INTERNATIONAL ANTARCTIC CO-OPERATION. 



CHARTS OF MEAN SEA LEVEL PRESSURE AND AIR TEMPERATURE. 



DECEMBER 

 NORMAL PRESSURE. M EAN PRESSURE, N DON, G.M.T. I 9O 3 . 



140* ISO' 160' 170' ISO' 170* I6tf 180' 140' 



30" 20' 10' O* ID' 20' 30- 40' 



140' ISO' 160* 170' 180* 170' 160 ISO* 140' 





40" 3O* 20* 10" 0' 10' SO' 30' 40' 



NORMAL AIR TEMPERATURE. 



DECEMBER 



MEAN AIR TEMPERATURE,NOON, G.M.T. 1903 . 



80' 170 160 



40" JO" 20 10' O' 10' 2O' 30' O 



O' 30" 20 10 O 10" 20 3D 40 



For explanation see Key map 



