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| Titel |
A new marine ecosystem model for the University of Victoria Earth System Climate Model |
| VerfasserIn |
D. P. Keller, A. Oschlies, M. Eby |
| 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 ; 5, no. 5 ; Nr. 5, no. 5 (2012-09-28), S.1195-1220 |
| Datensatznummer |
250002849
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| Publikation (Nr.) |
 copernicus.org/gmd-5-1195-2012.pdf |
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| Zusammenfassung |
| Earth System Climate Models (ESCMs) are valuable tools that can be used to
gain a better understanding of the climate system, global biogeochemical
cycles and how anthropogenically-driven changes may affect them. Here we
describe improvements made to the marine biogeochemical ecosystem component
of the University of Victoria's ESCM (version 2.9). Major changes include
corrections to the code and equations describing phytoplankton light
limitation and zooplankton grazing, the implementation of a more realistic
zooplankton growth and grazing model, and the implementation of an iron
limitation scheme to constrain phytoplankton growth. The new model is
evaluated after a 10 000-yr spin-up and compared to both the previous
version and observations. For the majority of biogeochemical tracers and
ecosystem processes the new model shows significant improvements when
compared to the previous version and evaluated against observations. Many of
the improvements are due to better simulation of seasonal changes in higher
latitude ecosystems and the effect that this has on ocean biogeochemistry.
This improved model is intended to provide a basic new ESCM model component,
which can be used as is or expanded upon (i.e., the addition of new
tracers), for climate change and biogeochemical cycling research. |
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