228 



BIOLOGY OF THE SEAS OF THE U.S.S.R. 



Fig. 96a. Hydrological cross sections through 

 the southern part of the Kara Sea from Shubert 

 Bay to Yamal. A In September 1927 (Vasnetzov). 



defined summer stratification, vigorous ice formation and the formation of 

 surface saline waters in the winter. 



Thus the following water masses can be distinguished in the Kara Sea 

 according to their origin : 



(/) Local Kara Sea waters of small or medium depths. 



(2) Deep cold and saline waters of local origin (having become cold and 



more saline on the surface of the sea in the winter, they have sunk 



down). 

 (J) Ob-Yenisey waters with a low salinity and comparatively high summer 



temperature. 



Fig. 96b. As Fig. 96a but in September 1945 (Zenke- 

 vitch and Filatova). 



