Technical Comments

Response to Comment on "Physical Model for the Decay and Preservation of Marine Organic Carbon"

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Science  21 Mar 2008:
Vol. 319, Issue 5870, pp. 1616
DOI: 10.1126/science.1148678

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Fast enzyme deactivation rates are not required by our physical model of organic matter decay. Instead, low effective diffusivities arising from sorption of enzymes and physical protection by minerals are sufficient. Our model predicts observed temporal trends in organic-matter decay rather than specific rate constants. Existing statistical models of intrinsic reactivity explain observed trends empirically but not theoretically.

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