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| Titel |
Medusa-1.0: a new intermediate complexity plankton ecosystem model for the global domain |
| VerfasserIn |
A. Yool, E. E. Popova, T. R. Anderson |
| 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 ; 4, no. 2 ; Nr. 4, no. 2 (2011-05-10), S.381-417 |
| Datensatznummer |
250001660
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| Publikation (Nr.) |
 copernicus.org/gmd-4-381-2011.pdf |
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| Zusammenfassung |
| The ongoing, anthropogenically-driven changes to the global ocean are
expected to have significant consequences for plankton ecosystems in
the future. Because of the role that plankton play in the ocean's
"biological pump", changes in abundance, distribution and
productivity will likely have additional consequences for the wider
carbon cycle. Just as in the terrestrial biosphere, marine ecosystems
exhibit marked diversity in species and functional types of
organisms. Predicting potential change in plankton ecosystems
therefore requires the use of models that are suited to this
diversity, but whose parameterisation also permits robust and
realistic functional behaviour. In the past decade, advances in model
sophistication have attempted to address diversity, but have been
criticised for doing so inaccurately or ahead of a requisite
understanding of underlying processes. Here we introduce
MEDUSA-1.0
(Model of Ecosystem Dynamics, nutrient
Utilisation, Sequestration and Acidification), a
new "intermediate complexity" plankton ecosystem model that expands
on traditional nutrient-phytoplankton-zooplankton-detritus (NPZD)
models, and remains amenable to global-scale evaluation. MEDUSA-1.0
includes the biogeochemical cycles of nitrogen, silicon and iron,
broadly structured into "small" and "large" plankton size classes,
of which the "large" phytoplankton class is representative of a key
phytoplankton group, the diatoms. A full description of MEDUSA-1.0's
state variables, differential equations, functional forms and
parameter values is included, with particular attention focused on the
submodel describing the export of organic carbon from the surface to
the deep ocean. MEDUSA-1.0 is used here in a multi-decadal hindcast
simulation, and its biogeochemical performance evaluated at the global
scale. |
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