©2026 Biological and Chemical Oceanography Data Management Office.These data include vertical profiles of concentrations and stable carbon isotope values of dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), total organic carbon (TOC) from sediment cores collected at methane seeps and reference sites. Sediment porosity and dissolved sulfate and methane concentrations are also presented. Methane seeps in Astoria Canyon, Barkley Canyon, Hydrate Ridge, and Bullseye Vent, along the Cascadia Margin, were sampled. These data were collected over two de...
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The NSF (OCE-2049517) funded ship time, SO4, H2S, DIC, d13C-DIC measurements and partially funded CH4, DOC and d13C-DOC measurements
The DOE NETL interagency agreement with the USGS (#89243320SFE000013) partially funded CH4 measurements
The USGS Mendenhall Research Fellowship Program partially funded DOC and d13C-DOC measurements, and funded TOC and d13C-TOC measurements
Lalk, E., Pohlman, J., Lapham, L. L., Casso, M., Glenna, M., Hildebrand, A., Lloyd, K. G., Ma, K., Seewald, J. S., Stock, L., Strauss, M. A., Sylva, S., Traver, L., Wilson, R., Williams, L. (2025). Porewater dissolved organic carbon and associated geochemical data for methane seeps in the Cascadia Margin: Astoria Canyon, Barkley Canyon, Hydrate Ridge, and Bullseye Vent. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-05-21 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.959765.1 [access date]
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This dataset is licensed under Creative Commons Attribution 4.0.
If you wish to use this dataset, it is highly recommended that you contact the original principal investigators (PI). Should the relevant PI be unavailable, please contact BCO-DMO (info@bco-dmo.org) for additional guidance. For general guidance please see the BCO-DMO Terms of Use document.