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| Titel |
Assessing the potential long-term increase of oceanic fossil fuel CO2 uptake due to CO2-calcification feedback |
| VerfasserIn |
A. Ridgwell, I. Zondervan, J. C. Hargreaves, J. Bijma, T. M. Lenton |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 4, no. 4 ; Nr. 4, no. 4 (2007-07-06), S.481-492 |
| Datensatznummer |
250001848
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| Publikation (Nr.) |
 copernicus.org/bg-4-481-2007.pdf |
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| Zusammenfassung |
| Plankton manipulation experiments exhibit a wide range of sensitivities of
biogenic calcification to simulated anthropogenic acidification of the
ocean, with the "lab rat" of planktic calcifiers, Emiliania huxleyi apparently not
representative of calcification generally. We assess the implications of
this observational uncertainty by creating an ensemble of realizations of an
Earth system model that encapsulates a comparable range of uncertainty in
calcification response to ocean acidification. We predict that a substantial
reduction in marine carbonate production is possible in the future, with
enhanced ocean CO2 sequestration across the model ensemble driving a
4–13% reduction in the year 3000 atmospheric fossil fuel CO2 burden.
Concurrent changes in ocean circulation and surface temperatures in the
model contribute about one third to the increase in CO2 uptake. We find
that uncertainty in the predicted strength of CO2-calcification
feedback seems to be dominated by the assumption as to which species of
calcifier contribute most to carbonate production in the open ocean. |
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