SCIEXTIFIC RESULTS 



31 



berg!^. however, at the extreme northern end of the soiitli llowin;^ 

 current phiees them in a favoral)k' position eventually to drift to 

 Xewfoiindland. 



In contrast to the reo-ions of hummocks and of pressure rido-es, 

 large areas of open water, known as polynyas. also form within the 



' The Different Types of Sea Ice in the North Greenland sector 



Fig. 16. - |v '^ / . sea-Ice discharged Into the Gwenland Sea. f?n . sea-Ice, congested 

 ^itte paleocrystic region, /yn^ , paleocrystlc area in some years. v;;/;/3 , fast ice. 



^^ , nany years old ice. ^^ , Sikussak. , Peary's "Big Lane" marks the line 



of shearing in the sea-ice cover. (Map after Koch, 1928). 



I 



jpolar cap ice ; these tend to occupy certain characteristic positions 

 lin the ])olar basin, two regions now definitely established being: 

 i («) A belt, or belts, several hundred miles long, parallel and just 

 |northward of the New Siberian Islands. 



I (?>) Peary's " Big Lead," north of Grant Land and (Ireenland. 

 I The fact that ))olynyas are best developed otl' the Xew Siberian 

 (Islands in winter when high atmos])heric pressure prevails over 



