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https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_948709_v1 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_948709_v1.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_948709_v1/ public [EPR 2019 Size Fractionated Organic Matter] - Size fractionated organic carbon and nitrogen concentration and stable isotopes from water column of the East Pacific Rise in April 2019 on the R/V Atlantis cruise AT42-09 (Collaborative Research: From hot to cold in the dark - shifts in seafloor massive sulfide microbial communities as physical and geochemical conditions change after venting ceases) On R/V Atlantic cruise AT42-09 in April 2019, size fractionated suspended particulate organic matter samples from the water column at the East Pacific Rise (9°50'N 104°18.14'W) were obtained by opening the bottom of the Niskin bottle to ensured that particles that had sunk below the spigot were included. Between 100 and 120 L of water was gravity filtered, in sequence, through nylon mesh (142 mm diameter) of decreasing pore size (500, 180, 53, 20 µm and 5 µm mesh). The resuspended particulate matter from each sample and size class was collected by vacuum filtration through a 1.2 µm nominal pore size, pre-combusted GF/C glass fiber filter. Samples were wafted with HCl overnight to remove carbonate and sent to the UC Davis Stable Isotope Facility for C and N analysis concentration and stable isotope analysis. \n\nThe purpose of these samples was were used to create particle size to carbon and nitrogen relationships for models, while gaining insights into the origins and fate of particulate organic matter in the ocean. Additionally, these organic matter fractions are directly linked to 16S rRNA amplicon data.  16S rRNA sequence amplicons exactly corresponding to this organic matter data are deposited in SRA (Short Read Archive) under BioProject PRJNA1191024. \n\nJacob Cram conceived of the idea. Benjamin Tully of Center for Dark Energy Biosphere Investigations, University of Southern California oversaw sample collection. Paulina Huanca Valenzuela and Clara Fuchsman prepped the samples in the laboratory and analyzed the data.\n\ncdm_data_type = Other\nVARIABLES:\nStation (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nDate (unitless)\ndepth (m)\nSize_Fraction (micron (um))\nd13C_VPDB (permil (0/00))\nd15N_Air (permil (0/00))\nd15N_BDL_flag (unitless)\n... (5 more variables)\n https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_948709_v1_fgdc.xml https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_948709_v1_iso19115.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_948709_v1/index.htmlTable https://www.bco-dmo.org/dataset/948709 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_948709_v1.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_948709_v1&showErrors=false&email= BCO-DMO bcodmo_dataset_948709_v1
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_948746_v1 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_948746_v1.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_948746_v1/ public [ETNP 2012 McClane Pump POM] - Suspended Organic Particle concentration and stable C and N isotopes (collected with McClane Pumps and GF/F filters) from the Eastern Tropical North Pacific on the R/V Thompson cruise TN278 in April 2012 (The role of cryptic nutrient cycling within sinking particles on trace element transport in oxygen minimum zones) Suspended organic carbon and nitrogen concentrations and stable isotopes were obtained on the R/V Thompson cruise TN278 at St P2 (16.5 N 107.1 W; known as BB2 on this cruise) and at St P1 (20.1 N 106.0 W; known as BB1 on this cruise) in the Eastern Tropical North Pacific Oxygen Deficient Zone in April 2012. The Oxygen Deficient Zone extended from 105 m to 820 m at St P2 and from 95 to 800 m at St P1. Water was filtered onto 142 mm pre-combusted GF/F filters in situ using McClane pumps (on average ~300-500 L) in a depth profile. Two 21 mm diameter punches were obtained from each 142 mm filter and used for organic matter analysis. Sample punches were wafted with HCl overnight to remove carbonate and sent to the UC Davis Stable Isotope Facility (Davis, CA) for C and N analysis. \n\nThe purpose of this sampling was to quantify suspended organic matter in an offshore Oxygen Deficient Zone. \n\nJacquelyn Neibauer and Rick Keil of the University of Washington deployed the McClane pumps on the cruise. Jacquelyn Neibauer was in charge of prepping the samples. Megan Duffy and Clara Fuchsman of the University of Washington analyzed the data.\n\ncdm_data_type = Other\nVARIABLES:\nSample (unitless)\nSt (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nDate (unitless)\ndepth (m)\nNitrogen (micromolar (uM))\nCarbon (micromolar (uM))\nd15N_Air (permil (0/00))\nd13C_VPDB (permil (0/00))\nC_to_N (unitless)\n https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_948746_v1_fgdc.xml https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_948746_v1_iso19115.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_948746_v1/index.htmlTable https://www.bco-dmo.org/dataset/948746 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_948746_v1.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_948746_v1&showErrors=false&email= BCO-DMO bcodmo_dataset_948746_v1
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_948637_v1 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_948637_v1.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_948637_v1/ public [ETNP 2018-2019 suspended POM concentrations and isotopes] - Suspended Organic Particle concentration and stable C and N isotopes from the Eastern Tropical North Pacific in April 2018 (R/V Roger Revelle RR1805) and October 2019 (R/V Kilo Moana KM1920) (Dimensions: Diversity, assembly and function of microbial communities on suspended and sinking particles in a marine Oxygen Deficient Zone) Suspended Organic Particle Carbon and Nitrogen concentrations and stable C and N isotopes were obtained from the Eastern Tropical North Pacific on the R/V Revelle cruise RR1805 in April 2018 and the R/V Kilo Moana cruise KM1920 in October 2019. R/V Revelle cruise RR1805 sampled two stations in 2018: St P2 (16.9ºN 107ºW) and St P1 (20.3 °N 106.1°W). These two stations included an anoxic Oxygen Deficient Zone from 105-820 m for St P2 and 68-800 m for St P1. The R/V Kilo Moana cruise KM1920 sampled two stations in 2019: St P2 (16.9°N 107°W) and St P3 (21.8°N  109.9°W). These two stations included an anoxic Oxygen Deficient Zone from 110-820 m for St P2 and 160-650 m for St P3. St P3 is at the Northern Edge of the Oxygen Deficient Zone. St P2 is offshore in the core of the Oxygen Deficient Zone, and St P1 is on the continental slope.  \n\nDuring both cruises, water for bulk suspended particulate organic C and N analyses was obtained from Niskin bottles on a CTD rosette and vacuum-filtered it onto pre-combusted GF/F filters. Samples were wafted with HCl to remove carbonate and sent to the UC Davis Stable Isotope Facility (Davis, CA) for C and N analysis utilizing an elemental analyzer attached to an isotope ratio mass spectrometer. \n\nThe samples were obtained to determine whether organic matter concentrations increased and isotopic composition changed at the secondary chlorophyll maximum in the Oxygen Deficient Zone and at the zooplankton/forage fish vertical migration depth in the Oxygen Deficient Zone.  St P2 and St P1  had a secondary chlorophyll maximum and St P3 did not. \n\nSamples were collected and data were analyzed by Clara Fuchsman of Horn Point Laboratory, a part of the University of Maryland Center for Environmental Science.\n\ncdm_data_type = Other\nVARIABLES:\nCruise (unitless)\nstation (unitless)\nCast (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\n... (7 more variables)\n https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_948637_v1_fgdc.xml https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_948637_v1_iso19115.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_948637_v1/index.htmlTable https://www.bco-dmo.org/dataset/948637 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_948637_v1.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_948637_v1&showErrors=false&email= BCO-DMO bcodmo_dataset_948637_v1
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_948682_v1 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_948682_v1.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_948682_v1/ public [ETNP 2019 size fractionated POM concentrations and isotopes] - Size fractionated organic C and N concentrations and stable isotopes from the Eastern Tropical North Pacific on the R/V Kilo Moana cruise KM1920 in October 2019 (Dimensions: Diversity, assembly and function of microbial communities on suspended and sinking particles in a marine Oxygen Deficient Zone) Size fractionated Organic Particle Carbon and Nitrogen concentrations and stable C and N isotopes from the Eastern Tropical North Pacific  were obtained from the R/V Kilo Moana on cruise KM1920 in the Eastern Tropical North Pacific at two stations in October 2019: St P2 (16.9°N 107°W) and St P3 (21.8°N 109.9°W). These two stations included an anoxic Oxygen Deficient Zone from 110-820 m for St P2 and 160-650 m for St P3. \n\nFor size fractionated particulate organic C and N analyses, water was obtained from Niskin bottles on a CTD rosette, by opening the bottom of the Niskin bottle.  Water was gravity filtered through stacked mesh with the following pore sizes: 500 um, 180 um, 53 um, 20 um, and 5 um. Each fraction was resuspended off the mesh and vacuum filtered it onto pre-combusted GF/C filters (nominal pore size 1.2 um). Samples were wafted with HCl to remove carbonate and sent to the UC Davis Stable Isotope Facility (Davis, CA) for C and N analysis utilizing an elemental analyzer attached to an isotope ratio mass spectrometer. \n\nThe samples were obtained to determine particle size to carbon and nitrogen relationships for models, while gaining insights into the origins of particulate organic matter in the Oxygen Deficient Zone. \n\nSamples were collected by Jacob Cram of Horn Point Laboratory (University of Maryland Center for Environmental Science) and his lab members.  \n\nFilters were prepped in the lab, and data were analyzed by Clara Fuchsman of Horn Point Laboratory, a part of the University of Maryland Center for Environmental Science.\n\ncdm_data_type = Other\nVARIABLES:\nStation (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nDate (unitless)\ndepth (m)\n... (7 more variables)\n https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_948682_v1_fgdc.xml https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_948682_v1_iso19115.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_948682_v1/index.htmlTable https://www.bco-dmo.org/dataset/948682 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_948682_v1.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_948682_v1&showErrors=false&email= BCO-DMO bcodmo_dataset_948682_v1

 
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