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Figure 3. — Density structure vs. eddy diffusivity. 



for automated seawater nutrient analysis systems. Ocean 

 Eng. 2:179-182. Pergamon Press. 

 Wong, G. T. F., P. G. Brewer, and D. W. Spencer. 1976. The 

 distribution of particulate iodine in the Atlantic Ocean. 

 Earth and Planet. Sci. Lett. 32 (GEOSECS Collected 

 Papers): 44 1-450. 



Pollutant Transfer Program 



In the Pollutant Transfer Program, initiated in 1972, 

 processes that transfer pollutants from land sources to the 

 oceans and movement and concentration of these pollutants 

 in the oceans are being investigated. Objectives are to: (1) 

 identify important transfer pathways and mechanisms, (2) 

 evaluate major environmental factors that influence transfer 

 processes, and (3) develop principles governing the transfer 



of pollutants. Of special interest are the concentration and 

 dispersal of pollutants at the air-sea interface, movement of 

 pollutants through estuaries to continental shelf waters, deposi- 

 tion of pollutants in sediments, and the chemical form and 

 degradation of these pollutants in the marine environment. 



The atmosphere is a major route of transfer for chlorinated 

 and petroleum hydrocarbons and trace metals. Results of 

 studies on atmospheric transfer of trace metals suggest that, 

 except for sea salts, most airborne trace metals over the open 

 ocean and Antarctica are from normal weathering of the earth's 

 crust. However, the concentrations of several easily vaporized 

 trace metals (antimony, cadmium, copper, lead, selenium, and 

 zinc) are greater than those predicted to be of crustal origin. 



A highly significant relation was found between cadmium 

 and phosphate in coastal Pacific waters (fig. 4). The correla- 

 tion indicates that cadmium is taken up by phytoplankton 

 along with nutrients. The possibility of this mechanism taking 



