Radiocarbon constraint on relict organic carbon contributions to Ross Sea sediments

Radiocarbon constraint on relict organic carbon contributions to Ross Sea sediments
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罗斯海沉积物残余有机碳贡献的放射性碳限制

DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
T. Eglinton
T. Eglinton
中科院分区：
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文献类型：
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作者：
N. Ohkouchi;T. Eglinton

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根据14C丰度估算了南极罗斯海表层沉积物中残余有机质对酸不溶性有机碳（AIOC）的相对贡献。AIOC的大量同位素特征在很大程度上可以通过现代和残余有机碳的简单双源模型来解释，当样品根据两个地理区域进行分组时，即罗斯海西南部和中南部。这种残留有机碳的空间变异性可以通过接近罗斯冰架和冰排水区的边缘来控制。AIOC中的放射性碳丰度可能是一个很好的工具，以估计残留有机碳在南极边缘沉积物中的贡献。
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.