INTERNATIONAL ANTARCTIC CO-OPERATION. 



CHARTS OF MEAN SEA LEVEL PRESSURE AND AIR TEMPERATURE. 



DECEMBER 



NORMAL PRESSURE 



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



150 160 170 ISO" 170* 160* ISO 



20 10 O 10" 2O* 30' 



NORMAL AIR TEMPERATURE. DECEMBER 



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



?" 160 170' 180 170' 160 



for expla.na.tion see Key map 



