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https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_894761_v1 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_894761_v1.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_894761_v1/ public [Benthic Iron on the Oregon Shelf] - Benthic iron data on the Oregon Shelf from samples collected on R/V Oceanus cruise OC2107A during July to August 2021 (Collaborative Research: Coupling of physical and chemical processes in the shelf to basin transport of iron and iodine off Washington and Oregon) These data were obtained on two cruises to the Oregon shelf in August and November 2021. They describe the release of dissolved iron (Fe) from the benthic boundary layer and show that a sizeable fraction of this Fe is present as soluble Fe(II). Hypoxia is increasing in strength and duration on the Oregon continental shelf. Intermediate waters of the North Pacific are also experiencing deoxygenation. Lower oxygen (O2) will lead to elevated Fe(II) release and persistence in the water column, increasing the role of the Oregon continental margin as an Fe source. Coastal Oregon and North Pacific Ocean waters are often iron-limited and this increased Fe source could act as a positive feedback to Pacific deoxygenation by increasing primary production and therefore carbon supply to hypoxic intermediate waters. Understanding and simulating continental margin Fe supply will provide helpful information for predicting the condition of the future coastal ocean. Intensive modeling and monitoring already occur for these waters due to their economic significance and an improved understanding of Fe, a critical nutrient in this region, will advance these efforts. Note this version of the dataset includes data only from the August 2021 cruise.\n\ncdm_data_type = Other\nVARIABLES:\nCruise (unitless)\nDate (unitless)\nFe_only (unitless)\nStation (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nCast (unitless)\nCast_type (unitless)\ndepth (m)\nSample_number (unitless)\nFe_II (nanomolar (nM))\nFe_II_std (nanomolar (nM))\nFe_II_flag (unitless)\nFe_II_err_flag (unitless)\ndFe (nanomolar (nM))\n... (9 more variables)\n https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_894761_v1_fgdc.xml https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_894761_v1_iso19115.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_894761_v1/index.htmlTable https://osprey.bco-dmo.org/dataset/894761 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_894761_v1.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_894761_v1&showErrors=false&email= BCO-DMO bcodmo_dataset_894761_v1
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_786511.subset https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_786511 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_786511.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_786511/ public [Electrochemical Data CL2015] - Electrochemical data from sediments collected on R/V Savannah cruise SAV-15-18 at the Cape Lookout Continental Shelf and Slope during July 2015 (Source, Composition, and Stability of Soluble Iron Fluxing from Continental Margin Sediments) Electrochemistry data from sediments collected on R/V Savannah cruise SAV-15-18 at the Cape Lookout Continental Shelf and Slope during July 2015.\n\ncdm_data_type = Other\nVARIABLES:\nYear (unitless)\nMonth (unitless)\nDay (unitless)\nCollection_Type (unitless)\nStation (unitless)\nlongitude (degrees_east)\nlatitude (degrees_north)\nSediment_depth (millimeters (mm))\nO2 (micromolar (uM))\nsdO2 (Sd O2, micromolar (uM))\nMn_II (micromolar (uM))\nsdMn_II (Sd Mn II, micromolar (uM))\nFe_II (micromolar (uM))\nsdFe_II (Sd Fe II, micromolar (uM))\nOrg_Fe_III (nA)\nsdOrgFe_III (Sd Org Fe III, nA)\nFeS_aq (Fe S Aq, nA)\nsdFeS_aq (Sd Fe S Aq, nA)\nSH2S (SH2 S, micromolar (uM))\nsdSH2S (SD SH2 S, micromolar (uM))\ntime (seconds since 1970-01-01T00:00:00Z)\n https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_786511_fgdc.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_786511/index.htmlTable https://www.bco-dmo.org/dataset/786511 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_786511.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_786511&showErrors=false&email= BCO-DMO bcodmo_dataset_786511
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_805916.subset https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_805916 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_805916.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_805916/ public [Electrochemical Data CL2016] - Electrochemical data from sediments collected on R/V Savannah cruise SAV-16-16 at the Cape Lookout Continental Shelf and Slope during May 2016 (Source, Composition, and Stability of Soluble Iron Fluxing from Continental Margin Sediments) Electrochemical data from sediments collected on R/V Savannah cruise SAV-16-16 at the Cape Lookout Continental Shelf and Slope during May 2016.\n\ncdm_data_type = Other\nVARIABLES:\nYear (unitless)\nMonth (unitless)\nDay (unitless)\nCollection_Type (unitless)\nStation (unitless)\nlongitude (degrees_east)\nlatitude (degrees_north)\nSediment_depth (millimeters (mm))\nO2 (uM (micromolar))\nsdO2 (Sd O2, uM (micromolar))\nMn_II (uM (micromolar))\nsdMn_II (Sd Mn II, uM (micromolar))\nFe_II (uM (micromolar))\nsdFe_II (Sd Fe II, uM (micromolar))\nOrg_Fe_III (nA)\nsdOrgFe_III (Sd Org Fe III, nA)\nFeS_aq (Fe S Aq, nA)\nsdFeS_aq (Sd Fe S Aq, nA)\nSH2S (SH2 S, uM (micromolar))\nsdSH2S (SD SH2 S, uM (micromolar))\ndate (unitless)\n https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_805916_fgdc.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_805916/index.htmlTable https://www.bco-dmo.org/dataset/805916 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_805916.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_805916&showErrors=false&email= BCO-DMO bcodmo_dataset_805916
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_806429.subset https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_806429 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_806429.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_806429/ public [Electrochemical Data GoM2017] - Electrochemical data from sediments collected on R/V Savannah cruise SAV-17-15 in the Gulf of Mexico during July and August 2017 (Source, Composition, and Stability of Soluble Iron Fluxing from Continental Margin Sediments) Electrochemical data from sediments collected on R/V Savannah cruise SAV-17-15 in the Gulf of Mexico during July and August 2017.\n\ncdm_data_type = Other\nVARIABLES:\nYear (unitless)\nMonth (unitless)\nDay (unitless)\nCollection_Type (unitless)\nStation (unitless)\nlongitude (degrees_east)\nlatitude (degrees_north)\nSediment_depth (millimeters (mm))\nO2 (uM (micromolar))\nsdO2 (Sd O2, uM (micromolar))\nMn_II (uM (micromolar))\nsdMn_II (Sd Mn II, uM (micromolar))\nFe_II (uM (micromolar))\nsdFe_II (Sd Fe II, uM (micromolar))\nOrg_Fe_III (nA)\nsdOrgFe_III (Sd Org Fe III, nA)\nSH2S (SH2 S, micromolar (uM))\nsdSH2S (SD SH2 S, micromolar (uM))\nFeS_aq (Fe S Aq, nA)\nsdFeS_aq (Sd Fe S Aq, nA)\nS2O3 (S2 O3, micromolar (uM))\nsdS2O3 (Sd S2 O3, micromolar (uM))\ndate (unitless)\n https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_806429_fgdc.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_806429/index.htmlTable https://www.bco-dmo.org/dataset/806429 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_806429.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_806429&showErrors=false&email= BCO-DMO bcodmo_dataset_806429
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_904782_v1 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_904782_v1.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_904782_v1/ public [Northern Gulf of Mexico electrochemical data Fall 2020] - Electrochemical data from sediment cores collected on the Louisiana Shelf of the Northern Gulf of Mexico during November 2020 on R/V Savannah cruise SAV-20-07 (Importance of Riverine Discharge on the Benthic Flux of Alkalinity to Continental Margins) This data set reports sediment depth profiles of dissolved O2, Mn2+, Fe2+, and total dissolved sulfide (SH2S) concentrations, as well as pH and current intensities of organic-Fe(III) complexes and aqueous clusters of FeS (FeS(aq)) that cannot be quantified directly. These data were obtained by profiling intact sediment cores using voltammetric and pH microelectrodes deployed on a computer-operated micromanipulator. Sediment cores were collected at five different stations on the Louisiana Shelf on the Northern Gulf of Mexico during the week of November 3-6, 2020 using an MC-800 multi-corer. These stations extend from the middle of the shelf offshore from Cocodrie, LA to the mouth of the Mississippi River North West Pass. All depth profiles were started within 30 minutes after collection. The field sampling was conducted during R/V Savannah cruise SAV-20-07.\n\ncdm_data_type = Other\nVARIABLES:\nYear (unitless)\nMonth (unitless)\nDay (unitless)\nDate (unitless)\nCollection_Type (unitless)\nStation (unitless)\nlongitude (degrees_east)\nLat (degrees_north)\nSediment_depth (centimeters (cm))\npH (unitless (pH scale))\nO2 (micrometers (uM))\nsd_O2 (micrometers (uM))\nMn_II (micrometers (uM))\nsd_Mn_II (micrometers (uM))\nFe_II (micrometers (uM))\nsd_Fe_II (micrometers (uM))\nSH2S (micrometers (uM))\nsd_SH2S (micrometers (uM))\nS2O3 (micrometers (uM))\n... (5 more variables)\n https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_904782_v1/index.htmlTable https://www.bco-dmo.org/dataset/904782 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_904782_v1.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_904782_v1&showErrors=false&email= BCO-DMO bcodmo_dataset_904782_v1
log in [Northern Gulf of Mexico pore geochemical data] - Depth profiles of pore water constituents from sediment cores collected on the Louisiana Shelf of the Northern Gulf of Mexico during 2020, 2021, and 2022 on R/V Savannah cruises SAV-20-07, SAV-21-25, SAV-21-24, SAV-22-06, and SAV-22-11 (Importance of Riverine Discharge on the Benthic Flux of Alkalinity to Continental Margins) This data set reports depth profiles of pore water concentrations of dissolved inorganic carbon (DIC), orthophosphate (PO43-), ammonium (NH4+), total alkalinity (TA), carbon isotopic fractionation of DIC (13C-DIC), dissolved manganese (Mnd), dissolved calcium (Cad), reduced iron (Fe(II)), total dissolved Fe (Fed), and dissolved Fe(III) (Fe(III)d) by the difference of total dissolved Fe and Fe(II). Data were collected during five R/V Savannah cruises in fall 2020, summer and fall 2021, and fall and spring 2022. On each cruise pore water data were obtained from sediment cores collected with an MC-800 multi-corer at multiple stations. Cruise IDs were: SAV-20-07, SAV-21-25, SAV-21-24, SAV-22-06, SAV-22-11.\n\nAll cores were processed within a few hours after collection. The pore waters were first extracted by slicing sediment cores of < 40 centimeters (cm) long and centrifugation of the pore waters under N2 atmosphere to avoid air contamination. Pore waters were then immediately filtered through 0.22-micrometer (um) PSE syringe filters under N2 atmosphere and either analyzed immediately onboard (Fe speciation, orthophosphate, DIC), preserved acidified with hydrochloric acid at 4 degrees Celsius (Cad, Mnd), frozen (ammonium), or preserved at 4 degrees Celsius after addition of HgCl2 (TA) until analysis.  In addition, samples for TA and carbon isotopic analyses were preserved in glass bottles, whereas other samples were preserved in polypropylene containers.\n\nDIC was analyzed by flow injection analysis (Hall and Aller, 1992), orthophosphate, ammonium, and Fe speciation by spectrophotometry (Murphy and Riley, 1962; Strickland and Parsons, 1972; Stookey, 1970), TA by Gran titration (Gran, 1952), the carbon isotopic signature by isotope ratio mass spectrometry (Wang et al, 2018), and Mnd and Cad by ICP-MS (Magette et al., 2025 In preparation).\n\ncdm_data_type = Other\nVARIABLES:\nYear (unitless)\nMonth (unitless)\nDay (unitless)\nDate (unitless)\nCollection_Type (unitless)\nStation (unitless)\n... (24 more variables)\n BCO-DMO bcodmo_dataset_904417_v2
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_806105.subset https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_806105 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_806105.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_806105/ public [Pore Water Depth Profiles GoM2017] - Sediment pore water and solid phase geochemical analyses from samples collected on R/V Savannah cruise SAV-17-15 in the Gulf of Mexico during July and August 2017 (Source, Composition, and Stability of Soluble Iron Fluxing from Continental Margin Sediments) Sediment pore water and solid phase geochemical analyses from samples collected on R/V Savannah cruise SAV-17-15 in the Gulf of Mexico during July and August 2017.\n\ncdm_data_type = Other\nVARIABLES:\nYear (unitless)\nMonth (unitless)\nDay (unitless)\nCollection_Type (unitless)\nStation (unitless)\nlongitude (degrees_east)\nlatitude (degrees_north)\nsample_ID (unitless)\nSediment_depth (centimeters (cm))\nFe_II (micromolar (uM))\nsdFe_II (Sd Fe II, micromolar (uM))\nFed (micromolar (uM))\nsdFed (Sd Fed, micromolar (uM))\nFe_III_d (micromolar (uM))\nsdFe_III_d (Sd Fe III D, micromolar (uM))\nDIC (millimolar (mM))\nsdDIC (Sd DIC, millimolar (mM))\nPO4 (Mass Concentration Of Phosphate In Sea Water, micromolar (uM))\nsdPO4 (Sd PO4, micromolar (uM))\nMnd (micromolar (uM))\nsdMnd (SD MND, micromolar (uM))\nNH4 (Mole Concentration Of Ammonium In Sea Water, micromolar (uM))\nsdNH4 (SD NH4, micromolar (uM))\nNO2 (Mole Concentration Of Nitrite In Sea Water, micromolar (uM))\nsdNO2 (Sd NO2, micromolar (uM))\nBr (micromolar (uM))\n... (10 more variables)\n https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_806105_fgdc.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_806105/index.htmlTable https://www.bco-dmo.org/dataset/806105 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_806105.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_806105&showErrors=false&email= BCO-DMO bcodmo_dataset_806105

 
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