the ocean. She divided the ocean into four layers: (l) a sub- 

 surface layer of subtropical origin, resting on (2) a freshened 

 Intermediate layer of Antarctic origin; below this layer is (3) 

 a vann, saline deep layer which circulates toward the south; and, 

 finally (h) there is again on the sea-bottom, cold Antarctic 

 water directed toward the north. It was also pointed out by 

 Moller that in the eastern part of the ocean the Antarctic Inter- 

 mediate Current is much better developed than in the west. On the 

 western side there is. predominance of a warm, deep current coming 

 from the Arabian Sea. 



Ocean survey expeditions in the Indian Ocean were suspended by 

 World War II and it was not until 19^8 that observations were re- 

 newed by the Swedish cruise of the Albatross III ^ which occupied 

 30 deep sea stations in equatorial latitudes. Much information was 

 gained from data obtained on this cruise concerning the Equatorial 

 Counter Current during the winter season of the Northern Hemisphere. 

 In February this current covers a zone between 6° and 8°S. latitude 

 and reaches a maximum velocity of 22 cm/sec at a depth of 75 meters. 



Oceanographic data obtained by the Norsel I and Norsel II 

 during 1955-56 were studied by P. Tchernia^ to determltie the dynamic 

 structure of currents of the North Equatorial section of the Indian 

 Ocean. He constructed meridional cross sections mainly in the 

 winter monsoon season and none were made in the summer monsoon. 



•"" Svenska djupharsexpedltionen . Reports edited by Hans Fetters sor. 

 (Got eb org : Blenders boktr. , 1951}- 



^P. Tchernia, H. Lacombe, and P. Guibout, "Some New Hydrological 

 Observations in the Equatorial Region of the Indian Ocean"; France, 

 Bulletin d' Information , x(3) (March I958), pp. 115-1^3- 



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