PERCENT TRANSMISSION 







10 - 



20- 

 DEPTH, 



IN 30- 

 METERS - 



40- 

 50- 



A 



B 



C 



D 



oo 



— r— I — r 



2 



I 



0.5 



T 1— 



0.2 







ATTENUATION COEFFICIENT 

 ioC) 



Fi^tre 6.— Idealized li^ht attenuation profile derived from transmissometer profiles recognized in the Alaskan Beaufort Sea, during the 

 summer, 1971. Zone A represents ice melt water. Zone B. river runoff. Zone C typifies the light attenuation in arctic surface water, and 

 Zone D shows the turhid layer which develops over the bottom on the shelf. 



201 



