disparate 

 than is desirable, as shown in the data list 

 (Scripps Institution of Oceanography, 1967). 

 Also, the profiles are generally featureless 

 except for a strong gradient like that in the 

 oxygen distribution and at a similar depth- - 

 at the bottom of the thermocline. For these 

 reasons no profiles are reproduced. More is 

 said in the section on the horizontal distribu- 

 tion of this property. 



31 



