INTERNATIONAL ANTARCTIC CO-OPERATION. 



CHARTS OF MEAN SEA LEVEL PRESSURE AND AIR TEMPERATURE 



FEBR U ARY 



NORMAL PRESSURE 



MEAN PRESSURE, NOON, G.M.T. 1904. 



NORMAL AIR TEMPERATURE. 



FEBRUARY 



MEAN AIR TEMPERATURE, NOON, G.M.T. 1904 . 



140" ISO* ISO* 170" 180' 170' 160 150 



3O" 20" 10" O" 



I4O" 150 160" 170" 160" 170 160 ISO" 



SO* 2O* 



O" 10" 20" 30 



For expl ana.tion see Key ma/p 



