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| Titel |
Net community production of oxygen derived from in vitro and in situ 1-D modeling techniques in a cyclonic mesoscale eddy in the Sargasso Sea |
| VerfasserIn |
B. Mouriño-Carballido, L. A. Anderson |
| 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 ; 6, no. 8 ; Nr. 6, no. 8 (2009-08-26), S.1799-1810 |
| Datensatznummer |
250003962
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| Publikation (Nr.) |
 copernicus.org/bg-6-1799-2009.pdf |
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| Zusammenfassung |
| It has been proposed that the disagreement traditionally reported between in
vitro incubation and in situ estimates of oxygen net community production
(NCP) could be explained, at least partially, by undersampling episodic
pulses of net autotrophy associated with mesoscale dynamics. In this study
we compare in vitro incubation estimates of net community production with in
situ estimates, derived from oxygen profiles and a 1-D model, within a
cyclonic eddy investigated in the Sargasso Sea in summer 2004. The in vitro
NCP rates measured at the center of the eddy showed a shift from net
autotrophy (7±3 mmol O2 m−2 d−1) to net
heterotrophy (−25±5 mmol O2 m−2 d−1) from late June to
early August. The model-derived NCP rates also showed a temporal decline (19±6
to −3±7 and 11±8 mmol O2 m−2 d−1), but
they were systematically higher than the in vitro estimates and reported net
autotrophy or balance for the sampling period. In this comparison episodic
pulses in photosynthesis or respiration driven by mesoscale eddies can not
explain the discrepancy between the in vitro and in situ estimates of NCP.
This points to methodological artefacts or temporal or submesoscale
variability as the mechanisms responsible for the disagreement between the
techniques, at least in this dataset. |
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