PHYSICAL OCEANOGBAPHY OF THE GULF OF MAINE 



673 



Harbor, which opens freely 

 to the deeps oflF Massachu- 

 setts Bay, is 0.05° to 1° warmer 

 than the more inclosed waters 

 of Woods Hole in winter, 

 although a degree of latitude 

 farther north and bordering a 

 colder ocean area (Bigelow, 

 1915, p. 257). Gloucester 

 Harbor, in turn, is colder than 

 the neighboring parts of Mas- 

 sachusetts Bay. For example, 

 the surface temperature of 

 the outer part of the harbor 

 fell to about 0.5° to 1.1° dur- 

 ing the winter of 1912-13, 

 but the lowest reading a few 

 miles outside was 2.78° (Bige- 

 low, 1914a). Boothbay Har- 

 bor, 75 miles north of Glou- 

 cester and shut in by numerous 

 islands, is likewise colder in 

 winter than are the neighbor- 

 ing waters of the open gulf. 

 OnMarch 4, 1920, for instance, 

 the temperature of the harbor 

 was fractionally below 0° (fig. 

 30), at which date the ^Z6afross 

 had surface readings of 2.2° to 

 1.1° on the run in to the land 

 there from a station some 35 

 miles offshore (20057). In- 

 formation to the same effect re- 

 sults from an average March 

 temperature of about 0.11° at 

 the Bureau of Fisheries station 

 at the head of Boothbay Har- 

 bor for March, 1881 to 1885, 

 contrasting with 1.1° to 1.7° at 

 Seguin Island (Rathbun, 1887). 

 Finally, a graph (fig. 90) is 

 offered to show the thermal 

 progression of aii- and water in 

 Massachusetts Bay during the 

 winter of 1924 and 1925. 



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