562 



BTJLLETIN OP THE BUREAU OF PISHEKIES 



(p. 626), suggests that it is not only a regular annual event but that the inflow from 

 this source is comparatively uniform, both in volume and in temperature, from year 

 to year. Its chilling effect on the surface temperature certainly extends northward 

 along the Nova Scotian slope of the gulf as far as the neighborhood of Lurcher Shoal, 

 where the whole column of water in 90 to 140 meters was about 0.4° colder on May 

 10, 1915 (station 10272), than on April 12, 1920 (station 20101)— just the reveree of 

 the seasonal change to be expected. 



s"5T "^ 



^u/y 





Oc/i A/ov; £>^c. 



^ ~- \ r^ ^ \ 





■^ °> 5T 



^pr: /^ay ^u/7e 



Fig. 31.— Mean air temperature (solid curve) and water temperature (broken curve) in Lubec Narrows, for 10-day inter- 

 vals from July 1, 1919, to June 30, 1920 



It is much to be regretted that no data are available for May for the region from 

 Cape Sable out across Browns Bank, the Eastern Channel, or the eastern end of 

 Georges Bank. Lacking such, I can not outline the effect of the Nova Scotian cur- 

 rent in this direction. Probably, however, icy water from this eastern source over- 

 flows Browns Bank at some time during April or May, perhaps the eastern end of 



