WHOLE VOL. 



LAT. 60° N. 



527 



SEA-LEVEL PRESSURE AT 10° INTERSECTIONS 



Lat. 60° N. Long. 90° E. 



950 mb. + 



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



1929 



80.9 81. G 68.8 65.4 



r.9 58.3 57.5 59.8 



64.5 69.0 



71.3 



79.9 



Mean 78.9 77.6 70.5 66.8 60.8 58.5 56.0 59.7 63.! 



67.4 72.1 67.3 



67.9 



67.3 



Lat. 60° N. Long. 100° E. 

 950 mb. + 



Date Jan. Feb. 



Mar. 



Apr. May June July Aug. Sept. Oct. Nov. Dec. Year 



59.9 



65.9 70.0 71.0 82.5 



57.3 67.8 67.6 79.6 75.5 



60.0 66.4 70.8 75.1 80.8 



63.7 66.4 67.5 67.7 68.2 



57.3 61.3 72.2 65.8 74.2 



61.9 63.8 G9.5 72.4 69.7 



56.5 63.0 67.4 75.0 86.7 

 60.2 67.5 66.8 73.5 72.5 

 58.5 62.3 65.2 75.3 81.9 

 79.0 



Mean 81.0 80.0 72.6 66.7 61.1 58.0 55.2 59.5 64.9 68.6 73.5 76.9 



69.6 



67.5 

 69.5 

 67.0 

 68.6 

 67.7 



67.9 

 68.6 

 68.2 



68.2 



