502 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 105 



SEA-LEVEL PRESSURE AT 10° INTERSECTIONS 



Lat. 80° N. Long. 60° E. 



950 mb. + 



Mean 58.8 58.4 65.3 64.7 65.0 61.0 61.9 61.4 59.2 57.8 58.7 60.0 



61.0 



Lat. 80° N. Long. 70° 

 950 mb. + 



E. 



Date Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Year 



62.7 65.0 62.0 56.1 61.6 64.8 64.9 



67.5 67.8 62.7 



59.4 62.0 58.2 



62.9 58.4 53.7 



58.1 ... 66.0 



62.3 64.4 71.7 



57.8 59.4 62.3 



63.2 63.1 51.7 



64.4 57.9 52.5 

 53.1 54.2 



61.7 

 49.5 

 59.3 

 53.8 

 56.5 



59.2 

 54.4 



53.9 67.5 63.0 



65.5 54.5 61.6 



56.1 60.5 59.6 



63.7 58.7 63.3 



58.8 62.2 59.7 



63.8 61.9 



53.1 51.3 61.0 



60.0 68.2 60.2 



63.8 



62.0 61.2 59.5 57.5 69.6 61.9 61.4 



