Table 3. --Continued 



STATION 68 



HUGH M. SMITH; September 4, 1959; 1505 G.c.t. (zone +6, 0905); 18°39'N., 103°59.5'W. ; sounding, 125 fm.; wind, 270°, force 

 3; temp., 83.1°F. dry, 77.1°F. wet; weather, partly cloudy; sea, slight; wire angle, 04°; BT slide No. 68A, 68B. 



Submarine irradiance and attenuation coefficients at 1353-1420 hr.: 



Wire Angle Wire Out Corrected Output Photometer Depth Depth Interval Attenuation Coefficient 

 of Detector 

 m. ua. m. m. k 



7° 

 12° 

 10° 



640 



466 



231 



184 



157 

 87.2 

 36.9 

 11.3 



5-10 

 10-20 

 20-25 

 25-29 

 29-40 

 40-49 

 49-59 

 59-64 



0.0634 



0.0702 



0.0454 



0.0398 



0.0534 



0.0956 



0.118 



0.168 



Phytoplankton: 



Depth 



100 

 150 



Chlorophyll a 



Biological Data 



Photosynthesis 



Water column: 6 mg./n 



31.6 mg. C/m. 2 /hr. 53.3 mg. C/m. 2 /day 



a) Duplicate values: 11 



0.30; 100, 2.31; 125, 2.35; 164, 2.21; 205, 2.09 (ig. at./l. 



