Articles | Volume 13, issue 17
https://doi.org/10.5194/bg-13-5003-2016
https://doi.org/10.5194/bg-13-5003-2016
Research article
 | 
09 Sep 2016
Research article |  | 09 Sep 2016

Fate of terrigenous organic matter across the Laptev Sea from the mouth of the Lena River to the deep sea of the Arctic interior

Lisa Bröder, Tommaso Tesi, Joan A. Salvadó, Igor P. Semiletov, Oleg V. Dudarev, and Örjan Gustafsson

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Cited articles

Aller, R. C. and Blair, N. E.: Carbon remineralization in the Amazon-Guianas tropical mobile mudbelt: A sedimentary incinerator, Cont. Shelf Res., 26, 2241–2259, 2006.
Belicka, L. L., Macdonald, R. W., Yunker, M. B., and Harvey, H. R.: The role of depositional regime on carbon transport and preservation in Arctic Ocean sediments, Mar. Chem., 86, 65–88, 2004.
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Boetius, A. and Damm, E.: Benthic oxygen uptake, hydrolytic potentials and microbial biomass at the Arctic continental slope, Deep-Sea Res. Pt. I, 45, 239–275, 1998.
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Short summary
Thawing permafrost may release large amounts of terrestrial organic carbon (TerrOC) to the Arctic Ocean. We assessed its fate in the marine environment with a suite of biomarkers. Across the Laptev Sea their concentrations in surface sediments decreased significantly and showed a trend to qualitatively more degraded TerrOC with increasing water depth. We infer that the degree of degradation of TerrOC is a function of the time spent under oxic conditions during protracted cross-shelf transport.
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