. 4742 1003 SOUNDING IN METRES _ 4026 - Fig. 46. Distribution of salinity. Section off Punta Aguja, July 21-23. The position of this section is shown in Figs. 2 and 12; the corresponding temperature section, in Fig. 36. CAPO BLANCO At Capo Blanco, surface salinity is lowered from two causes: at the surface by the southerly projecting tongue of the Equatorial Counter-current, and from below by up- welling. The upwelling which is seen in Figs. 41 and 50 to be induced offshore, and the southerly intrusion of equatorial water seen in the poorly saline hot-water tongue, are both probably indication
. 4742 1003 SOUNDING IN METRES _ 4026 - Fig. 46. Distribution of salinity. Section off Punta Aguja, July 21-23. The position of this section is shown in Figs. 2 and 12; the corresponding temperature section, in Fig. 36. CAPO BLANCO At Capo Blanco, surface salinity is lowered from two causes: at the surface by the southerly projecting tongue of the Equatorial Counter-current, and from below by up- welling. The upwelling which is seen in Figs. 41 and 50 to be induced offshore, and the southerly intrusion of equatorial water seen in the poorly saline hot-water tongue, are both probably indications of the divergence of the Peru Current from the South American coast. At a depth of 40-120 m. a mid-water tongue of higher salinity (35-10 °/oo) represents an advance of subtropical water towards the coast, presumably to compensate for the upwelling water. SANTA ELENA The mid-water tongue noted off Capo Blanco is drawn both northwards and towards the Ecuador coast, beneath the Equatorial Counter-current. This may be seen in Fig. 49, which represents a section in two planes. On the right of the section, Sts. WS 715-719 run east and west off Santa Elena. On the left, Sts. WS 719-726 run north-east by north and south-west by south, that is, they run very nearly at right angles to those off Santa Elena: they run across the direction of the Peru Current on its course from South America to the Galapagos Islands. At this stage the current represents the transition between the Peru and the South Equatorial Currents. The observations off
Size: 2710px × 1844px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificexpedition
