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| Titel |
Evaluating the ocean biogeochemical components of Earth system models using atmospheric potential oxygen and ocean color data |
| VerfasserIn |
C. D. Nevison, M. Manizza, R. F. Keeling, M. Kahru, L. Bopp, J. Dunne, J. Tiputra, T. Ilyina, B. G. Mitchell |
| 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 ; 12, no. 1 ; Nr. 12, no. 1 (2015-01-12), S.193-208 |
| Datensatznummer |
250117766
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| Publikation (Nr.) |
 copernicus.org/bg-12-193-2015.pdf |
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| Zusammenfassung |
| The observed seasonal cycles in atmospheric potential oxygen (APO) at a
range of mid- to high-latitude surface monitoring sites are compared to those
inferred from the output of six Earth system models (ESMs) participating in the fifth
phase of the Coupled Model Intercomparison Project phase 5 (CMIP5). The simulated
air–sea O2 fluxes are translated into APO seasonal cycles using a
matrix method that takes into account atmospheric transport model (ATM)
uncertainty among 13 different ATMs. Three of the ocean biogeochemistry
models tested are able to reproduce the observed APO cycles at most sites,
to within the large TransCom3-era ATM uncertainty used here, while the other
three generally are not. Net primary production (NPP) and net community
production (NCP), as estimated from satellite ocean color data, provide
additional constraints, albeit more with respect to the seasonal phasing of
ocean model productivity than overall magnitude. The present analysis
suggests that, of the tested ocean biogeochemistry models, the community ecosystem model (CESM) and
the Geophysical Fluid Dynamics Laboratory (GFDL)
ESM2M are best able to capture the observed APO seasonal cycle at both
northern and southern hemispheric sites. In most models, discrepancies with observed APO can be
attributed to the underestimation of NPP, deep ventilation or both in the
northern oceans. |
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