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| Titel |
Sensitivity analysis of an ocean carbon cycle model in the North Atlantic: an investigation of parameters affecting the air-sea CO2 flux, primary production and export of detritus |
| VerfasserIn |
V. Scott, H. Kettle, C. J. Merchant |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 7, no. 3 ; Nr. 7, no. 3 (2011-06-06), S.405-419 |
| Datensatznummer |
250004650
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| Publikation (Nr.) |
 copernicus.org/os-7-405-2011.pdf |
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| Zusammenfassung |
| The sensitivity of the biological parameters in a
nutrient-phytoplankton-zooplankton-detritus (NPZD) model in the calculation
of the air-sea CO2 flux, primary production and detrital export is
analysed. We explore the effect on these outputs of variation in the values
of the twenty parameters that control ocean ecosystem growth in a 1-D
formulation of the UK Met Office HadOCC NPZD model used in GCMs. We use and
compare the results from one-at-a-time and all-at-a-time perturbations
performed at three sites in the EuroSITES European Ocean Observatory Network:
the Central Irminger Sea (60° N 40° W), the Porcupine Abyssal
Plain (49° N 16° W) and the European Station for Time series in
the Ocean Canary Islands (29° N 15° W). Reasonable changes to the
values of key parameters are shown to have a large effect on the calculation
of the air-sea CO2 flux, primary production, and export of biological
detritus to the deep ocean. Changes in the values of key parameters have a
greater effect in more productive regions than in less productive areas. The
most sensitive parameters are generally found to be those controlling
well-established ocean ecosystem parameterisations widely used in many
NPZD-type models. The air-sea CO2 flux is most influenced by variation in
the parameters that control phytoplankton growth, detrital sinking and
carbonate production by phytoplankton (the rain ratio). Primary production is
most sensitive to the parameters that define the shape of the
photosynthesis-irradiance curve. Export production is most sensitive to the
parameters that control the rate of detrital sinking and the remineralisation
of detritus. |
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