INTERNATIONAL ANTARCTIC CO-OPERATION. 



CHARTS OF MEAN SE.A LEVEL PRESSURE AND MR TEMPERATURE . 



DECEMBER 



NORMAL PRESSURE. 



MEAN PRESSURE, NOON, G.M.T. I9O2. 



140* I5Q* 160' 170* 160' 170' 160 ISO 140" 



40* SO' 20" 10* 0* 10* 20" 30" 40' 



40 ISO 160 170 180 170 160 150 140 



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



NORMAL AIR TEMPERATURE. 



DECE MBER 



MEAN AIR TEMPERATURE.NOON.G.MT. 1902. 



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



30* 2O" 10* O* IO" 2O" 3O" 4O" 



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



20 10* 0* 10" 20" 3O" 



For explanation see Key map 



