THE BARENTS SEA 



83 



Ice conditions 



The thick pack ice formed on the Barents Sea in winter disappears each sum- 

 mer, only remaining in the northern part of the Sea after a more severe winter 

 (Fig. 24). The ice reaches its southerly extreme in April, and recedes farthest 

 to the north in August-September. 



63°Ж70' 30 



30' 72° 30' 73' 30' 74' 30' 75° 3(У 76 30' 



63'30'70' 30' 71° 30' 72° 30' 73° 30' 74° 30' 75° 30' 76° 30' 

 5 4 6 Э 6 8 5 15 7 4 8 



300 



q6 3°30'70° 30' 71° 30' 72° 30 



200 

 300t 



Fig. 25. Vertical distribution of temperatures (/), phos- 

 phates (II), nitrates (III), and concentration of hydrogen 

 ions (IV) along the Kola meridian of the Barents Sea 

 (33° 30' — in August 1930) (Kxeps and Verzhbinskaya). 



Data on the temperature conditions along the Kola meridian and on the 

 ice conditions of the Barents Sea accumulated through years of work have 

 been very successfully used by N. Zubov (1932) for a system of ice prediction 

 for the Barents Sea, and therefore, to a certain extent, for other seas lying to 

 the east of it. Zubov has found that the extension of the winter ice cover of the 

 Barents Sea is closely connected with the average temperature along the Kola 

 meridian during the preceding summer. This average temperature for three 



