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Carbonate compensation dynamics

Boudreau, B.P. and Middelburg, J.J. and Meysman, F.J.R. (2010) Carbonate compensation dynamics. Geophysical Research Letters, 37, L03603-. ISSN 0094-8276.

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Official URL: http://dx.doi.org/10.1029/2009GL041847

Abstract

Carbonate saturation (zsat) and compensation (zcc) depths change with deep-ocean acidification and basification. We present simple, explicit, mechanistic formulas for the positions of these two critical depths. In particular zcc is expressed as a function of the mean dissolved carbonate ion concentration of the deep ocean, [CO3]D, the supply of dissolvable CaCO3, Fc, and the dissolution rate constant at the sediment-water interface, kc, which we show to be essentially mass-transfer controlled. Calculations reveal that zsat and zcc are today some 0.9 km apart and will rise and separate by as much as 1.7 km with acidification; conversely, if [CO3]D increases, zsat and zcc will deepen, but their separation will asymptote to 0.7 km.

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:6407
Deposited On:01 Jul 2010 02:00
Last Modified:20 Aug 2014 16:15

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