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Geology; June 1998; v. 26; no. 6; p. 535-538; DOI: 10.1130/0091-7613(1998)026<0535:MASOCB>2.3.CO;2
© 1998 Geological Society of America
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Magnitude and significance of carbon burial in lakes, reservoirs, and peatlands

Walter E. Dean1 and Eville Gorham2

1 U.S. Geological Survey, M.S. 980, Federal Center, Denver, Colorado 80225
2 Department of Ecology, Evolution, and Behavior, University of Minnesota, St. Paul, Minnesota 55108

Globally, lakes are currently accumulating organic carbon (OC) at an estimated annual rate of about 42 Tgmyr–1. Most of the OC in all but the most oligotrophic of these lakes is autochthonous, produced by primary production in the lakes. The sediments of reservoirs accumulate an additional 160 Tg annually, and peatlands contribute 96 Tg annually. These three carbon pools collectively cover less than 2% of the Earth's surface and constitute a carbon sink of about 300 Tgmyr–1. Although the oceans cover 71% of the Earth's surface, they accumulate OC at a rate of only about 100 Tgmyr–1.




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