Mathematics – Logic
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007gbioc..21.2010r&link_type=abstract
Global Biogeochemical Cycles, Volume 21, Issue 2, CiteID GB2010
Mathematics
Logic
1
Geochemistry: Geochemical Cycles (0330), Global Change: Biogeochemical Cycles, Processes, And Modeling (0412, 0414, 0793, 4805, 4912), Global Change: Earth System Modeling (1225), Oceanography: Biological And Chemical: Biogeochemical Cycles, Processes, And Modeling (0412, 0414, 0793, 1615, 4912)
Scientific paper
An ``anthrobiogeochemical'' copper cycle, from Earth's core to the Moon, combining natural biogeochemical and human anthropogenic stocks and flows is derived for the mid-1990s. Although some aspects of the quantification have moderate to high uncertainty, the anthropogenic mining, manufacturing, and use flows (on the order of 104 Gg Cu/yr) clearly dominate the cycle. In contrast, the natural repositories of Earth's core, mantle, and crust, and of the Moon, hold much higher stocks of copper (>1010 Gg) than do anthropogenic repositories (<106 Gg). The results indicate that the present anthropogenic rate of copper extraction exceeds the natural rate of renewal by ~106.
Graedel Thomas E.
Rauch J. N.
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