520 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 105 



SEA-LEVEL PRESSURE AT 10° INTERSECTIONS 



Lat. 60° N. Long. 120° W. 



950 mb. + 



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



1929 



1930 

 1931 

 1932 

 1933 

 1934 



1936 

 1936 

 1937 

 1938 

 1939 



76.5 72.2 



81.3 

 61.2 

 64..') 

 61.6 

 64.1 



73.8 

 75.5 

 72.6 

 67.9 

 64.3 



62.4 

 60.2 

 64.0 

 71.0 

 69.5 



66.0 

 81.0 

 64.6 

 77.7 

 73.5 



62.5 



64.7 

 73.0 

 75.4 

 69.4 

 71.4 



68.9 

 65.5 

 71.9 

 59.6 

 68.6 



65.2 07.9 62.2 61.5 62.3 67.1 59.3 66.9 68.2 



64.5 65.1 61.3 

 64.3 64.5 61.4 



65.6 61.8 62.1 

 68.0 62.4 62.3 

 64.9 61.5 63.1 



68.9 

 69.1 

 59.7 

 65.1 

 65.3 



66.2 

 62.9 

 61.8 

 63.1 

 61.6 



61.2 

 62.0 

 60.9 

 62.1 

 65.0 



62.9 

 62.2 

 60.1 

 62.5 

 62.1 



62.1 

 61.4 

 62.3 

 63.5 



63.5 

 64.9 

 59.6 

 62.3 

 65.4 



02.2 

 64.4 

 59.5 

 63.3 



63.2 

 60.8 

 61.4 

 57.7 

 66.6 



64.6 

 65.2 

 66.0 

 61.2 



65.3 

 57.5 

 65.1 

 67.2 

 60.8 



66.5 

 65.7 

 61.8 

 61.3 



63.9 

 62.5 

 66.4 

 68.1 

 62.7 



71.8 

 66.2 

 70.3 

 64.6 



59.6 

 59.8 

 65.1 

 76.0 

 68.9 



68.1 

 65.7 

 72.7 

 64.7 



Mean 69.4 69.3 68.3 65.5 63.5 62.1 62.1 62.7 63.4 63.1 66.3 66.9 



66.0 



64.8 

 62.7 

 64.3 

 65.7 

 65.1 



66.7 

 67.1 

 65.3 

 64.6 



65.2 



Lat. 60° N. Long. 110° W. 

 950 mb. + 



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



1929 



1930 

 1931 

 1932 

 1933 

 1934 



1935 

 1936 

 1937 

 1938 

 1989 



73.7 70.0 62.6 66.3 67.9 



75.2 

 63.5 

 66.7 

 63.2 

 65.8 



73.7 

 75.7 

 71.8 

 68.7 

 65.6 



62.9 

 61.2 

 63.2 

 68.5 

 70.6 



66.4 

 79.8 

 66.0 

 77.4 

 73.1 



64.7 

 74.8 

 75.4 

 70.5 

 71.8 



69.1 

 65.4 

 75.9 

 62.3 

 70.5 



65.7 

 64.8 

 69.7 

 69.2 

 65.8 



69.9 

 69.6 

 62.1 

 66.3 

 65.6 



65.6 

 65.9 

 62.9 

 66.0 

 63.6 



68.7 

 67.8 

 62.6 

 64.1 

 63.7 



00.6 



58.1 

 61.6 

 62.3 

 62.1 

 62.4 



62.3 

 65.3 

 60.6 

 61.9 

 65.8 



60.1 61.5 64.8 60.2 64.5 67.6 



66.0 



Mean 69.4 69.0 69.4 66.8 65.3 62.1 



Lat. 60° N. Long. 100= 

 950 mb. + 



W. 



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



1929 



1936 

 1936 

 1937 

 1988 

 1939 



67.4 65.5 63.2 68.0 66.7 59.0 57.3 59.3 62.3 59.9 62.6 65.8 



1930 68.4 



1981 63.7 



1932 69.2 



1938 63.4 



1934 66.3 



72.6 

 71.5 

 08.5 

 00.8 

 65.0 



64.3 

 64.2 

 64.6 

 65.6 

 09.8 



05.4 

 74.7 

 67.1 

 70.0 

 08.5 



65.7 

 76.3 

 73.6 

 73.1 

 68.5 



69.1 

 64.2 

 76.2 

 62.5 

 71.0 



66.3 64.9 55.8 



63.8 67.2 59.8 



74.0 65.7 63.9 



71.2 69.8 63.2 



66.3 67.3 63.9 



72.4 

 67.5 

 67.4 

 67.4 

 66.2 



73.1 

 68.0 

 65.1 

 65.3 

 67.2 



63.9 

 64.3 

 61.5 

 62.1 

 65.4 



58.2 

 57.9 

 63.4 

 60.5 

 61.1 



60.7 

 62.3 

 60.9 

 61.5 

 60.6 



59.7 60.0 



62.4 62.5 



59.7 59.0 



61.6 58.7 



61.6 

 60.8 

 59.9 

 58.9 

 64.6 



01.7 

 60.4 

 63.5 

 62.4 



64.4 

 61.2 

 63.5 

 67.3 

 63.7 



61.6 

 61.8 

 66.9 

 68.9 

 68.0 



60.5 

 64.0 

 62.1 

 71.8 

 08.7 



63.6 07.9 09.4 



04.7 65.0 66.7 



64.6 72.2 72.0 



59.7 03.1 00.8 



Mean 67.5 G7.8 69.4 68.2 67.3 62.1 60.2 60.6 61.6 63.3 66.8 66.2 



63.1 



62.7 

 63.6 

 65.6 

 66.3 

 65.7 



66.6 

 66.0 

 66.4 

 63.9 



65.0 



