. Discovery reports. Discovery (Ship); Scientific expeditions. UPWELLING 199 The water layers which are drawn upwards or which reach the surface as a result of upwelling are shown in the sections illustrating salinity, pp. 138-143 and pp. 164-169. South of the subtropical convergence, upwelling involved two water layers; sub- Antarctic water coming to the surface, and the return current beneath showing upward 40 5 °C 25 < 2c M CO â 2. < LU ^ <F! < < U 3 < a: < < z 0 LlJ a, Is. AGUJ iLANI z LlJ _l LU Q bJ b- < n < â¢a: ai<j- t< liJ Q 0 _l z Oh:o P Q. X _l ^â
. Discovery reports. Discovery (Ship); Scientific expeditions. UPWELLING 199 The water layers which are drawn upwards or which reach the surface as a result of upwelling are shown in the sections illustrating salinity, pp. 138-143 and pp. 164-169. South of the subtropical convergence, upwelling involved two water layers; sub- Antarctic water coming to the surface, and the return current beneath showing upward 40 5 °C 25 < 2c M CO â 2. < LU ^ <F! < < U 3 < a: < < z 0 LlJ a, Is. AGUJ iLANI z LlJ _l LU Q bJ b- < n < â¢a: ai<j- t< liJ Q 0 _l z Oh:o P Q. X _l ^â z _l < cQzq: Z < 0 < Z CC < < 3 03< 1 1 Q. 1 1 < 1 < 1 1 0 1 L3 1 1 1 1 30°S 1 20°S 1 I0°5 1 1 so- ls H 10-. Fig. 64. Measurement of upwelling. Comparison of inshore surface temperatures (curve D) with tempera- tures at a depth of 150 m. outside the upwelling zone (curve A')\ with surface temperatures offshore in curve j. For explanation see text and Table XVI. Note. The record marked O in cur\'e D represents the temperature of upwelled water in the Peru Current, but was obtained at 35 miles from shore. The high temperature inshore represents the Equatorial Counter-current and is not upwelled water (cf. Figs. 41 and 70). movement: only at Cape Carranza (Fig. 18) was the latter drawn at all close to the surface. North of the subtropical convergence, upwelling involved as many as three layers. The return current featured at the surface at two localities at Antofagasta and San Juan, where upwelling was unusually strong, and sub-Antarctic water appeared. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Institute of Oceanographic Sciences (Great Britain); National Institute of Oceanography; Great Britain. Colonial Office. "Discovery" Committee. London, New Yo
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