Here it is mixed vith adjacent water and forms the intermediate 

 water of the Arabian Sea. The latter fills a layer from hOO - 

 1500 meters below the subsurface water. The Intermediate water 

 is fonned in much the same manner as the subsurface v/ater, except 

 that convection does not play a part. Salinity in the upper part of 

 the intermediate water reaches a little over 36. 5 %o and decreases 

 to 35.0 - 35.5^0 at depths from 8OO to I5OO meters. This water 

 spreads south of the Equator in the western part of the ocean and 

 toward the east it goes into the Bay of Bengal at depths of 500- 

 600 meters. At the Equator it is limited by the South Indian Ocean 

 intermediate water, and when it meets with the latter, it is strongly 

 mixed, especially in the eastern part of the ocean. The temperature 

 ranges with depth from about h to 13° C and the oxygen content Is 

 0,hO to l.J;3 ml/l. 



The Deep Water . Arabian Sea deep water is formed as a result of 

 mixing of Arabian Sea intermediate water. South Indian Ocean inter- 

 mediate water, and Indian Ocean bottom water. This water maintains 

 a temperature higher than 2°C over its entire depth in the Arabian 

 Sea and only at depths greater than 3OOO meters in the bottom water 

 do the temperatures drop below this value. The salinities vary from 

 3^1.68 - 3h.'j8 to and the oxygen content is about 3 ml/l.^ 

 Temperature-Salinity Diagrams . The subsurface water, along with the 

 intermediate water, are the two most characteristic water masses of 

 the Arabian Sea. The accompanying diagrams (Figs. 6 and j) serve to 

 outline their approximate horizontal extent before losing their 

 iden^^ifying properties. The T-S curves illustrate the changes which 

 take place in the water column with distance from the source regions 



^Muromtsev, p. 9^ 



15 



