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Profiles of dissolved iron-binding ligands and their conditional stability constants from R/V Knorr KN199-04, KN204-01, subtropical North Atlantic Ocean, 2010-2011 (U.S. GEOTRACES NAT project) (NCEI Accession 0278050)


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            title:  Profiles of dissolved iron-binding ligands and their conditional stability constants from R/V Knorr KN199-04, KN204-01, subtropical North Atlantic Ocean, 2010-2011 (U.S. GEOTRACES NAT project) (NCEI Accession 0278050)
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                date:  2023-05-11
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                  Anchor:  http://lod.bco-dmo.org/id/person/51624 Kristen Buck
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        abstract:  This dataset contains chemical and physical data collected on R/V Knorr during cruises KN199-04 and KN204-01 at Subtropical northern Atlantic Ocean on 2016-12-08. These data include Iron, depth, and trace metal concentration. The instruments used to collect these data include BASi Controlled Growth Mercury Electrode, BASi EC-epsilon 2 Autoanalyzer, GO-FLO Teflon Trace Metal Bottle, and GeoFish Towed near-Surface Sampler. These data were collected by Kristen Buck of Bermuda Institute of Ocean Sciences as part of the "U.S. GEOTRACES North Atlantic Transect (U.S. GEOTRACES NAT)" project and "U.S. GEOTRACES (U.S. GEOTRACES)" program. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2022-05-16. The following is the text of the dataset description provided by BCO-DMO: Profiles of concentrations of dissolved iron-binding ligands and their respective conditional stability constants Dataset Description: Concentrations of dissolved iron-binding ligands and their respective conditional stability constants in water column samples from full depth stations occupied during the first leg (KN199-4) of the U.S. GEOTRACES North Atlantic zonal transect cruises on the R/V Knorr in 2010. The FISH and BOTTLE data have been split into separate columns as per GEOTRACES Parameter Naming Conventions. The FISH data are to the far right. Versions: version 6, 2016-12-08: separate columns for Fish and Bottle samples; quality flags added. version 5, 19 Nov. 2014: Added L3 data. version 4, 14 April 2014: Revised values for KN204-1 measurements. version 3, 26 June 2013: KN199-04 station 7 values corrected. version 2, 10 June 2013: KN199-04 data updated, KN204-01 data added. version 1, 31 Dec. 2012: Initial data submitted.
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          Anchor:  https://www.nsf.gov/awardsearch/showAward?AWD_ID=0927453 Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0927453 Award URL: http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0927453
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                title:  Buck, K. (2016) Profiles of dissolved iron-binding ligands and their conditional stability constants from R/V Knorr KN199-04, KN204-01, subtropical North Atlantic Ocean, 2010-2011 (U.S. GEOTRACES NAT project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 6) Version Date 2016-12-08. https://doi.org/10.26008/1912/bco-dmo.3844.6
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        supplementalInformation:  Acquisition Description: Sample collection and filtering: Water column samples were collected by the U.S. GEOTRACES sampling team from 24 modified 12 L Teflon-lined GoFlo samplers (General Oceanics) deployed on the GEOTRACES clean CTD rosette system. The U.S. GEOTRACES sampling team filtered the samples through 0.2 µm Supor Acropak filter cartridges (Pall) inside the U.S. GEOTRACES clean-air laboratory van. Near-surface samples (~2 m depth) were collected underway either on approach or leaving each station using the Ken Bruland lab towfish (“GeoFish”) deployed to collect surface samples from outside the wake of the ship. Seawater from the towfish was pumped directly into the Bruland lab clean air laboratory van and filtered through 0.2 µm Supor Acropak filter cartridges. Filtered seawater samples for Fe speciation (organic complexation) analyses were collected in 500 mL acid-cleaned Nalgene narrow-mouth fluorinated high-density polyethylene bottles that were conditioned with a Milli-Q fill for at least two weeks, and rinsed three times with filtered sample prior to sample collection. All filtered seawater samples for dissolved iron speciation from leg 1 were provided directly to the PI (Buck), who either analyzed the sample shipboard or froze the sample at -20 ºC for laboratory-based analyses post cruise. Dissolved iron speciation (organic complexation) analyses: Dissolved Fe speciation (organic complexation) was analyzed using a competitive ligand exchange- adsorptive cathodic stripping voltammetry (CLE-ACSV) method with salicylaldoxime as the added competing ligand (Buck et al. 2007, 2010, 2012), modified from the original Rue and Bruland (1995) method. Dissolved Fe additions of 0 to 7.5 nM were used in the titrations, for a total of at least 10 points in each titration. Deposition times of 90 to 120 s were applied to the analyses. All analyses were performed on Bioanalytical Systems (BAS i ) Controlled Growth Mercury Electrodes (static mercury drop setting, size 14) with Epsilon e2 (BAS i ) electrochemical analyzers. There are no reference samples available for iron speciation/ organic complexation measurements of iron in seawater, though this method was shown to compare well with other labs and techniques in the GEOTRACES intercalibration exercises (Buck et al. 2012, 2016).
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                description:  NCEI Accession 0278050 v1.1 was published.
                dateTime:
                  DateTime:  2023-05-11T05:23:07Z
                output:  (LE_Source)
                    sourceCitation:  (CI_Citation)
                        title:  NCEI Accession 0278050 v1.1
                        date:  (CI_Date)
                            date: (inapplicable)
                            dateType:  (CI_DateTypeCode) publication
                        citedResponsibleParty:  (CI_ResponsibleParty)
                            individualName: (inapplicable)
                            contactInfo:  (CI_Contact)
                                onlineResource:  (CI_OnlineResource)
                                    linkage: https://www.ncei.noaa.gov/archive/accession/0278050/1.1
                                    protocol:  HTTPS
                                    name:  NCEI Accession 0278050 v1.1
                                    description:  published 2023-05-11T05:23:07Z
                                    function:  (CI_OnLineFunctionCode) download
                            role: (inapplicable)
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    metadataMaintenance:  (MD_MaintenanceInformation)
        maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) asNeeded
        maintenanceNote:  Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.
        contact:  (CI_ResponsibleParty)
            organisationName:  NOAA National Centers for Environmental Information
            role:  (CI_RoleCode) custodian
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    acquisitionInformation:  (MI_AcquisitionInformation)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  bottle
            type:  bottle
            description:  any type of water bottle sampling device Generic name for water collection device; usually used to determine temperature, salinity and provide water aliquots for measurement of a wide range of parameters; often referred to by a specific type of water sampling bottle, such as a Nansen or Niskin bottle.
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  R/V Knorr
            description:  Title: R/V Flag: United States of America Vessel Type: Research Vessel (Oceanographic) DOB: 1970 IMO: 7738618 MMSI: 367246000
            instrument: (missing)