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https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1002509_v1 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1002509_v1.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_1002509_v1/ public [Geochemical data from methane seeps in the Cascadia Margin] - Porewater geochemical data from methane seeps in the Astoria Canyon and Hydrate Ridge along the Cascadia Margin collected during R/V Atlantis cruises 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 vertical profiles of concentrations and stable carbon isotope values of dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), and 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 and Hydrate Ridge along the Cascadia Margin were sampled. These data were collected over two years and across two cruises: AT50-14 (R/V Atlantis, 2023) and AT50-29B (R/V Atlantis, 2024). These data are used to assess the prevalence of methane-derived DOC at methane seeps, which may contribute 'old' carbon to the deep ocean or serve as a source of reduced carbon for the deep ocean microbial loop.\n\ncdm_data_type = Other\nVARIABLES:\nCruise (unitless)\nRegion (unitless)\nStation (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nCore_Type (unitless)\nCore_retrieval_method (unitless)\nDate_Collected (unitless)\nDive (unitless)\nWater_depth_m (meters (m))\nTop_sed_depth_cm (centimeters below sea floor (cmbsf))\nBottom_sed_depth_cm (centimeters below sea floor (cmbsf))\nDepth_cm (centimeters below sea floor (cmbsf))\nSample_ID (unitless)\nCore_ID (unitless)\nCore_Allocation (unitless)\nFlux_Regime_Location_Based (unitless)\nOLW_num (unitless)\nComments (unitless)\nFrozen_status (unitless)\n... (35 more variables)\n https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_1002509_v1_fgdc.xml https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_1002509_v1_iso19115.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_1002509_v1/index.htmlTable https://osprey.bco-dmo.org/dataset/1002509 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_1002509_v1.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_1002509_v1&showErrors=false&email= BCO-DMO bcodmo_dataset_1002509_v1
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1002493_v1 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1002493_v1.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_1002493_v1/ public [Incubation experiment data from Chesapeake Bay] - Incubation timepoint measurements from sediment cores collected in Chesapeake Bay in July 2022 (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 an estuary (Chesapeake Bay). Sediment porosity and dissolved sulfate and methane concentrations are also presented. These data were collected from July 2022 during cruise CB22 (R/V Carson). 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. This produced DOC, which may contribute to benthic food webs or contribute to the apparent radiocarbon age of dissolved organic carbon.\n\ncdm_data_type = Other\nVARIABLES:\nRegion (unitless)\nCruise (unitless)\nlatitude (Latitude_ddeg, degrees_north)\nlongitude (Longitude_ddeg, degrees_east)\nSampling_Date (unitless)\nIncubation (unitless)\nZone (unitless)\nTreatment (unitless)\nMethod (unitless)\nTemperature (degrees Celsius (°C))\nSample_name (unitless)\nDays_elapsed (days)\nBag_porewater_mL (milliliters (mL))\niCH4_permille (per mille (‰))\niCO2_permille (per mille (‰))\nCH4_mM (millimolar (mM))\nCO2_mM (millimolar (mM))\nSO4_mM (millimolar (mM))\n... (7 more variables)\n https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_1002493_v1_fgdc.xml https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_1002493_v1_iso19115.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_1002493_v1/index.htmlTable https://osprey.bco-dmo.org/dataset/1002493 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_1002493_v1.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_1002493_v1&showErrors=false&email= BCO-DMO bcodmo_dataset_1002493_v1
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1002498_v1 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1002498_v1.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_1002498_v1/ public [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. At methane seeps, this produced DOC which may contribute to benthic food webs or contribute to the apparent radiocarbon age of deep  ocean dissolved organic carbon.\n\ncdm_data_type = Other\nVARIABLES:\nRegion (units)\nCruise (unitless)\nlatitude (Latitude_ddeg, degrees_north)\nlongitude (Longitude_ddeg, degrees_east)\nSampling_Date (unitless)\nIncubation (unitless)\nClassification (unitless)\nZone (unitless)\nTreatment (unitless)\nTemperature (degrees Celsius (°C))\nSample_name (unitless)\nDays_elapsed (days)\nBag_porewater_mL (milliliters (mL))\niCH4_permille (per mille (‰))\niCO2_permille (per mille (‰))\nCH4_mM (millimolar (mM))\nCO2_mM (millimolar (mM))\n... (8 more variables)\n https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_1002498_v1_fgdc.xml https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_1002498_v1_iso19115.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_1002498_v1/index.htmlTable https://osprey.bco-dmo.org/dataset/1002498 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_1002498_v1.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_1002498_v1&showErrors=false&email= BCO-DMO bcodmo_dataset_1002498_v1

 
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