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| Titel |
Modeling ocean circulation and biogeochemical variability in the Gulf of Mexico |
| VerfasserIn |
Z. Xue, R. He, K. Fennel, W.-J. Cai, S. Lohrenz, C. Hopkinson |
| 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 ; 10, no. 11 ; Nr. 10, no. 11 (2013-11-12), S.7219-7234 |
| Datensatznummer |
250085410
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| Publikation (Nr.) |
 copernicus.org/bg-10-7219-2013.pdf |
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| Zusammenfassung |
| A three-dimensional coupled physical-biogeochemical model is applied to
simulate and examine temporal and spatial variability of circulation and
biogeochemical cycling in the Gulf of Mexico (GoM). The model is driven by
realistic atmospheric forcing, open boundary conditions from a data
assimilative global ocean circulation model, and observed freshwater and
terrestrial nitrogen input from major rivers. A 7 yr model hindcast
(2004–2010) was performed, and validated against satellite observed sea
surface height, surface chlorophyll, and in situ observations including
coastal sea level, ocean temperature, salinity, and dissolved inorganic
nitrogen (DIN) concentration. The model hindcast revealed clear seasonality
in DIN, phytoplankton and zooplankton distributions in the GoM. An empirical
orthogonal function analysis indicated a phase-locked pattern among DIN,
phytoplankton and zooplankton concentrations. The GoM shelf nitrogen budget
was also quantified, revealing that on an annual basis the DIN input is
largely balanced by the removal through denitrification (an equivalent of
~ 80% of DIN input) and offshore exports to the deep ocean
(an equivalent of ~ 17% of DIN input). |
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