Trace metals in sediments from the inner continental shelf of the western Beaufort Sea |
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| Authors: | Eric A Crecelius John H Trefry Margarete S Steinhauer Paul D Boehm |
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| Institution: | (1) Battelle Pacific Northwest Laboratories, 439 West Sequim Bay Road, 98382 Sequim, Washington, USA;(2) Department of Oceanography & Ocean Engineering, Florida Institute of Technology, 32901 Melbourne, Florida, USA;(3) Battelle Ocean Sciences, 397 Washington Street, 02332 Duxbury, Massachusetts, USA;(4) Arthur D. Little, Inc., 25 Acorn Park, 02140 Cambridge, Massachusetts, USA |
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| Abstract: | Increased development and changing climate have enhanced global interest in the Arctic Ocean and adjacent seas. Using a large, 3-yr data base, we have determined the distribution of trace metals in sediments from the inner shelf of the western Beaufort Sea. Metal concentrations in these sediments reflect pristine conditions, consistent with those for most coastal areas in the Arctic and with predictions based on average continental crust. Geographic variations in metal values are primarily related to sediment grainsize distribution. However, grain-size patterns are a complex function of several variables including source areas, ice and water movement, as well as physical and chemical weathering. Future identification of any metal contamination in Beaufort Sea sediments will be simplified by understanding the predictable natural patterns. |
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