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Martin, William R; McCorkle, Daniel C (1993): Carbon and nitrogen content of marine pore waters. PANGAEA, https://doi.org/10.1594/PANGAEA.734088, Supplement to: Martin, WR; McCorkle, DC (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

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Abstract:
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.
Funding:
Fourth Framework Programme (FP4), grant/award no. MAS3970126: Atlantic Data Base for Exchange Processes at the Deep Sea Floor
Coverage:
Median Latitude: 39.119603 * Median Longitude: -71.553159 * South-bound Latitude: 38.266667 * West-bound Longitude: -72.878333 * North-bound Latitude: 39.611667 * East-bound Longitude: -70.915000
Event(s):
M&M_A-c * Latitude: 38.818333 * Longitude: -72.116667 * Elevation: -2587.0 m * Campaign: ADEPDCruises * Method/Device: Centrifuge (CENT) * Comment: Shipboard Centrifugation
M&M_A-wcs * Latitude: 38.818333 * Longitude: -72.116667 * Elevation: -2587.0 m * Campaign: ADEPDCruises * Method/Device: Whole core squeezer (WCS) * Comment: Shipboard Whole Core Squeezer
M&M_B-c * Latitude: 39.175000 * Longitude: -70.915000 * Elevation: -2737.0 m * Campaign: ADEPDCruises * Method/Device: Centrifuge (CENT) * Comment: Shipboard Centrifugation
Size:
6 datasets

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