282 



Ice in the Sea 



Fig. 131. a quantitative representation of a number of comparisons between ice-melting 

 effects and related phenomena. The shaded area bounded by the full line in the normal pack- 

 ice area. The dotted line marks the mixing zone. The entire melting area, with a uniform 

 thickness of 150 metres is divided into six parts; in summer the southernmost is heated an 

 average of 5°F, and the northernmost only 0-5''F. The spot "M" off Cape Farewell repre- 

 sents the annual crop of glacial ice expressed in the same scale as the pack ice and as one 

 large berg. The shaded area 'W represents the total annual discharge of glacial ice into 

 BaflSn Bay, expressed on the same scale and in terms of pack ice 6 ft thick. 



