. SOUNDING IN METRES_ 5437 - 3ZSS 2307 1593 Fig. 54. Distribution of phosphate (per m.^). Section off Cape Carranza, May iS-20. Corresponding sections of temperature and saHnity are illustrated on p. 138. into two parts: within 25 miles of the shore turbulence and upwelling seem phenomenal; from 25 to 50 miles offshore the isotherms run level. Corresponding to these two parts we find that surface phosphate values in the upper layers from 25 to 50 miles are mini- mal, whereas in the upwelling region they are medium. Moreover, rich phosphates are nearer the surface in the upwelling region than o
. SOUNDING IN METRES_ 5437 - 3ZSS 2307 1593 Fig. 54. Distribution of phosphate (per m.^). Section off Cape Carranza, May iS-20. Corresponding sections of temperature and saHnity are illustrated on p. 138. into two parts: within 25 miles of the shore turbulence and upwelling seem phenomenal; from 25 to 50 miles offshore the isotherms run level. Corresponding to these two parts we find that surface phosphate values in the upper layers from 25 to 50 miles are mini- mal, whereas in the upwelling region they are medium. Moreover, rich phosphates are nearer the surface in the upwelling region than offshore. Off Antofagasta the phosphate content at the surface changed from rich to medium with change of wind and increase of temperature (Figs. 58 and 59). Off San Juan, the surface temperatures over the regions of high, medium and low phosphate concentration are respectively i3-79-i5-36° C, i6-24-i7-4° C, and i8-8o-i9-48' C. Correlation between phosphate distribution and temperature in these five localities is straightforward because the area of disturb-
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