VELOCITY— DAILY VARIATION. 



101 



gradient during the summer months. There is therefore no reason to doubt that the explana- 

 tion given above holds also in McMurdo Sound. 



*i-5 



♦iO 



+ro 



3 5 7 9 



Fig. 32. Daily variation of wind. 



II 13 \h 17 19 21 23 



Hours 



