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| Titel |
Tuning and assessment of the HYCOM-NORWECOM V2.1 biogeochemical modeling system for the North Atlantic and Arctic oceans |
| VerfasserIn |
A. Samuelsen, C. Hansen, H. Wehde |
| 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 ; 8, no. 7 ; Nr. 8, no. 7 (2015-07-20), S.2187-2202 |
| Datensatznummer |
250116460
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| Publikation (Nr.) |
 copernicus.org/gmd-8-2187-2015.pdf |
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| Zusammenfassung |
| The HYCOM-NORWECOM (HYbrid Coordinate Ocean Model–NORWegian ECOlogical Model) modeling system is used both for basic research and as a
part of the forecasting system for the Arctic Marine Forecasting Centre
through the MyOcean project. Here we present a revised version of this
model. The present model, as well as the sensitivity simulations leading up
to this version, have been compared to a data set of in situ measurements of
nutrient and chlorophyll from the Norwegian Sea and the Atlantic sector of
the Arctic Ocean. The model revisions having the most impact included adding
diatoms to the diet of microzooplankton, increasing microzooplankton
grazing rate and decreasing the silicate-to-nitrate ratio in diatoms. Model runs
are performed both with a coarse- (~ 50 km) and
higher-resolution (~ 15 km) model configuration, both covering
the North Atlantic and Arctic oceans. While the new model formulation
improves the results in both the coarse- and high-resolution model, the
nutrient bias is smaller in the high-resolution model, probably as a result
of the better resolution of the main processes and improved circulation. The
final revised version delivers satisfactory results for all three nutrients
as well as improved results for chlorophyll in terms of the annual cycle
amplitude. However, for chlorophyll the correlation with in situ data
remains relatively low. Besides the large uncertainties associated with
observational data this is possibly caused by the fact that constant C:N-
and Chl:N ratios are implemented in the model. |
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