Aspects of the Surface Distributions of Copper, Nickel, Cadmium, and Lead in the North Atlantic and North Pacific
The concentrations of copper, nickel, and cadmium have been determined on over 400 surface samples; 10 samples were also analyzed for lead. Nickel and cadmium are closely associated with nutrient distributions, being low (about 2 nmol kg−1 for Ni and less than 20 pmol kg−1 for Cd) in the central gyres and elevated to 3–3.5 nmol kg−1 (Ni) and 40–80 pmol kg−1 (Cd) in the equatorial eastern Pacific and in the cool eastern boundary currents. There are large regional variations in their element-nutrient correlations, however. Copper is slightly elevated in cool eastern boundary waters (1.3 nmol kg−1) relative to North Pacific and South Atlantic central gyres, but the Sargasso Sea has higher copper concentrations (1.4 nmol kg−1) than the other central gyres. Copper concentrations in coastal waters of the Gulf of Panama are elevated to 3–4 nmol kg−1; this coastal water advects seaward and creates ‘events’ of high — Cu waters in the oceanic interior. Lead concentrations in the North Atlantic (100–250 pmol kg−1) are higher than in the North Pacific.
KeywordsEarth Planet Lead Concentration Gulf Stream Surface Distribution High Copper Concentration
Unable to display preview. Download preview PDF.
- 2.Bender, M.L. and C.L. Gagner, 1976: Dissolved copper, nickel and cadmium in the Sargasso Sea. J. Mar. Res. 34, 327–339.Google Scholar
- 3.Boyle, E.A., R. Sclater and J.M. Edmond, 1976: On the marine geochemistry of cadmium. Nature 263, 42–44.Google Scholar
- 9.Martin, J.H., K.W. Bruland and W.W. Broenkow, 1976: Cadmium transport in the California Current. In: “Marine Pollutant Transfer”, H. Windom and R. Duce, eds. Lexington Books, Lexington, pp. 159–184.Google Scholar
- 10.Measures, C.I., R.E. McDuff and J.M. Edmond, 1980: Selenium redox chemistry at GEOSECS I. Earth and Planetary Science Letters in press.Google Scholar
- 13.Schaule, B. and C. Patterson, 1977: The Occurence of lead in the Northeast Pacific. In: “Proceedings of an international experts discussion of lead”, M. Branica, ed. Pergamon, Oxford.Google Scholar
- 14.Boyle, E.A., S.S. Huested and S. Jones, 1981: On the distribution of Cu, Ni and Cd in the surface waters of the North Atlantic and North Pacific Ocean. J. Geophys. Res., 86, C10, 9844–58.Google Scholar
- 16.Boyle, E.A. and J.M. Edmond, 1975: Determination of trace metals in aqueous solution by APDC chelate co-precipitation. In: “Analytical Methods of Oceanography”, T.R. Gibb, ed. Advances in Chemistry Series #147, pp 44–55.Google Scholar