[Incubation experiment data from Southern Hydrate Ridge and Astoria Canyon] - Incubation timepoint measurements from sediment cores collected at the Southern Hydrate Ridge and Astoria Canyon on R/V Atlantis cruises AT50-14 and AT50-29B in 2023 and 2024 (Collaborative Research: Investigating the source and flux of dissolved organic carbon released from methane seeps to the deep-ocean)

These data include incubation timepoint measurements of concentration and stable carbon isotope values of dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), and particulate organic carbon (POC) from sediment cores collected at a methane seep and associated reference site (Southern Hydrate Ridge) and a submarine canyon (Astoria Canyon). Sediment porosity and dissolved sulfate and methane concentrations are also presented.

These data were collected from 2023-2024 and across two cruises: AT50-14 (R/V Atlantis, 2023) and AT50-29B (R/V Atlantis, 2024). These data are used to assess the mechanism contributing to the production of methane-derived DOC across several environments. If this process occurs at a methane seep mediated through anaerobic oxidation of methane, the process should occur in other sedimentary environments in which these electron acceptors are available.