SiP 2 



PROCEEDINGS 



OF THE 



AMERICAN PHILOSOPHICAL SOCIETY 



HELD AT PHILADELPHIA 

 FOR PROMOTING USEFUL KNOWLEDGE 



Vol. LIV August, 1915 No. 218 



THE ROLE OF THE GLACIAL ANTICYCLONE IN THE 

 AIR CIRCULATION OF THE GLOBE. 



By WILLIAM HERBERT HOBBS. 



(Read April 24, 19 15.) 



Contents. 



The fixed anticyclones above the existing continental glaciers 187 



The anticyclones as agents of glacier alimentation 187 



The northern and southern glacial anticyclones compared 187 



Thejr strophic action believed to be dependent upon an automatically 



recurring disturbance of balance between opposing forces 188 



The refrigerating air engine 188 



The lines of evidence for fixed glacial anticyclones 189 



The earlier evidence 1 89 



Confirmation in later exploration 190 



Evidence for more than one anticyclonic center above each of the greater 



areas of inland-ice 190 



Greenland 190 



Antarctica 191 



The centrifugal flow of surface air currents above the inland-ice masses. 193 



Early evidence from Greenland 193 



Later confirmation 193 



Early evidence from Antarctica 195 



Later confirmation 197 



Outward sweeping of the surface snow which falls over the central areas 



of the ice domes and its accumulation about their margins 198 



The centrifugal snow broom 198 



The sweepings below outlets 198 



Marginal accretions of snow 199 



PROC. AMER. PHIL. SOC., LIV. 2l8 M, PRINTED AUG. 4, I915. 



185 



