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Source, composition and reactivity of sedimentary organic carbon in the river-dominated marginal seas: A study of the eastern Yellow Sea (the northwestern Pacific)

Title
Source, composition and reactivity of sedimentary organic carbon in the river-dominated marginal seas: A study of the eastern Yellow Sea (the northwestern Pacific)
Author
신경훈
Keywords
Yellow Sea; Sedimentary organic carbon; Suspended particulate matter; Soil organic carbon; Fossil organic carbon; Glycerol dialkyl glycerol tetraethers; GEOCHEMICAL COMPOSITIONS; OPEN-OCEAN STORAGE; GDGT-BASED PROXIES; MARINE-SEDIMENTS; DIALKYL GLYCEROL TETRAETHERS; BIT INDEX; CONTINENTAL-MARGIN; SURFACE SEDIMENTS; BOHAI SEA; PROVENANCE DISCRIMINATION
Issue Date
2016-07
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
CONTINENTAL SHELF RESEARCH, v. 125, Page. 114-126
Abstract
We investigated the source, composition and reactivity of sedimentary organic carbon (OC) in a river dominated continental marginal sea, the eastern Yellow Sea. A multi-proxy approach was applied to 9 riverbank sediments and 69 marine surface sediments, combining bulk and molecular organic parameters. The riverbank sediments (n=9) have on average low C/N ratio (4.8 +/- 0.5) and enriched delta C-13(Toc) values (-21.5 +/- 0.6%) while the BIT index is on average 0.27. The sedimentary OC in the marine surface sediments appears to have a predominantly marine origin (on average C/N ratio=7.0 +/- 0.6 and delta C-13(TOC)=-21.9 +/- 0.5%, n=69) with minor contribution of continental (i.e. soil- and lake/river-derived) OC (on average BIT index=0.00 +/- 0.01, n=69). However, the Delta C-14 values were depleted (on average - 227 +/- 53%, n=8). Accordingly, our results highlight that fossil OC, potentially derived from erosion of sedimentary bedrocks in the catchment areas and/or human activities is being contributed to the sedimentary OC pool in the eastern Yellow Sea. More work is needed to better constrain the source, composition, and age of the organic material supplied to the eastern Yellow Sea, given the lack of biogeochemical data from the Korean rivers. (C) 2016 Elsevier Ltd. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0278434316301479http://hdl.handle.net/20.500.11754/67218
ISSN
0278-4343
DOI
10.1016/j.csr.2016.07.010
Appears in Collections:
COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > MARINE SCIENCE AND CONVERGENCE ENGINEERING(해양융합공학과) > Articles
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