Diamond Shoals Lightship (Figure 15, Table 15) 



In discussing the 1956 observations Bunpus explained the unique 

 hydrographic conditions which prevail at this station and the reader is 

 referred to his remarks (Bumpus, 1957, b.) 



Ten day means of surface temperature from Jaiuary through March 

 are slightly above the mean for 1923-19^6 and indicate less frequent pene- 

 trations of cold coastal water across Diamond Shoals than occurred in 

 19$6. From April throiigh September temperatures are more uniform and 

 stay above the mean and above the 19^6 readings. Except for October, 

 temperatures stayed high throughout the fall and early winter. 



In terms of daily observations, the surface temperature range 

 was from i4l|°-8U°Fj bottom temperature froiu 56°-8l°F. 



The progressive plot of 10 day means shows 1957 to be appre- 

 ciably warmer at all depths than was 1956. 



Surface salinity ranged from 36.3 °/oo to 32.5 °/oo; bottom 

 salinity from 36.5 °/oo to 3U«2. 



From late June to late September surface and bottom salinities 

 remained quite uniform and close together. 



93 



