494 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 105 



SEA-LEVEL PRESSURE AT 10° INTERSECTIONS 



Lat. 80° N. Long. 180° 



950 mb. + 



Lat. 80° N. Long. 160° W. 

 950 mb. + 



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



1929 82.9 74.4 71.1 



1930 66.7 



1931 78.9 



1932 72.1 



1933 62.1 



1934 67.7 



1936 71.3 



1936 80.2 



1937 60.5 



1938 65.1 

 1039 



66.7 

 73.4 

 66.1 

 82.0 

 64.4 



66.1 

 86.1 

 64.6 

 70.2 



76.0 

 82.9 

 81.1 

 80.2 

 72.2 



77.6 

 71.3 

 80.5 

 64.8 



70.2 

 76.4 



78.3 

 75.0 



72.7 



82.4 

 69.9 

 69.1 

 69.8 

 70.3 



Mean 70.8 71.3 76.8 73.4 



74.3 



70.3 

 72.4 

 78.5 

 72.1 

 64.1 



77.4 

 70.0 

 71.1 



69.9 

 72.0 



75.2 



70.0 

 68.6 

 74.0 



67.4 

 65.9 



68.1 

 64.8 

 61.0 



72.3 67.3 70.6 59.7 75.6 67.6 



66.4 

 60.3 

 66.6 



64.9 

 62.0 



61.9 69.0 



66.8 

 66.0 

 61.7 

 71.3 

 75.5 



62.4 ... 67.6 



60.5 60.9 67.9 

 65.0 57.7 57.8 



60.2 



69.9 

 64.3 

 63.9 

 65.9 

 65.5 



62.2 

 73.4 

 65.3 



73.8 

 64.6 

 71.0 

 75.5 

 71.7 



70.6 

 66.8 

 71.1 



73.0 

 65.7 

 64.7 

 69.4 

 72.0 



62.1 

 76.6 



68.8 64.4 63.1 67.2 66.6 71.2 68.9 



71.8 



69.9 

 69.6 

 70.0 

 70.7 

 68.7 



69.7 

 66.8 



69.4 



