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| Titel |
Towards an improved organic carbon budget for the western Barents Sea shelf |
| VerfasserIn |
I. Pathirana, J. Knies, M. Felix, U. Mann |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 10, no. 2 ; Nr. 10, no. 2 (2014-03-21), S.569-587 |
| Datensatznummer |
250116939
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| Publikation (Nr.) |
 copernicus.org/cp-10-569-2014.pdf |
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| Zusammenfassung |
| There is generally a lack
of knowledge on how marine organic carbon accumulation is linked to vertical
export and primary productivity patterns in the Arctic Ocean. Despite the
fact that annual primary production in the Arctic has increased as a
consequence of shrinking sea ice, its effect on flux, preservation, and
accumulation of organic carbon is still not well understood. In this study, a
multi-proxy geochemical and organic-sedimentological approach is coupled with
organic facies modelling, focusing on regional calculations of carbon cycling
and carbon burial on the western Barents Shelf between northern Scandinavia
and Svalbard. OF-Mod 3-D, an organic facies modelling software tool, is used
to reconstruct and quantify the marine and terrestrial organic carbon fractions and to
make inferences about marine primary productivity changes across the marginal
ice zone (MIZ). By calibrating the model against an extensive set of sediment
surface samples, we improve the Holocene organic carbon budget for ice-free
and seasonally ice-covered areas in the western Barents Sea. The results show
that higher organic carbon accumulation rates in the MIZ are best explained
by enhanced surface water productivity compared to ice-free regions, implying
that shrinking sea ice may reveal a significant effect on the overall organic
carbon storage capacity of the western Barents Sea shelf. |
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