Discovery reports (1929) Discovery reports discoveryreports131936inst Year: 1929 SOUTHERN LIMITS OF THE PERU COASTAL CURRENT STATION NUMBER5_WS726 WS7g5 UTITUDEâ ' 7°5 WS724 100- ? 200- â OO- OFF PUNTA AGUJA ?04 MILES OFF CAPO BLANCO no MILES OFF SANTA ELENA 54 MILES Fig. 69. Distribution of temperature (° C). Section of the current as it leaves the Peruvian coast on its way to the Gala- pagos Islands, August 1-4. The position of this section is shown in Fig. 2; the corresponding salinity section, in Fig. 49. plants indigenous to regions north of the Rio Bio-Bio have been washed up at C
Discovery reports (1929) Discovery reports discoveryreports131936inst Year: 1929 SOUTHERN LIMITS OF THE PERU COASTAL CURRENT STATION NUMBER5_WS726 WS7g5 UTITUDEâ ' 7°5 WS724 100- ? 200- â OO- OFF PUNTA AGUJA ?04 MILES OFF CAPO BLANCO no MILES OFF SANTA ELENA 54 MILES Fig. 69. Distribution of temperature (° C). Section of the current as it leaves the Peruvian coast on its way to the Gala- pagos Islands, August 1-4. The position of this section is shown in Fig. 2; the corresponding salinity section, in Fig. 49. plants indigenous to regions north of the Rio Bio-Bio have been washed up at Corral, and that this has been accepted as evidence of a southerly flowing current. Reference to the seasonal data given in Table IX (p. 172) shows that during winter the surface temperatures on the west coast had experienced a decline everywhere except in the latitudes 34-39° S, but that here from May to September the temperature had risen. As this is within the monsoon area, we may infer this rise to have followed an alteration in the direction of surface drift. No widespread northerly drift on this coast has been found unattended by upwelling and the May temperatures may still have borne the impress of the cooling effects of the southerly winds of summer: but with the arrival, during the winter months, of the monsoon from the north, the surface drift probably became southerly and upwelling automatically came to a stop; the surface temperature rose, and this has shown itself in spite of the advance of winter. According to these observations, the southern limit of the northerly current varies with season, and with it the upwelling characteristic of the Peru Coastal Current. According to Table IX, the surface temperature south of 40° S shows no seasonal anomaly, and this water may be regarded as belonging to the Cape Horn Current. The extreme southern limit of the Peru Coastal Current may therefore be placed at 40-41 ° S, which falls within a degree of Mossman's m
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