place was strengthened by the finding of higher cadmium con- 

 centrations in deep waters where mineralization of organic 

 matter takes place. 



In addition to the well-publicized distribution of PCB 

 (polychlorinated biphenyls) and DDT (dichlorodiphenyl-tri- 

 chloroethane), the presence of PAE's (phthalate ester plasti- 

 cizers) in the aquatic environment has been determined and 

 found to be widely dispersed. Concentrations of the phthalates 

 are typically 10-foId higher than that for both PCB and DDT. 



Atmospheric samples in the Samoa area were analyzed for 

 iron as an indicator of continental dust. Iron concentrations 

 here were less than those found both near Hawaii and Ber- 

 muda, in accord with their proximity to terrestrial sources. 

 Trace metals such as As, Cd, Cu, Hg, Pb, Sb, Se, and Zn are 

 associated with the fine fraction (d— 0.25ppm) of air-borne par- 

 ticulate matter that is known to have the longest residence time 

 in the atmosphere. Over half of air-borne organic carbon is 

 also associated with these fine particles, so that important 

 studies are underway to determine their source. The projects 

 in this program are listed in table 3. 



In July 1976, seven IDOE-funded scientists conducted an 

 intercalibration cruise to sample water, sediment, atmosphere, 

 plankton, and surface microlayer for both natural and synthetic 

 hydrocarbons. These samples will be used to measure chlorin- 

 ated hydrocarbon concentrations (PCB and DDT) in the sea. 



The proceedings from a workshop at Skidaway Institute 

 of Oceanography, January 1976, have been published in the 

 book Marine Pollutant Transfer. 



Pollutant Transfer Bibliography 



Duce, R. A., and E. J. Hoffman. 1976. Chemical fractionation 

 at the air/sea interface. In: Ann. Rev. Earth and Planet. 

 Sci. 4:187-228. 



150 



a: 

 ui 



< 



CD 

 O 



5 



Q 

 < 



O 



100 - 



12 3 4 



PHOSPHATE MICROMOLES/ LITER 



Figure 4. — Relation between cadmium and phosphate in 

 coastal Pacific waters. 



\oot 



Launching "MAC" from deck of RV Knorr. Air samples 

 collected over the sea by "MAC" are analyzed for light, 

 volatile, halogenated hydrocarbons 



Duce, R. A., B. J. Ray, G. L. Hoffman, and P. R. Walsh. 1976. 

 Trace metal concentration as a function of particle size 

 in marine aerosols from Bermuda. Geophys. Res. Lett. 3: 

 339-342. 



Duce, R. A., G. L. Hoffman, and W. Zoller. 1975. Atmospher- 

 ic trace metals at remote Northern and Southern Hemis- 

 phere sites: Pollution or natural? Sci. 187:59-61. 



Hoffmann, E. J., and R. A. Duce. 1976. Factors influencing 

 the organic carbon content of marine aerosols: A labora- 

 tory study. J. Geophys. Res. 81:3667-3670. 



Kester, D. R. 1975. Dissolved gases other than CO,. Chap. 8. 

 In: Chemical Oceanography 1, 2d ed. J. P. Riley and G. 

 Skirrow. ed., Acad. Press, London, p. 497-556. 



Rahn, K. A. 1976. The chemical composition of the atmospher- 

 ic aerosol. Univ. of R.I. Grad. Sch. of Oceano. Tech. Rep. 

 1 Jul. 1976, 265 p. 



Sharp, J. H., ed. 1976. Anoxia on the Middle Atlantic Shelf 

 during the summer of 1976. Rep. of workshop. Wash., 

 D. C, Oct. 15, 16, 1976, sponsored by NSF/IDOE 

 under contract OCE77-00465. Report prepared by Univ. 

 of Delaware, Nov. 1976. 



Su, C, and E. D. Goldberg. 1976. Environmental concentra- 

 tions and fluxes of some halocarbons. From: Marine 

 Pollutant Transfer, H. L. Windom and R. A. Duce (edi- 

 tors). Lexington Books, Massachusetts and Toronto, p. 

 353-374. 



Su, C. 1976. Low molecular weight halocarbons. From: Strat- 

 egies for Marine Pollution Monitoring. Ed., E. D. Gold- 

 berg. John Wiley Sons, p. 47-60. 



Wade, T. L., J. G. Quinn, T. L. Wai-ping, and C. W. Brown. 

 1976. Source and distribution of hydrocarbons in surface 

 waters of the Sargasso Sea. In: Sources, effects & sinks of 

 hydrocarbons in the aquatic environment. Proc. symp. 

 American Univ., Wash., D.C., p. 271-286. 



6 



