Savannah li^htshiD 



S\irface water temperatures at Savannah lightship exliibited 

 littl-:' 'departure from the mean for the neriod of" record except for a 

 warm March, slow April, cold last two-thirds of Movember and warm De- 

 cember . 



Minimum temperatures of approximately kQ°y apparently occurred 

 in January (Observations did not start at this station until 18 January) 

 and reached a maximum at the surface of less than B^^F in mid-Au^^ust, 

 and a maximum at the bottom of 8U°F at the same time. The water was 

 nearly isothermal at this shallow station throughout the year, seldom 

 having a gradient, surface to bottcm ([|8 feet) of greater than 2°F. Ex- 

 ceptions occurred in May when the surface warmed un temporarily ahead 

 of the under lyj.n" water. 



The surface salinity was depressed, March - June to anproxi- 

 mately 3U /oo, increased to 36°/oo in July, gradually ieclined to 3l5°/oo 

 at year end. Bottom saliji5.ty was slightly greater than the surface 

 salinity diu^inr; the first half of the year, but vjas essentially identi- 

 cal during the second half. 



Figure 18. Savannah Li-htshin, 1956. (Dashed line in upper dia.^ram, mean for period 

 19 h 7 -19 55) 



225 



