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Shipboard FIA dissolved Al, Fe, and Mn from samples collected by GO-FLO bottles during USCGC Healy cruise HLY1502 (GN01) in the Canada and Makarov Basins of the Arctic Ocean from August to October 2015 (NCEI Accession 0278615)


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            title:  Shipboard FIA dissolved Al, Fe, and Mn from samples collected by GO-FLO bottles during USCGC Healy cruise HLY1502 (GN01) in the Canada and Makarov Basins of the Arctic Ocean from August to October 2015 (NCEI Accession 0278615)
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                  Anchor:  http://lod.bco-dmo.org/id/person/50550 Christopher I. Measures
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1572 The University of Hawai'i System (UH)
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        abstract:  This dataset contains chemical and physical data collected on USCGC Healy during cruise HLY1502 from 2015-08-12 to 2015-10-08. These data include Iron, Manganese, and depth. The instruments used to collect these data include Flow Injection Analyzer, Flow injection lumogallion system with fluorometer, and GO-FLO Bottle. These data were collected by Christopher I. Measures and Mariko Hatta of University of Hawaii as part of the "GEOTRACES Arctic Section: Shipboard determination of key trace elements (GEOTRACES Arctic Al Fe Mn)" project. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2022-05-13. The following is the text of the dataset description provided by BCO-DMO: Shipboard FIA dissolved Al, Fe, and Mn (0.2 um AcroPak filter) from bottle samples Dataset Description: Acquisition Description: Water samples (water column, surface water, water under sea-ice, sea-ice, snow, and melt pond) were collected at 28 stations from the USCG Healy during the GEOTRACES Western Arctic research expedition, which took place during the US GEOTRACES Arctic cruise aboard USCGC Healy (HLY1502) from August 9 to October 11, 2015 in the Arctic Ocean. This dataset contains data resulting from BOTTLE samples. Water column samples were obtained using the custom-built U.S. GEOTRACES trace-metal clean CTD rosette, consisting of a plastic-coated aluminum frame, titanium pressure housings for electronics and sensors, no sacrificial zinc anodes, and 24 12 L General Oceanic GO-FLO bottles modified for trace metal sampling (Cutter and Bruland, 2012). Before deployment and immediately upon recovery, the tops of the GO-FLO bottles were covered with polyethylene shower-caps, and the bottles were removed from the frame and carried into the U.S. GEOTRACES clean container laboratory for sub-sampling. The GO-FLO bottles were pressurized to 10 psi using HEPA-filtered compressed air, and samples were filtered through 0.2 um Pall Acropak Supor filter capsules that had been pre-cleaned by soaking overnight and flushed with 5 L of un-acidified seawater. The 0.2 μm-filtered seawater samples were acidified to pH 2 using trace metal-grade HCl. All sub-sampling was undertaken in the clean container using rigorous trace-metal clean protocols (Cutter and Bruland, 2012). Samples were drawn into pre-numbered 125 ml PMP bottles after three rinses and were stored in plastic bags in the dark at room temperature before determination which was usually within 12-36 hours of collection. Samples were analyzed shipboard for dissolved Al, Fe & Mn using flow injection analysis methods (Resing and Measures, 1994; Measures et al., 1995, Resing and Mottl, 1992 respectively). Prior to determination samples were acidified by the addition of 125 ul sub-boiling distilled 6N HCl and were microwaved in groups of 4 for 3 minutes in a 900 W microwave oven to achieve a temperature of 60 +/- 10 ˚C. Samples were allowed to cool for at least 1 hour prior to determination. Samples were determined in groups of 8. For preparation for standard solutions: Shipboard mixed standards (Al and Fe, Mn) were prepared in the shore-based laboratory by serial dilution of commercial Al, Fe, and Mn standards (BDH Aristar) into distilled water which was acidified with the equivalent of 4 ml sub-boiled 6N HCl. Standards for instrument calibration were prepared daily from filtered seawater by acidifying 1 L of low Fe seawater from a previous cast with 1 ml of 6N HCl and microwaving for 5 minutes to reach a temperature of 60 +/- 10˚C. After 1 hour, 200 +/- 2 ml of the cooled seawater was added to each of three 250 ml PMP bottles each of which had been rinsed three times with the microwaved seawater and shaken dry. Working standards were prepared by adding 0, +100uL, +200uL spikes of the shipboard mixed standard to these bottles, to yield a standard curve of +10.58nM and +21.16nM for Al, +0.528nM and +1.057nM for Fe, +1.45nM and +2.90nM for Mn. The system blank from the addition of the acid and buffer to samples was determined by double spiking a replicate sample i.e. by adding 2 x 125 ul 6N HCl and 5 ml of sample buffer to the replicate bottle and comparing the resulting signal to the original sample. For dissolved Al analysis: Dissolved Al was determined using a Flow Injection Analysis scheme with fluorometric detection. Major components were a Rabbit peristaltic pump, a Dynamax FL-1 flourometer, a Rainin A/D board and a Macintosh G3 computer running Rainin MacIntegrator v 1.4.3 to log and reduce data. The analytical scheme produces a complex between lumogallion and dissolved Al which when excited at 484 nm produces flourescence at 552 nm. Detailed description of the methodology is published in Resing and Measures (1994). A 3-minute pre-concentration of sample (~9 ml) onto an 8-hydroxyquinoline (8-HQ) resin column yielded a detection limit of 0.27 and a precision of 2.1% at 12.8 nM. For dissolved Fe analysis: Dissolved Fe was determined using a Flow Injection Analysis scheme with spectrophotometric detection (Rainin Dynamax UV-C). Major components were a Rabbit peristaltic pump, a Rainin Dynamax UV-C, a Rainin A/D board and a Macintosh G3 computer running Rainin MacIntegrator v 1.4.3 to log and reduce data. The spectrophotometric detection of the iron eluted from the column is achieved through its catalytic effect on the oxidation of N,N-dimethylp-phenylenediamine dihydrochloride (DPD) the oxidized product is measured at 514 nm. Detailed description of the methodology is published in Measures et al (1995). A 3-minute pre-concentration of sample (~9 ml) onto an 8-hydroxyquinoline (8-HQ) resin column yielded a detection limit of 0.090 nM and a precision of 0.67% at 2.96nM. For dissolved Mn analysis: Dissolved Mn was determined using a Flow Injection Analysis scheme with spectrophotometric detection (Rainin Dynamax UV-C). Major components were a Rabbit peristaltic pump, a Rainin Dynamax UV-C, a Rainin A/D board and a Macintosh G3 computer running Rainin MacIntegrator v 1.4.3 to log and reduce data. The spectrophotometric detection of the manganese eluted from the column is achieved through its catalytic effect on the formation of malachite green which is measured at 620 nm. Detailed description of the methodology is published in Resing and Mottl (1992). A 3-minute pre-concentration of sample (~9 ml) onto an 8-hydroxyquinoline (8-HQ) resin column yielded a detection limit of 0.55 nM and a precision of 1.16% at 2.7 nM. Calculation of each dissolved trace element concentrations: Calculation of sample concentrations was by dividing the peak height derived from sample using the A/D software by the calculated slope of the standard curve. Variations in the slope of the standard curve during a day's run were corrected by the following procedure. The change in the value of the slope of the standard curve between each run of standards was divided by the number of samples run between those standards to provide a calculated value for the slope of the standard curve at the point each sample was run. The value of the peak height for each sample was then recalculated by the estimated ratio of the standard curve slope at the point that sample was run. The estimate of the slope at each sample run is calculated by: (Initial slope + (incremental change per sample X # of samples run since initial standard was run)). The sample concentration is then calculated from the initial standard curve slope. The analytical blanks of dissolved Fe and Mn were determined by the shore-based ICPMS data that was measured by co-PI Dr. J. Fitzsimmons (Texas A&M University). The ICPMS data and its metadata will be submitted separately. The blank corrected FIA data was obtained from the intercept of the correlation plot between the ICPMS data and FIA data on each of the days the FIA was run. Intercalibration for dissolved Al: GEOTRACES standard seawater and internal standard seawater were analyzed periodically. A large batch of seawater was acidified prior to the cruise and used as a primary standard during measurements. This standard seawater was run along with each sample analysis. Our laboratory has participated the GEOTRACES intercalibration effort using this flow injection method. We report our laboratory values for the GEOTRACES GS standard analyses using this flow injection method to be: GEOTRACES GS = 29.63±1.15nM (n=2). Using 1L=1.027kg, our Al value is calculated as 28.85±1.12 nmol/kg and it is within the error of the consensus value (27.5±0.2 nmol/kg). These results are in good agreement with this from the GEOTRACES intercalibration effort for Al and demonstrate that the methodologies employed to produce this dataset detect concentrations within the standard deviation of current consensus values. The Al data from the GEOTRACES Arctic Ocean cruise were compared with several published data set in the various basins in the Arctic Ocean (Makarov Basin, Middag et al., 2009), the Amundsen Basin (Middag et al., 2009), and the Canada Basin (Giesbrecht et al 2013) which all show very similar results throughout the water column.
        purpose:  This dataset is available to the public for a wide variety of uses including scientific research and analysis.
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          Anchor:  https://www.nsf.gov/awardsearch/showAward?AWD_ID=1439253 Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1439253 Award URL: http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1439253
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              Anchor:  http://lod.bco-dmo.org/id/parameter/1982 Aluminum
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              Anchor:  http://lod.bco-dmo.org/id/parameter/1981 Iron
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              Anchor:  http://lod.bco-dmo.org/id/parameter/490516 Manganese
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                        citedResponsibleParty:  (CI_ResponsibleParty)
                            individualName: (inapplicable)
                            contactInfo:  (CI_Contact)
                                onlineResource:  (CI_OnlineResource)
                                    linkage: https://www.ncei.noaa.gov/archive/accession/0278615/1.1
                                    protocol:  HTTPS
                                    name:  NCEI Accession 0278615 v1.1
                                    description:  published 2023-05-22T04:45:33Z
                                    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.
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  flow injection analyzer
            type:  flow injection analyzer
            description:  automated chemical analysis instrument An instrument that performs flow injection analysis. Flow injection analysis (FIA) is an approach to chemical analysis that is accomplished by injecting a plug of sample into a flowing carrier stream. FIA is an automated method in which a sample is injected into a continuous flow of a carrier solution that mixes with other continuously flowing solutions before reaching a detector. Precision is dramatically increased when FIA is used instead of manual injections and as a result very specific FIA systems have been developed for a wide array of analytical techniques. https://www.bco-dmo.org/instrument/657 (accessed 2018-01-26) Laboratory instrument that analyzes multiple media for ions. The media include various solids and liquids. Models include: QuikChem 8000 Series FIA System
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  fluorometer
            type:  fluorometer
            description:  fluorometer
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  USCGC Healy
            description:  There are two US platforms named HEALY: - 33HQ is the identifier for the USCGC HEALY (operational 1999 to present) - 32H1 is the identifier for USS HEALY (operational 1943-1958). Updated information confirmed in ICES database by NOAA on 21 Jan 2011. PLEASE NOTE: This platform ID (33HQ) *is* the USCGC HEALY that was launched on November 15, 1997. Updated information confirmed in ICES database by NOAA on 21 Jan 2011. Title: USCGC Pennant: WAGB-20 Flag: United States of America Vessel Type: Icebreaker DOB: Nov 1999 IMO: 9083380 The HEALY's home page URL is http://www.uscg.mil/pacarea/healy.
            instrument: (missing)