1. Geochemical Markers of Organic Matter Transformation in the Eastern Laptev Sea.
- Author
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Shulga, N. A., Romankevich, E. A., Vylegzhanina, N. V., Streltsova, E. A., Fedulov, V. Yu., and Polyakova, A. V.
- Subjects
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ORGANIC compounds , *CONTINENTAL slopes , *SEDIMENTATION & deposition , *SEDIMENTS - Abstract
The sources of supply and transformation of organic matter (OM) as it transitions from dissolved form to particulate matter, fluffy layer, and bottom sediments were investigated along a meridional transect from the Lena River delta to the continental slope (in the depth range of 10 to 2390 meters, cruise 63 of the R/V Akademik Mstislav Keldysh, September 2015). The study of OM molecular markers showed that dissolved and particulate organic matter of marine and terrigenous origin biodegrades in the water column and accumulates insignificantly in bottom sediments. Thus, OM from Lena River runoff does not contribute to the formation of OM in bottom sediments in summer. An area of influence of under-ice blooms on the sedimentation process was identified on the outer shelf. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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