. The Composition of sea-water : comparative and descriptive oceanography. Seawater -- Composition. Fig. 14. Seasonal migration of upwelling along Canary and Benguela coasts, as indicated by surface-temperature anomaly with respect to five-degree zonal averages in the Atlantic Ocean for the months of January, April, July and October. Isopleth indicates — 5°C anomaly and number is extreme value of anomaly inshore from isopleth. (After Bohnecke, 1936, Beil. XX-XXIII.) (v) West Australia There seems to be no clear-cut evidence of upwelling along the western coast of Australia (Fig. 11), contrary
. The Composition of sea-water : comparative and descriptive oceanography. Seawater -- Composition. Fig. 14. Seasonal migration of upwelling along Canary and Benguela coasts, as indicated by surface-temperature anomaly with respect to five-degree zonal averages in the Atlantic Ocean for the months of January, April, July and October. Isopleth indicates — 5°C anomaly and number is extreme value of anomaly inshore from isopleth. (After Bohnecke, 1936, Beil. XX-XXIII.) (v) West Australia There seems to be no clear-cut evidence of upwelling along the western coast of Australia (Fig. 11), contrary to what is suggested by the index. Surface iso- therms in the region remain essentially zonal throughout the year, and tem- perature anomaly charts give no indication, either in summer or winter, of any cooling near the coastal boundary (Schott, 1935). Although southerly winds prevail in summer, so that the index predicts strong coastal upwelling, there is no thermal evidence of upwelling, and currents during this season are weak and variable (Koninklijk Nederlands Meteorologisch Instituut, 1952). We have no explanation for the apparent failure of the index in this little known region. Thus, with the exception of the Indian Ocean, behavior of the index is in qualitative agreement with what is known about seasonal and geographical variations of coastal upwelling. This suggests that a simple model of dependence of vertical motion on the component of wind stress parallel to the coast and the resulting offshore Ekman transport is applicable. With better wind data it might be possible to make a more sophisticated analysis of the relationship which might then have some predictive value for particular seasons and 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 Hill, M. N. (Maurice Neville), 1919-. New Yo
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