The Concentration and Carbon Isotopic Composition of Dissolved Organic Carbon in Deep Sea Pore Waters

已经开发了一个分析系统和取样程序 对于孔隙水DOC的测定，使用修改的 高温铂催化氧化法 Sugimura and Suzuki（1988）. 这种方法采用 色谱CO2分离，并允许通过 火焰离子化检测或换句话说，分离DOC 二氧化碳同位素分析。 这些方法测量孔隙 陆架水体剖面和底栖生物溶解有机碳通量 来自北大西洋西部的边缘沉积物， 提供一组孔隙水13 C（DOC）测定结果 从相同的核心。 两项海底碳循环研究 一个在百慕大时间序列地点（ 弗雷德·塞尔斯博士）和另一个在秘鲁大陆边缘 (with Richard Jahnke博士）。 通过执行DOC调查 在更广泛的孔隙水/海底通量研究范围内， 有机质分解，DOC在碳循环中的作用 将对海底的碳同位素预算进行量化。

An analytical system and sampling procedures have been developed for the determination of pore water DOC, using a modification of the high temperature, platinum catalyzed oxidation method of Sugimura and Suzuki (1988). This approach employs chromatographic CO2 separation, and allows quantification by flame ionization detection or alteratively, isolation of the DOC derived CO2 for isotopic analysis. These methods measure pore water profiles and benthic chamber DOC fluxes in continental margin sediments from the Western North Atlantic Ocean and are providing a set of &13C (DOC) determinations on pore water samples from the same cores. Two benthic carbon cycle studies will be carried out, one at the Bermuda time-series site (with Dr. Fred Sayles) and the other on the Peru continental margin (with Dr. Richard Jahnke). By carrying out the DOC investigation within the context of broader pore water/benthic flux studies of organic mater decomposition, the role of DOC in the carbon cycle and carbon isotope budgets at the sea floor will be quantified.