32 MAUIOX EXPP:DITI0X to DAVIS STRAIT AND BAFFIX BAY 



Siberia indicates that the wind is a major factor in keeping the 

 polar cap ice in motion. 



The second famons polynya was discovered and described by Peary 

 (1907. p. 97) as the " Bi<r Lead "' (see fig. 16, p. 81), It coincides iii 

 position very closely with the continental edge running along the 

 eighty-fourth i)arallel from Grant Land to Cape Bridgeman. Green- 

 land. The " Big Lead ** is smaller than the Siberian polynya. being 



seldom over a mile or more in width vet having an estimated length 

 of at least 300 miles.-° 



PACK ICE 



Although seamen usually refer to any flat ice drifting at sea a^ 

 "■ field ice,'' such a practice is not reconnnended because it tends to 

 confuse one not thoi'oughly familiar with ice terms. It is better to 

 follow the classification of Priestley (19-J-J. p. 398). who defines pack 

 ice as any sea ice which has drifted from its original position under 

 the influence of winds and currents. The word " ])ack " iloes not 

 necessarily mean the ice is tightly packed together, because the pack 

 may have large or small areas of open water, as the case nniy be, 

 within its bounds. Its northern sources are the fast ice and the 



V,... „. iilniu" wiis (.hsfi-vcd t).v liiin south of the •' Itii; Load." Koch also ohservfii n *'''="' 

 erly furrcut runiiiim in hcrwceii the ice Iloes aloiiu tlu' luii'thcrn coast of (JrciMilaiul Wf" 

 of Cape Bridyciiiaii. 



