BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 

 Table 4. — Temperature and Density: Buzzards Bay, November, 1907. 



43 



Temperature station. 



Date. 



Depth in 

 fathoms. 



Air 

 temper- 

 ature. 



Surface 

 temper- 

 ature. 



Surface 

 density 

 (ati S C.). 



Bottom 

 temper- 

 ature. 



Bottom 

 density 

 (atis'C). 





Nov. ij 



...do 



...do 



3 



6 



?A 



VA 



sA 



s 



VA 



6 



7 



& l A 

 6 

 6'A 



S 

 8 



s'A 

 6'A 

 15 



7 



17 



35- 

 37- 

 34- 

 43- 

 36-0 

 35- 

 39- 

 41. 

 33- 

 4t-5 



43- 

 38-0 

 35-5 

 35- S 

 36.0 

 36.0 

 39-0 

 40.0 

 39- 

 43-0 

 40.0 



46.3 

 47-7 

 48.2 

 48.2 

 47-3 

 48. S 

 48.7 

 48. 7 

 49-2 

 48.2 

 49-7 

 49-5 

 47.2 

 48.0 

 48. S 

 48.6 

 48.7 

 47-9 

 49-7 

 49-7 

 48.7 

 49-7 



1. 0214 

 1.0228 



1. 0230 

 1.0226 

 I. 0231 



1.0236 

 1.0237 

 1.0235 

 1.0234 

 1.0237 

 1.0237 

 1.0238 

 1.0238 

 1.0238 



1.0239 



1.0238 



1. 0236 

 1.0237 

 1. 0240 

 1. 0236 

 1. 0240 



49-8 

 49-4 



50.1 



49-5 

 50.0 

 49.1 

 49-3 

 49.8 

 49.8 

 48.9 

 SO. 5 

 SO- I 



48.5 

 48.8 



49- I 

 49.I 

 50. 5 

 50.1 

 49.0 

 SO- 4 



1 0220 



B 



1.0229 





...do 







...do 







...do 







...do 







...do 







...do 







...do 





£:::::::::::::::::::::::::::::::::::::: 



..do 







...do 







Nov. 15 

 ..do 













p 



Q 



R 



S 



T 



U 



V 



...do 



...do 



..do..... 



..do 



...do 



...do 



...do 



...do 



1.023S 



1.0239 

 1. 0236 

 1.0237 



1.0236 

 1. 0240 



Mean 







38. 25 48. 30 



1. 02342 



49. 5X 



1 0-349 











November. — Temperature and density conditions at the middle of November, 1907, 

 are shown in tables 3 and 4, the temperature conditions being shown on chart 212. 

 When compared with the conditions during August, the chief facts to be noted are: 



(1) The great reduction in water temperature naturally resulting from the approach 

 of winter. The mean of all the figures is 50. 14 as against 64.9 1° during the August 

 observations. 



(2) The comparative uniformity of all the figures, the extremes being 46.3 and 

 52. 5 , showing a range of 6.2 , in place of a range of 16.5 as in August. 



(3) The exact reversal of the differences found in August. Here the surface temper- 

 atures are somewhat lower than the bottom ones (average = 49.78° and 50.47° respec- 

 tively); the Bay is colder than the Sound (average = 49.00° and 51.16°); and we meet 

 with slightly higher temperatures as we pass toward the open ocean. This last tendency 

 is not very evident in Vineyard Sound, but is quite marked in Buzzards Bay. All 

 these differences are, of course, quite intelligible. At this time of the year the air tem- 

 perature has become much colder than that of the water. It is natural, therefore, that 

 the surface of the sea should cool more rapidly than the bottom, and that the shallower, 

 more sheltered waters should cool more rapidly than the open ocean. 



