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https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_927046_v1 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_927046_v1.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_927046_v1/ public [Dissolved Organic Matter Sulfur and Carbon Analysis] - Dissolved organic matter sulfur and carbon analysis of samples collected between 2010 and 2021 from various locations globally (Resolving sources of marine DOM via novel sulfur isotope analyses) The following dataset of SPE (solid phase extracted) DOM (dissolved organic matter) accompanies Phillips et al. 2022 (doi: 10.1073/pnas.2209152119). Our project sought to address the question of where long-lived organic molecules that are dissolved in the oceans come from, in particular molecules containing sulfur (S). Our approach was to measure the relative abundance of two stable sulfur isotopes (S-32 and S-34) in these molecules, which is technically very difficult due to the presence of million-fold higher sulfate ions in seawater. We developed a new preparatory chemistry to adequately isolate these organic molecules, and a new elemental analyzer/mass spectrometry method to measure their isotope abundances with high precision at trace levels. We conducted these S isotope measurements on 100 samples of dissolved organic matter (DOM) that had been previously collected by our collaborators from around the world (Northeast Pacific oxygen minimum zone, Northeast Pacific Shelf, North Pacific Gyre, San Pedro Basin, Caeté Estuary, South Pacific Gyre, and the North Sea). We also collected 2 dozen new samples from oceanographic stations in the North Pacific Gyre (Hawaii Ocean Timeseries) and North Atlantic Gyre (Bermuda Atlantic Time Series). The dataset includes 1) sample information such as sample ID, sample location, station name, collection depth (ranging from 0 to 4800 meters), latitude and longitude, month and year sampled (ranging from 2010 to 2021); 2) elemental analysis such as sulfur isotope values (δ34S), carbon (C) isotope values (δ13C), and C:S molar ratios; 3) physical parameters from collaborators' CTD analysis, such as oxygen, salinity, fluorescence, and temperature; and 4) chemical data from collaborators such as dissolved nitrate, phosphate, silicate, and calculated DOC (dissolved organic carbon) and DOS (dissolved organic sulfur) concentrations. Our data show that DOM molecules have (34S/32S) isotope ratios that are entirely consistent with being formed from ocean sulfate, and inconsistent with being formed by reactions of hydrogen sulfide in anoxic porewaters. This result negates one of the leading hypotheses for how long-lived DOM forms, i.e. by reactions in anoxic sediments. Instead, this sharpens our focus on understanding how relatively short-lived biomolecules in the surface ocean are transformed into long-lived DOM molecules.\n\ncdm_data_type = Other\nVARIABLES:\nSample_ID (unitless)\nSample_Location (unitless)\nStation (unitless)\n... (23 more variables)\n https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_927046_v1/index.htmlTable https://www.bco-dmo.org/dataset/927046 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_927046_v1.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_927046_v1&showErrors=false&email= BCO-DMO bcodmo_dataset_927046_v1
https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_986596_v1 https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_986596_v1.graph https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_986596_v1/ public [DOS, DOP, DOBr, and DOI depth profiles from BATS and HOT] - Dissolved organic compound (DOS, DOP, DOBr, DOI) depth profiles collected at the Bermuda Atlantic Time Series Station (BATS) in August 2019 and at the Hawaii Ocean Time Series Station Aloha in July 2021 (The fate of lysis products of picocyanobacteria contributes to marine humic-like chromophoric dissolved organic matter) This dataset contains the Dissolved organic sulfur (DOS), dissolved organic phosphorus (DOP), dissolved organic bromine (DOBr) and dissolved organic iodine (DOI) data obtained ICP-MS analysis of solid-phase extracted samples collected at the BATS station (August 2019) and HOT station ALOHA (July 2021). These data are complementary to the fluorescence data set that was sampled at 200 m depth intervals in both the Central North Atlantic (BATS) and Central North Pacific (ALOHA). While the focus of study is to better understand a marine source of fluorescent dissolved organic matter (DOM) (i.e., picocyanobacteria), these data were collected to evaluate whether these heteroatoms within DOM follow the same trends with depth as the fluorescent components determined by parallel factor analysis of 3D fluorescence spectra. Briefly, DOM was isolated by solid phase extraction from 10L seawater samples that were collected from the surface to the seafloor at each station, resulting in 10 mL methanolic extracts for each sample. Extracts were stored at -20 degrees C until analysis in our home laboratory. Portions of these extracts were dried completely and re-dissolved in ultrapure water prior to DOS, DOP, DOBr, or DOI analysis by inductively coupled plasma-mass spectrometry.\n\ncdm_data_type = Other\nVARIABLES:\nlocation (unitless)\nstart_date (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\ndepth (m)\nDOS (nanomolar (nM))\nDOP (nanomolar (nM))\nDOBr (nanomolar (nM))\nDOI (nanomolar (nM))\n https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_986596_v1_fgdc.xml https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_986596_v1_iso19115.xml https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_986596_v1/index.htmlTable https://osprey.bco-dmo.org/dataset/986596 (external link) https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_986596_v1.rss https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_986596_v1&showErrors=false&email= BCO-DMO bcodmo_dataset_986596_v1

 
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