Dissolved iron speciation from 2013 U.S. GEOTRACES Eastern Pacific Zonal Transect from R/V Thomas G. Thompson TN303 from October-December 2013 (U.S. GEOTRACES EPZT project, EPZT Fe Cu Co project) (NCEI Accession 0278233)
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title: Dissolved iron speciation from 2013 U.S. GEOTRACES Eastern Pacific Zonal Transect from R/V Thomas G. Thompson TN303 from October-December 2013 (U.S. GEOTRACES EPZT project, EPZT Fe Cu Co project) (NCEI Accession 0278233)
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abstract: This dataset contains chemical and physical data collected on R/V Thomas G. Thompson during cruise TN303 from 2013-10-25 to 2013-12-20. These data include Fe, depth, and trace metal concentration. The instruments used to collect these data include BASi Controlled Growth Mercury Electrode, BASi EC-epsilon 2 Autoanalyzer, CTD Sea-Bird, GO-FLO Teflon Trace Metal Bottle, and GeoFish Towed near-Surface Sampler. These data were collected by Dr Kristen N Buck of University of South Florida as part of the "U.S. GEOTRACES East Pacific Zonal Transect (U.S. GEOTRACES EPZT)" and "US GEOTRACES Pacific Section: Measurement of the organic complexation of dissolved iron, copper and cobalt, and total dissolved cobalt (EPZT Fe Cu Co)" projects and "U.S. GEOTRACES (U.S. GEOTRACES)" program. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2017-10-31. The following is the text of the dataset description provided by BCO-DMO: Dissolved iron speciation from 2013 U.S. GEOTRACES Eastern Pacific Zonal Transect Dataset Description: Dissolved iron-binding organic ligand concentrations and conditional stability constants from surface GeoFish and GO-FLO water column samples collected in 2013 during the U.S. GEOTRACES GP16 cruise in the Eastern Pacific between Peru and Tahiti on the R.V. Thomas G. Thompson, cruise TN303. 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. * To access the data with the FISH and BOTTLE data merged, see: http://data.bco-dmo.org/jg/serv/BCO/GEOTRACES/EPZT/Fe_spec_EPZT_joined.html0%7Bdir=data.bco-dmo.org/jg/dir/BCO/GEOTRACES/EPZT/,info=data.bco-dmo.org/jg/info/BCO/GEOTRACES/EPZT/Fe_speciation%7D
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Anchor: http://lod.bco-dmo.org/id/deployment/499719 Eastern Tropical Pacific - Transect from Peru to Tahiti
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useLimitation: Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
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title: Buck, Kristen (2016) Dissolved iron speciation from 2013 U.S. GEOTRACES Eastern Pacific Zonal Transect from R/V Thomas G. Thompson TN303 from October-December 2013 (U.S. GEOTRACES EPZT project, EPZT Fe Cu Co project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). Dataset version 2016-12-07. https://doi.org/10.1575/1912/bco-dmo.718433
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beginPosition: 2013-10-25
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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-coated GO-FLO samplers (General Oceanics) deployed on the GEOTRACES clean CTD rosette system (Cutter and Bruland 2012). 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 GeoFish 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 iron speciation (organic complexation) were collected in 500 mL acid-cleaned Nalgene narrow-mouth fluorinated high-density polyethylene (FPE) bottles that had been filled with Milli-Q for at least two weeks after acid cleaning and rinsed three times with filtered seawater prior to sample collection (Buck et al. 2012). All filtered seawater samples for dissolved iron speciation were frozen at -20 ºC shipboard by the sampling team and shipped to the University of South Florida for laboratory-based analyses post cruise. Dissolved iron speciation (organic complexation) analyses: Dissolved iron speciation (organic complexation) was analyzed using competitive ligand exchange- adsorptive cathodic stripping voltammetry (CLE-AdCSV) with salicylaldoxime as the added competing ligand (Buck et al. 2015), modified from the original Rue and Bruland (1995) method. A borate-ammonium buffer was added to all vials, for a final pH of 8.2 (NBS scale; Buck et al. 2007, 2012). Dissolved iron additions of 0 to 10 nM were used in the titrations, for a total of at least 15 points in each titration. These dissolved iron additions were chosen to match those of the U.S. GEOTRACES North Atlantic dataset and include additional datapoints within this range to allow higher resolution data within titrations (Buck et al. 2016). Deposition times of 90 to 600 s were applied to the analyses, with typically longer deposition times for deeper water column samples. CLE-AdCSV analyses were performed on Bioanalytical Systems (BASi) Controlled Growth Mercury Electrodes (static mercury drop setting, size 14) with Epsilon e2 (BASi) electrochemical analyzers. There are no reference samples available for iron speciation measurements of iron in seawater, though this method has been shown to compare well with other labs and techniques in GEOTRACES intercalibration exercises (Buck et al. 2012, 2016). FLAG: The standard Ocean Data View qualifying flags were used (reference all flags at https://www.bodc.ac.uk/data/codes_and_formats/odv_format/): 1 : Good Value: Good quality data value that is not part of any identified malfunction and has been verified as consistent with real phenomena during the quality control process. [Used when data were shown to be reproducible] 2 : Probably Good Value: Data value that is probably consistent with real phenomena but this is unconfirmed or data value forming part of a malfunction that is considered too small to affect the overall quality of the data object of which it is a part. [Used when the reported value reflects analysis of a single or unverified replicate] 3: Probably Bad Value: Data value recognized as unusual during quality control that forms part of a feature that is probably inconsistent with real phenomena. [Not used] 4: Bad Value: An obviously erroneous data value. [Not used] 5: Changed Value: Data value adjusted during quality control. [Not used] 6 : Value Below Detection Limit: The level of the measured phenomenon was too small to be quantified by the technique employed to measure it. The accompanying value is the detection limit for the technique or zero if that value is unknown. [We report “not_detected” rather than zero or a detection limit value for this case] 7: Value in Excess: The level of the measured phenomenon was too large to be quantified by the technique employed to measure it. The accompanying value is the measurement limit for the technique. [Not used] 8: Interpolated Value: This value has been derived by interpolation from other values in the data object. [Not used] 9: Missing Value: The data value is missing. Any accompanying value will be a magic number representing absent data. [Not used]
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linkage: https://www.ncei.noaa.gov/archive/accession/0278233
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linkage: https://www.ncei.noaa.gov/archive/accession/oas/278233
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DateTime: 2023-05-15T04:11:41Z
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acquisitionInformation: (MI_AcquisitionInformation)
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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.
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description: Use this platform for data attributed to R/V Thomas G. Thompson that were collected between July 1991 and present. R/V Thomas G. Thompson (AGOR-23) Owned by US Navy, leased to University of Washington. Active dates: July 1991 (Source: http://www.navsource.org/archives/09/57/5723.htm, last accessed on 20 Dec 2011)
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