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PANGAEA
In:
Supplement to: Martin, William R; McCorkle, Daniel C (1993): Dissolved organic carbon concentrations in marine pore waters determined by high-temperature oxidation. Limnology and Oceanography, 38(7), 1464-1479, https://doi.org/10.4319/lo.1993.38.7.1464
Publication Date:
2023-05-12
Description:
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.
Keywords:
ADEPD; ADEPDCruises; Atlantic Data Base for Exchange Processes at the Deep Sea Floor; CENT; Centrifuge; M&M_A-c; M&M_A-wcs; M&M_B-c; M&M_B-wcs; M&M_D-c; M&M_D-wcs; M&M_F-c; WCS; Whole core squeezer
Type:
Dataset
Format:
application/zip, 6 datasets
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