24.0 23.0 22.0 



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SEP NOV JAN MAR MAY JUL SEP NOV JAN MAR MAY JUL SEP NOV JAN MAR MAY JUL SEP NOV JAN MAR MAY JUL SEP NOV JAN MAR MAY JUL SEP NOV JAN MAR MAY JUL SEP NOV 



JAN MAR MAY 

 1973 



Figure 5.-Monthl.v average depth (m) of selected isotherms CC) versus time at Ocean Station ECHO, Sep- 

 tember 1966-Aprll 1978. 



13 



