INTERNATIONAL ANTARCTIC CO-OPERATION. 



CHARTS OF MEAN S E.A LEVEL PRESSURE AND AIR TEMPERATURE. 



DECEMBER 



NORMAL PRESSURE 



MEAN PRESSURE, NOON, G.M.T. 1902. 



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



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



14O ISO 160 17 



NORMAL AIR TEMPERATURE. 



DECE MBER 



MEAN AIR TEMPERATURE, NOON, G.M.T. I90c.'. 



140 ISO 160* 170 ISO 170 160 150 I4O* 



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



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



a 



50' 2CT 10* 0' 10' 20' 3O* 



For expl a,na.t>ion see Key ma/p 



