Nantucket Shoal Lightship 



Note: Nantucket Lightship moved at the first of the year 

 from 1;0°37 '00"N, 69°l8 '30"W, a position she had occuoied for nearly 

 three years, to l|0O33'00"N, 69°28'00"W. 



Minimum surface temperatures of 38°F were recorded in early 

 March and maximum temperatures of 70°F were recorded in mid-September. 



The whole water column was virtually isothermal during", the 

 first five months of the year. Ihe thermocline commenced development 

 in early June and reached its peak in mid-Seotember. Maximum bottom 

 temperatures occurred during the first third of November, 



Surface salinity ranged between 32°/00 and 3ij..5°/00, the 

 minimum occurring in mid-siommer and the maximum in mid-September, 

 Bottom salinities were close to the surface salinities for the first 

 two-thirds of the year but were slightly hi':;her during the autumn. 



37 



