1953 



MAR APR MAY JUN JUL 



MAR APR MAY JUN JUL 



1947 



MAR APR MAY JUN JUL 



MAR APR MAY JUN JUL 



200 



1948 



1955 



MAR APR MAY JUN JUL 



MAR APR MAY JUN JUL 



50 



300 



1956 



MAR APR MAY JUN JUL 



1957 



1949 



HAR APR MAY JUN JUL 



1950 



150 



MAR APR MAY JUN JUL 



1958 



MAR APR MAY JUN JUL 



MAR APR MAY JUN JUL 



1959 



1951 



MAR APR MAY JUN JUL 



1952 



MAR APR MAY JUN JUL mar APR MAY JUN JUL 



I'k.i kk 21.— Number of icebergs drifting south of the 48th Parallel, monthly, 1946 

 1959. 



30 



