WHOLE VOL. 



LAT. 80° N. 



499 



SEA-LEVEL PRESSURE AT 10° INTERSECTIONS 



Lat. 80° N. Long. 30° W. 



950 mb. + 



Mean 62.3 63.2 70.4 73.1 71.2 



S.4 65.3 62.6 64.2 62.9 62.0 61.5 



65.4 



Lat. 80° N. Long. 20° 

 950 mb. + 



W. 



Mean 60.9 61.8 69.o 72.1 70.3 65.7 64.9 62.5 63.7 62.0 61.0 60.4 64.6 



Mean 59.1 66.0 68.2 70.7 68.4 64.9 64.4 62.1 62.7 60.5 59.7 69.0 63.8 



