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| Titel |
Numerical simulations of oceanic oxygen cycling in the FAMOUS Earth-System model: FAMOUS-ES, version 1.0 |
| VerfasserIn |
J. H. T. Williams, I. J. Totterdell, P. R. Halloran, P. J. Valdes |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 7, no. 4 ; Nr. 7, no. 4 (2014-07-15), S.1419-1431 |
| Datensatznummer |
250115661
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| Publikation (Nr.) |
 copernicus.org/gmd-7-1419-2014.pdf |
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| Zusammenfassung |
| Addition and validation of an oxygen cycle to the ocean component of the
FAMOUS climate model are described. At the surface, FAMOUS overestimates
northern hemisphere oxygen concentrations whereas, at depth, the southern
hemisphere values are too low. Surface validation is carried out with respect
to HadGEM2-ES where, although good agreement is generally found,
discrepancies are mainly attributed to disagreement in surface temperature
structure between the models. The disagreement between the models at depth in
the Southern Hemisphere is attributed to a combination of excessive surface
productivity in FAMOUS' equatorial waters (and its concomitant effect on
remineralisation at depth) and its reduced overturning circulation compared
to HadGEM2-ES. For the Atlantic basin FAMOUS has a circulation strength of
12.7 ± 0.4 Sv compared to 15.0 ± 0.9 for HadGEM2-ES. Global-
and basin-scale decomposition of meridional overturning circulation, oxygen
concentration and apparent oxygen utilisation (AOU) – a measure of the
departure from equilibrium with the atmosphere – allows specific features of
the climatology to be assigned to particular basins. For example, the global
signal in overestimation of low-latitude Northern Hemisphere oxygen at
intermediate depths is attributed to the Pacific. In addition, the inclusion
of the AOU analysis enables explanation of oxygen-deficient deep water in the
Southern Hemisphere which is not seen in the Northern Hemisphere. |
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