INTERNATIONAL ANTARCTIC CO-OPERATION. 



CHARTS OF MEAN SEA LEVEL PRESSURE AND AIR TEMPERATURE. 



DECEMBER 



NORMAL PRESSURE. 



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



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



30' 2O' !0" 0* 10' 2O" 30' 40* 



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



30' 20' 10' 0* 10" 20" 30" 



NORMAL AIR TEMPERATURE. 



DEC EMBER 



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



140' ISO* 160* 170* ISO* 170* 160 150 140' 



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



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



' 



N 



3O* 20 10* O* 10" 20" 3O" 



For explaneut/ion see Key map 



