Mean Temperature and Density Curves 81 
Monthly mean surface water temperatures (in degrees Celsius) and densities 
(0,5) are presented graphically to show the seasonal variation. 
Temperatures —-——-— Densities 
JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEPT. OCT. NOV. DEC. ene ec JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEPT. OCT. NOV. DEC. 
715 
FRIDAY HARBOR, SAN JUAN ISLAND, WASH. ie eal 
SEWARD, ALASKA 
NEpESI 
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