Discovery reports (1929) Discovery reports discoveryreports131936inst Year: 1929 I70 DISCOVERY REPORTS four weeks to August 7 the temperature dropped to less than 15° C. It then rose again, reaching 1573° C. at the surface on August 20. The diagram raises two points of interest, the connection with available wind records, and the differing composition of the water on July 8 and August 7. On July 8 the tem- perature gradient from 15-5° C. near the bottom to 17-33° C. at the surface amounted to 0-38° per metre. On August 7 the water was cool throughout, the gradient from 14-56° C. at the botto
Discovery reports (1929) Discovery reports discoveryreports131936inst Year: 1929 I70 DISCOVERY REPORTS four weeks to August 7 the temperature dropped to less than 15° C. It then rose again, reaching 1573° C. at the surface on August 20. The diagram raises two points of interest, the connection with available wind records, and the differing composition of the water on July 8 and August 7. On July 8 the tem- perature gradient from 15-5° C. near the bottom to 17-33° C. at the surface amounted to 0-38° per metre. On August 7 the water was cool throughout, the gradient from 14-56° C. at the bottom to 14-88° C. at the surface being about 0-005° P'* metre. From this it follows that all the water off Palominos Island on August 7 was upwelled water and that it was derived from the 14-15° isothermal depth which at this time of the year off Callao lay at about 80-120 m. 5TATI0N NUMBERS_WS6G2 DATE— ' 10- WS663 JUNE3Q J_ WSG72 WSB84WSB65 JULY 10 ' ' JULY 20 J . L 20 30 40- 50- BO Fig. 51. Diagram illustrating temperature changes off Palominos Island in the period June 26 to August 20. Note. The depth scale is nearly x 5 that of the sections; the sounding in metres is given at the appropriate depth for each section. Table VII. Relation betzveen inshore surface temperature and the strength and direction of wind at Palominos Island Date Temperature ° C. Wind Mean rise per day Mean fall per day Mean vector Force miles per day June 25 \ July 8) July 8) Aug. 7/ Aug. 7| 20/ 0-04 0-065 0-082 S 17° E S26°E S 4-3 7-0 2-3
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