PHYSICAL OCEAjSTOGBAPHY OF THE GULF OF MAINE 



533 



difference of about 5° to 6° between the two ends of the latter at all levels from 20 

 meters down to 300. 



The fact that the two eastern stations (20069 and 20077) did not differ from 

 each other by more than 2° in temperature at any depth is evidence that the cold 

 wedge that they illustrate was itself nearly uniform in temperature for a consider- 

 able distance from west to east. The difference between station 20044, on the one 

 hand, and stations 20069 and 20077, on the other, was greatest at the stratum where 

 all three were warmest — 100 to 200 meters. Below this, at depths greater than 300 

 meters, the curves for all three of these deep stations converge, the readings for all 



Temperatui-e, Centigrade 



1° 2" 3° 4° 5° 6° 7° 8° 9° 10° IT 



Fig. 11.— Vertical distribution of temperature on German Bank, March to September. A, March 23, 1920 

 tstation 20085); B, April 16, 1920 istation 20103); C, May 7, 1916 (station 10271); D, June 19, 1915 (sta- 

 tion 10290); E, August 12, 1913 (station 10095); F, August 12, 1914 (station 10244); G, September 2, 1915 

 (station 10311) 



fallmg within a range of 0.5° at 1,000 meters (station 20044,4.2°; station 20069, 

 3.77°; station 20077, 3.9°), approximately at the temperature that is typical of the 

 abyssal waters of the North Atlantic as a whole and differing little from the read- 

 ings obtained at corresponding depths and locations along the slope in summer 

 between Nova Scotia and the latitude of Chesapeake Bay (p. 605; Bigelow, 1915, 

 1917, 1922). 



Unfortunately the data are not complete for the February station on the north- 

 ern part of Georges Bank (20047) , but it is probable (hence so designated on the 



