ANTARCTIC ADVENTURE AND RESEARCH 



to show that the anticyclone is confined to the lower 

 layers of the atmosphere. 



We have not much knowledge of wands on the 

 plateau except in midsummer. On the longer journeys 

 the dominant winds (and direction of snow ridges) 

 were as follows : 



The writer from his experience of many weeks spent 

 in the valleys of the great outlet glaciers is sure that 

 the winds in these deep troughs (often four thousand 

 feet deep) have little relation to the true circulation. 

 They are almost entirely controlled by the topography 

 and blow up or down the valley, usually the latter. So 

 also the winds in the three permanent stations of Cape 

 Armitage (1902-4), Cape Royds (1908), and Cape 

 Evans (1911-12) are largely determined by the 

 gigantic walls of Erebus (thirteen thousand feet) on 

 the east and the Lister scarp (ten to twelve thousand 

 feet) on the west. It is not safe to draw deductions 

 as to the general circulation without taking this 

 topographic factor into account. The writer remem- 

 bers a journey of only half a dozen miles on the seven- 

 teenth of April, 191 1, from Cape Evans to Glacier 



192 



