Ambrose Lightship 



Surface water temperatures diiring the spring months tended 

 to lag behind the means for the period of record (1937-19^5) (Bumpus, 

 1957), were equivalent during the summer, commenced to cool off more 

 quickly in late September and early October, then more aLowly in late 

 October and November, 



Minimum temperatures throughout the whole water column were 

 observed during the last third of March at less than 38°F, The thermo- 

 cline commenced development in April. Maximal tempera tiires at the sur- 

 face of 720F occurred during the first third of September and at the 

 bottom of 59°F during the last third of October and first two-thirds of 

 November. 



The surface salinity ranged from a maximum of 32.U°/00 at the 

 beginning of the year to 26.0°/00 during mid -April and gradually recover- 

 ed to 32.0°/00 at the end of the year. Bottom salinities tended to be 

 several parts per thousand salter than surface water except during the 

 fall overturn in October and November. 



5B 



