{ 





2500' 



j I TEMPERATURES 



I > B ETWEEN 



J I 2 8.6° AND 3: 



\ WARMER 



LOWEST 

 LAYER 



iSii!MiW!i ii » i »> i t»^iiW»i^^ 



a:i; ! ;!:i:!:!; ! ;:!!s:;!:sssaasssaaaa! ; a!5!s!!;:!g ssg 





T EMPERATURES 



B ETWEEN 

 3 0.6° AND 3 2 ' 



Figure 2-12. — Three layers of water. 



dips under the colder arctic waters and which circulates in a 

 counterclockwise direction. The lowest layer is again colder 

 water, with temperatures between 30.6° F. and 32° F. 



MARINE LIFE 



Although the waters are cold and are ice-covered for most of the 

 year, they are not devoid of life. Fish are abundant in the shallow 

 seas along the continental shelf and especially at the mouths of 

 rivers. Seals, walrus, whales, and a few sharks are found. Sev- 

 eral kinds of shell fish, jelly fish, and shrimp are abundant. Even 

 at considerable depths, 3,000 feet or more, diverse mollusks, larvae, 

 medusae and Crustacea are found in large numbers. These smaller 

 forms of marine life provide the food for the walrus and seals. 



40 



