Ambrose Lightship 



Surface water temperatures during 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 sLowly in late 

 October and November, 



Minimvun temperatures throughout the whole water colimn were 

 observed during the last third of March at less than 38^. The therrao- 

 cline commenced development in Apin.1. Maximal temperatures at the sur- 

 face of 720? 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 narts per thousand salter than surface water except during the 

 fall overturn in October and November, 



5B 



