Balancing the Oceanic Calcium Carbonate Cycle: Consequences of Variable Water Column I
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Oui |
| Statut de publication | : | Publié |
| Année de publication | : | 2011 |
| Auteurs (2) | : | SMITH S,v GATTUSO Jean-pierre |
| Revue scientifique | : | Aquatic Geochemistry |
| Volume | : | 17 |
| Fascicule | : | 4 |
| Pages | : | 327-337 |
| DOI | : | 10.1007/s10498-010-9109-9 |
| URL | : | <go to isi>://wos:000294460900003 |
| Abstract | : | The paired chemical reactions, Ca(2+) + 2HCO(3) (-) a dagger" CaCO(3) + CO(2) + H(2)O, overestimate the ratio of CO(2) flux to CaCO(3) flux during the precipitation or dissolution of CaCO(3) in seawater. This ratio, which has been termed psi, is about 0.6 in surface seawater at 25A degrees C and at equilibrium with contemporary atmospheric CO(2) and increases towards 1.0 as seawater cools and pCO(2) increases. These conclusions are based on field observations, laboratory experiments, and equilibrium calculations for the seawater carbonate system. Yet global geochemical modeling indicates that small departures of I from 1.0 would cause dramatic, rapid, and unrealistic change in atmospheric CO(2). I can be meaningfully calculated for a water sample whether or not it is in equilibrium with the atmosphere. The analysis presented here demonstrates that the atmospheric CO(2) balance can be maintained constant with respect to seawater CaCO(3) reactions if one considers the difference between CaCO(3) precipitation and burial and differing values for psi (both < 1.0) in regions of precipitation and dissolution within the ocean. |
| Mots-clés | : | - |
| Commentaire | : | Times Cited: 2 Gattuso, Jean-Pierre/E-6631-2010 Gattuso, Jean-Pierre/0000-0002-4533-4114 Si 3 |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
Smith SV, Gattuso J-P (2011) Balancing the Oceanic Calcium Carbonate Cycle: Consequences of Variable Water Column I. Aquat Geochem 17: 327-337 | doi: 10.1007/s10498-010-9109-9
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