DISSOLVED ORGANIC-CARBON CONCENTRATIONS IN MARINE PORE WATERS DETERMINED BY HIGH-TEMPERATURE OXIDATION

被引：54

作者：

MARTIN, WR ^{[1
]}

MCCORKLE, DC ^{[1
]}

机构：

[1] WOODS HOLE OCEANOG INST,DEPT GEOL & GEOPHYS,WOODS HOLE,MA 02543

来源：

LIMNOLOGY AND OCEANOGRAPHY | 1993年 / 38卷 / 07期

关键词：

D O I：

10.4319/lo.1993.38.7.1464

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We have developed sampling methods and an analytical system to determine the concentration of dissolved organic C (DOC) in marine pore waters. Our analytical approach is a modification of recently developed high-temperature, Pt-catalyzed oxidation methods; it uses chromatographic trapping of the DOC-derived CO2, followed by reduction to CH4 and flame ionization detection. Sampling experiments with nearshore sediments indicate that pore-water separation by whole-core squeezing causes artificially elevated DOC concentrations, while pore-water recovery by sectioning and centrifugation does not appear to introduce DOC artifacts. Results from a set of northwestern Atlantic continental slope cores suggest that net DOC production accounts for >50% of the organic C that is recycled at the sediment-water interface.

引用

页码：1464 / 1479

页数：16

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