bcodmo_dataset_986675_v1 eng UTF8 dataset service Adam Shepherd BCO-DMO 508-289-2772 266 Woods Hole Rd. MS#36 Woods Hole MA 02543 USA erddap@bco-dmo.org pointOfContact 2026-09-16 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) 2 column row [AT50-24 IC Data] - Geochemical data from sediment pushcore porewaters and water column Niskin samples collected from Gulf of Alaska, Alaska, USA, in June 2024 on R/V Atlantis cruise AT50-24 (Collaborative Research: Redefining the footprint of deep ocean methane seepage for benthic ecosystems) 2026-09-16 creation erddap.bco-dmo.org bcodmo_dataset_986675_v1 BCO-DMO info@bco-dmo.org https://osprey.bco-dmo.org/dataset/986675 information web browser Background Information Background information from the source information originator This dataset provides geochemical data (major ions) for porewaters from sediment pushcores collected by DSV Alvin from the R/V Atlantis in June 2024 (AT50-24) at methane seeps in the Aleutian Trench, Alaska, USA. Also included is geochemical data (major ions) for water samples collected by Niskin bottle, both via DSV Alvin and via CTD cast from the ship. Cores were sectioned into 1-3 centimeter (cm) horizons, and porewater was extracted shipboard using an argon-pressurized squeezer. Porewater samples were frozen at sea and thawed just before analysis. We report concentrations of fluoride, acetate, formate, chloride, bromide, nitrate, sulfate, thiosulfate, and phosphate anions and lithium, sodium, potassium, magnesium, and calcium cations. Measurements were made using the Thermo Dual Dionex Integrion HPIC ion chromatography system with either a 250 millimeter (mm) Dionex IonPac AS19-4 micrometer (um) column (anions) or a 250 mm Dionex IonPac CS16-4um column (cations), in the Resnick Water and Environment Laboratory at the California Institute of Technology (Caltech). BCO-DMO info@bco-dmo.org https://osprey.bco-dmo.org/dataset/986675 information web browser Background Information Background information from the source information pointOfContact earth science atmosphere ocean biosphere biology environment theme BCO-DMO project latitude longitude theme CF The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, ERD, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information. BCO-DMO largerWorkCitation project eng geoscientificInformation 1 -162.5897 -148.0007 53.74811 57.46695 [AT50-24 IC Data] - Geochemical data from sediment pushcore porewaters and water column Niskin samples collected from Gulf of Alaska, Alaska, USA, in June 2024 on R/V Atlantis cruise AT50-24 (Collaborative Research: Redefining the footprint of deep ocean methane seepage for benthic ecosystems) 2026-09-16 creation BCO-DMO info@bco-dmo.org https://osprey.bco-dmo.org/dataset/986675 information web browser Background Information Background information from the source information originator This dataset provides geochemical data (major ions) for porewaters from sediment pushcores collected by DSV Alvin from the R/V Atlantis in June 2024 (AT50-24) at methane seeps in the Aleutian Trench, Alaska, USA. Also included is geochemical data (major ions) for water samples collected by Niskin bottle, both via DSV Alvin and via CTD cast from the ship. Cores were sectioned into 1-3 centimeter (cm) horizons, and porewater was extracted shipboard using an argon-pressurized squeezer. Porewater samples were frozen at sea and thawed just before analysis. We report concentrations of fluoride, acetate, formate, chloride, bromide, nitrate, sulfate, thiosulfate, and phosphate anions and lithium, sodium, potassium, magnesium, and calcium cations. Measurements were made using the Thermo Dual Dionex Integrion HPIC ion chromatography system with either a 250 millimeter (mm) Dionex IonPac AS19-4 micrometer (um) column (anions) or a 250 mm Dionex IonPac CS16-4um column (cations), in the Resnick Water and Environment Laboratory at the California Institute of Technology (Caltech). ERDDAP tabledap 1 -162.5897 -148.0007 53.74811 57.46695 tight ERDDAPtabledapDatasetQueryAndAccess https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_986675_v1 ERDDAP:tabledap ERDDAP-tabledap ERDDAP's tabledap service (a flavor of OPeNDAP) for tabular (sequence) data. Add different extensions (e.g., .html, .graph, .das, .dds) to the base URL for different purposes. download [AT50-24 IC Data] - Geochemical data from sediment pushcore porewaters and water column Niskin samples collected from Gulf of Alaska, Alaska, USA, in June 2024 on R/V Atlantis cruise AT50-24 (Collaborative Research: Redefining the footprint of deep ocean methane seepage for benthic ecosystems) 2026-09-16 creation BCO-DMO info@bco-dmo.org https://osprey.bco-dmo.org/dataset/986675 information web browser Background Information Background information from the source information originator This dataset provides geochemical data (major ions) for porewaters from sediment pushcores collected by DSV Alvin from the R/V Atlantis in June 2024 (AT50-24) at methane seeps in the Aleutian Trench, Alaska, USA. Also included is geochemical data (major ions) for water samples collected by Niskin bottle, both via DSV Alvin and via CTD cast from the ship. Cores were sectioned into 1-3 centimeter (cm) horizons, and porewater was extracted shipboard using an argon-pressurized squeezer. Porewater samples were frozen at sea and thawed just before analysis. We report concentrations of fluoride, acetate, formate, chloride, bromide, nitrate, sulfate, thiosulfate, and phosphate anions and lithium, sodium, potassium, magnesium, and calcium cations. Measurements were made using the Thermo Dual Dionex Integrion HPIC ion chromatography system with either a 250 millimeter (mm) Dionex IonPac AS19-4 micrometer (um) column (anions) or a 250 mm Dionex IonPac CS16-4um column (cations), in the Resnick Water and Environment Laboratory at the California Institute of Technology (Caltech). OPeNDAP 1 -162.5897 -148.0007 53.74811 57.46695 tight OPeNDAPDatasetQueryAndAccess https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_986675_v1 OPeNDAP:OPeNDAP OPeNDAP An OPeNDAP service for tabular (sequence) data. Add different extensions (e.g., .html, .das, .dds) to the base URL for different purposes. download physicalMeasurement serial String Serial Fluoride float Fluoride Acetate float Acetate Formate float Formate Chloride float Chloride Bromide float Bromide Nitrate float Nitrate Sulfate float Sulfate Thiosulfate float Thiosulfate Phosphate float Phosphate Lithium float Lithium Sodium float Sodium Ammonium float Ammonium Potassium float Potassium Magnesium float Magnesium Calcium float Calcium perchlorate float Perchlorate pH float Ph Dive String Dive Horizon String Horizon Date_UTC String Date_utc Depth_m float Depth_m Station String Station Site String Site Sample_Name String Sample_name Adam Shepherd BCO-DMO 508-289-2772 266 Woods Hole Rd. MS#36 Woods Hole MA 02543 USA erddap@bco-dmo.org distributor OPeNDAP DAP/2.0 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_986675_v1.html order Data Subset Form ERDDAP's version of the OPeNDAP .html web page for this dataset. Specify a subset of the dataset and download the data via OPeNDAP or in many different file types. download https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_986675_v1.graph order Make-A-Graph Form ERDDAP's Make-A-Graph .html web page for this dataset. Create an image with a map or graph of a subset of the data. mapDigital This record was created from dataset metadata by ERDDAP Version 2.22