Archive image from page 21 of Discovery reports (1935-1936) Discovery reports discoveryreports11inst Year: 1935-1936 DISCOVERY REPORTS ' The sub-Antarctic Zone is in the region of constant westerly winds and the surface water is moving eastwards with the West Wind Drift. This water is in continuous movement round the southern ocean. The zone includes Cape Horn, the Falkland 40 38' 36' 3* 5+- .V> / â ' T \ ./ / ,.JOO°'' / / .. 2000 ' - c, 3000 \ ..ioog=urc-. ,-N- .-><â vâ-;â \ ')) y \ K II : ' i ..« <0° )r- :â¢â¢â¢ : - -. . - - - _ \\ \ /j&r / \x * L- v&S'' NvL'
Archive image from page 21 of Discovery reports (1935-1936) Discovery reports discoveryreports11inst Year: 1935-1936 DISCOVERY REPORTS ' The sub-Antarctic Zone is in the region of constant westerly winds and the surface water is moving eastwards with the West Wind Drift. This water is in continuous movement round the southern ocean. The zone includes Cape Horn, the Falkland 40 38' 36' 3* 5+- .V> / â ' T \ ./ / ,.JOO°'' / / .. 2000 ' - c, 3000 \ ..ioog=urc-. ,-N- .-><â vâ-;â \ ')) y \ K II : ' i ..« <0° )r- :â¢â¢â¢ : - -. . - - - _ \\ \ /j&r / \x * L- v&S'' NvL'~<\ 'A /1 / ('N* / ~ 33 54 55 40° 38° 36° 34' Fig. 2. Contour chart showing the submarine plateau upon which South Georgia stands and covering the main area of the 1926-7 plankton survey (after Herdman, 1932). Islands and that part of the Patagonian coast under the influence of the Falkland current. It also just includes Gough Island and Tristan da Cunha.' For the general distribution of these zones in the region under discussion see Fig. 4. ' In the Antarctic region three distinct layers of water can be observed in the vertical section. In the upper layer is the cold and poorly saline Antarctic water, below which the salinity and temperature increase to a maximum in an intermediate layer; while deeper still, towards the bottom, the temperature, and also slightly the salinity, decrease as a third layer is encountered. ' The work of Dr O. Pettersson and J. W. Sandstrom has shown how polar influences give rise to a circulation of water in the ocean and a system of layers such as has been
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