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| Titel |
Tracing the transport of colored dissolved organic matter in water masses of the Southern Beaufort Sea: relationship with hydrographic characteristics |
| VerfasserIn |
A. Matsuoka, A. Bricaud, R. Benner, J. Para, R. Sempéré, L. Prieur, S. Bélanger, M. Babin |
| 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 ; 9, no. 3 ; Nr. 9, no. 3 (2012-03-06), S.925-940 |
| Datensatznummer |
250006834
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| Publikation (Nr.) |
 copernicus.org/bg-9-925-2012.pdf |
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| Zusammenfassung |
| Light absorption by colored dissolved organic matter (CDOM)
[aCDOM(λ)] plays an important role in the heat budget of the
Arctic Ocean, contributing to the recent decline in sea ice, as well as in
biogeochemical processes. We investigated aCDOM(λ) in the
Southern Beaufort Sea where a significant amount of CDOM is delivered by the
Mackenzie River. In the surface layer, aCDOM(440) showed a strong and
negative correlation with salinity, indicating strong river influence and
conservative transport in the river plume. Below the mixed layer, a weak but
positive correlation between aCDOM(440) and salinity was observed above
the upper halocline, resulting from the effect of removal of CDOM due to
brine rejection and lateral intrusion of Pacific summer waters into these
layers. In contrast, the relationship was negative in the upper and the
lower haloclines, suggesting these waters originated from Arctic coastal
waters. DOC concentrations in the surface layer were strongly correlated
with aCDOM(440) (r2 = 0.97), suggesting that this value can be
estimated in this area, using aCDOM(440) that is retrieved using
satellite ocean color data. Implications for estimation of DOC
concentrations in surface waters using ocean color remote sensing are
discussed. |
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