Radiocarbon constraint on relict organic carbon contributions to Ross Sea sediments
Citable URI
https://hdl.handle.net/1912/984As published
https://doi.org/10.1029/2005GC001097DOI
10.1029/2005GC001097Keyword
Ross Sea; Radiocarbon; Sediment; Organic carbonAbstract
We estimate the relative contribution of relict organic matter to the acid-insoluble organic carbon
(AIOC) fraction of surface sediments from Ross Sea, Antarctica, on the basis of 14C abundance. The bulk
isotopic characteristics of AIOC can largely be explained by simple two-source models of modern and
relict organic carbon, when samples are grouped according to two geographical regions, namely,
southwestern and south central Ross Sea. This spatial variability in relict organic carbon could be
controlled by proximity to the edge of the Ross Ice Shelf and ice drainage areas. Radiocarbon abundance in
the AIOC is potentially an excellent tool to estimate the contribution of relict organic carbon in the
Antarctic margin sediments.
Description
Author Posting. © American Geophysical Union, 2006. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geochemistry Geophysics Geosystems 7 (2006): Q04012, doi:10.1029/2005GC001097.
Collections
Suggested Citation
Article: Ohkouchi, Naohiko, Eglinton, Timothy I., "Radiocarbon constraint on relict organic carbon contributions to Ross Sea sediments", Geochemistry Geophysics Geosystems 7 (2006): Q04012, DOI:10.1029/2005GC001097, https://hdl.handle.net/1912/984Related items
Showing items related by title, author, creator and subject.
-
Transfer of organic carbon through marine water columns to sediments – insights from stable and radiocarbon isotopes of lipid biomarkers
(Copernicus Publications on behalf of the European Geosciences Union, 2014-12-10)Compound-specific 13C and 14C compositions of diverse lipid biomarkers (fatty acids, alkenones, hydrocarbons, sterols and fatty alcohols) were measured in sinking particulate matter collected in sediment traps and from ... -
Timescales of lateral sediment transport in the Panama Basin as revealed by radiocarbon ages of alkenones, total organic carbon and foraminifera
(2009-12)Paired radiocarbon measurements on haptophyte biomarkers (alkenones) and on cooccurring tests of planktic foraminifera (Neogloboquadrina dutertrei and Globogerinoides sacculifer) from late glacial to Holocene sediments ... -
The radiocarbon age of organic carbon in marine surface sediments
(2010-08)Long-term carbon cycling and climate change are strongly dependent on organic carbon (OC) burial in marine sediments. Radiocarbon (14C) has been widely used to constrain the sources, sinks, and processing of sedimentary ...
