Abstract:
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.
