INTERNATIONAL ANTARCTIC CO-OPERATION. 



CHARTS OF MEAN SEA LEVEL PRESSURE AND AIR TEMPERATURE. 



OCTOB E R 



NORMAL PRESSURE. 



MEAN PRESSURE.NOON, G.M.T. 1901. 



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



170' 160 ISO' 140* 



40' 



30' 20' 10' O' 10' 20' 30* 40' 



NORMAL AIR TEMPERATURE. 



OCTOBER 



MEAN AIR TEMPERATURE.NOON.G.M.T. 1901. 



40' ISO' 170 180 170 160 140 



5n* 10* n* IO" 2O* 3O* 40 



I4O" ISO* 160* 170' 180* 170* 160* ISO* 140' 



For explanation see Key ma.p 



