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Dissolved inorganic carbon (DIC), total alkalinity, pH on total scale, partial pressure of carbon dioxide (pCO2), temperature, salinity and other hydrographic and chemical variables collected from discrete samples and profile observations during the R/V Thomas G. Thompson cruise CLIVAR_P16N_2006 (EXPOCODE 325020060213) in the Pacific Ocean from 2006-02-13 to 2006-03-30 (NCEI Accession 0108062)


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            title:  Dissolved inorganic carbon (DIC), total alkalinity, pH on total scale, partial pressure of carbon dioxide (pCO2), temperature, salinity and other hydrographic and chemical variables collected from discrete samples and profile observations during the R/V Thomas G. Thompson cruise CLIVAR_P16N_2006 (EXPOCODE 325020060213) in the Pacific Ocean from 2006-02-13 to 2006-03-30 (NCEI Accession 0108062)
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                date:  2013-06-05
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                date:  2016-12-20
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                  Anchor:  DOI 10.25921/bvaz-zm17
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        abstract:  This dataset includes discrete profile measurements of dissolved inorganic carbon (DIC), total alkalinity, pH on total scale, partial pressure of carbon dioxide (pCO2), dissolved organic carbon (DOC), temperature, salinity, oxygen, nutrients and chlorofluorocarbons (CFC-11, CFC-12, CFC113) obtained during the R/V Thomas G. Thompson cruise CLIVAR_P16N_2006 (EXPOCODE 325020060213) in the Pacific Ocean from 2006-02-13 to 2006-03-30. The International CLIVAR Global Ocean Carbon and Repeat Hydrography Program carries out a systematic and global re-occupation of select WOCE/JGOFS hydrographic sections to quantify changes in storage and transport of heat, fresh water, carbon dioxide (CO2), and related parameters.
        purpose:  This dataset is available to the public for a wide variety of uses including scientific research and analysis.
        credit:  Funding Information: NOAA Climate Program
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                title:  Global Change Master Directory (GCMD) Instrument Keywords
                date:  (CI_Date)
                    date:  2023
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                edition:  17
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                            name:  GCMD Keyword Forum Page
                            description:  Global Change Master Directory (GCMD). 2023. GCMD Keywords, Version 17. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords
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            keyword:
              Anchor:  https://vocab.ices.dk/services/pox/GetCodeDetail/SHIPC/3250 THOMAS G. THOMPSON (call sign: KTDQ, ICES code: 3250, 1991)
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                title:  ICES/SeaDataNet Ship Codes
                date: (inapplicable)
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            keyword:
              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/5488b1cc-08b2-41cf-9bd2-4a2cdd0990de OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN
            keyword:
              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/9972bea3-3817-44e8-9c14-bcda7750d820 OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > GULF OF ALASKA
            keyword:
              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/fa0ec8a7-ebed-4f2d-834b-1fa6a1c2e0ed OCEAN > PACIFIC OCEAN > SOUTH PACIFIC OCEAN
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                title:  Global Change Master Directory (GCMD) Location Keywords
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                            description:  Global Change Master Directory (GCMD). 2023. GCMD Keywords, Version 17. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords
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            keyword:  Pacific Ocean
            type:  (MD_KeywordTypeCode) place
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                title:  Provider Geographic Names
                date: (inapplicable)
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            useLimitation:  accessLevel: Public
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            otherConstraints:  Cite as: Feely, Richard A.; Sabine, Christopher L.; Millero, Frank J.; Langdon, Chris; Fine, Rana A.; Bullister, John L.; Hansell, Dennis A.; Carlson, Craig A.; McNichol, Ann; Key, Robert M.; Byrne, Robert H.; Wanninkhof, Rik (2013). Dissolved inorganic carbon (DIC), total alkalinity, pH on total scale, partial pressure of carbon dioxide (pCO2), temperature, salinity and other hydrographic and chemical variables collected from discrete samples and profile observations during the R/V Thomas G. Thompson cruise CLIVAR_P16N_2006 (EXPOCODE 325020060213) in the Pacific Ocean from 2006-02-13 to 2006-03-30 (NCEI Accession 0108062). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/bvaz-zm17. Accessed [date].
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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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            otherConstraints:  Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
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                title:  Feely R. A., C. L. Sabine, F. J. Millero, C. Langdon, A. G. Dickson , R. A. Fine, J. L. Bullister, D.A. Hansell, C. A. Carlson, A. P. McNichol, R. M. Key, R. H. Byrne, and R. Wanninkhof (2008). Carbon Dioxide, Hydrographic, and Chemical Data Obtained During the R/Vs Roger Revelle and Thomas G. Thompson Repeat Hydrography Cruises in the Pacific Ocean: CLIVAR CO2 Sections P16S_2005 (6 January - 19 February 2005) and P16N_2006 (13 February - 30 March, 2006). Ed. A. Kozyr. ORNL/CDIAC-155, NDP-090. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 54 pp.
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                    date:  2008
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                    individualName:  Feely R. A., C. L. Sabine, F. J. Millero, C. Langdon, A. G. Dickson , R. A. Fine, J. L. Bullister, D.A. Hansell, C. A. Carlson, A. P. McNichol, R. M. Key, R. H. Byrne, and R. Wanninkhof
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                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/179 Carbon Dioxide Information Analysis Center (CDIAC)
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                    name:  Ocean CO2
                otherCitationDetails:  [retrieved from https://cdiac.ess-dive.lbl.gov/ftp/ndp090/]
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                title:  CLIVAR Repeat Section P16N
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                    date:  2022
                    dateType:  (CI_DateTypeCode) publication
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                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 US DOC; NOAA; NESDIS; National Centers for Environmental Information (NCEI)
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                title:  NOAA National Centers for Environmental Information (2022). Ocean Carbon and Acidification Data System (OCADS). NOAA National Centers for Environmental Information. https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
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                    date:  2022-04
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                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 NOAA National Centers for Environmental Information
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                otherCitationDetails:  [accessed 2024-02-08]
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                westBoundLongitude:  -153.2202
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                northBoundLatitude:  56.2802
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                  TimePeriod:
                    beginPosition:  2006-02-13
                    endPosition:  2006-03-30
        supplementalInformation:  These data were acquired by NCEI from the Carbon Dioxide Information Analysis Center (CDIAC) in accordance with an archival submission agreement between CDIAC and NCEI. In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number.
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 NOAA National Centers for Environmental Information
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                        voice:  +1-301-713-3277
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                        electronicMailAddress:  NCEI.Info@noaa.gov
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                fees:  In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
                orderingInstructions:  Contact NCEI for other distribution options and instructions.
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                    linkage: https://doi.org/10.25921/bvaz-zm17
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                    linkage: https://www.ncei.noaa.gov/archive/accession/oas/108062
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                    linkage: ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0057/0108062/
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                description:  NCEI Accession 0108062 v1.1 was published.
                dateTime:
                  DateTime:  2013-06-05T19:58:10Z
                output:  (LE_Source)
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                        title:  NCEI Accession 0108062 v1.1
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                                    name:  NCEI Accession 0108062 v1.1
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                description:  NCEI Accession 0108062 was revised and v2.2 was published.
                rationale:  Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession.
                dateTime:
                  DateTime:  2016-12-20T19:51:13Z
                output:  (LE_Source)
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                        title:  NCEI Accession 0108062 v2.2
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                                    name:  NCEI Accession 0108062 v2.2
                                    description:  published 2016-12-20T19:51:13Z
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                description:  Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: TCARBN; Unit: UMOL/KG; Observation type: discrete; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Replicate information: Over 200 replicate samples were analyzed with a precision of 1.05 μmol/kg.; Standardization description: The coulometers were each calibrated by injecting aliquots of pure CO2 (99.99%) by means of an 8-port valve outfitted with two sample loops. The instruments were calibrated at the beginning and end of each station with a set of the gas loop injections.; CRM batch number: 73.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Total alkalinity; Abbreviation: ALKALI; Unit: UMOL/KG; Observation type: discrete; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Type of titration: potentiometric titration with a 0.7 M NaCl filling solution in the reference electrode to maintain a consistent junction potential between the solution and electrode; Cell type (open or closed): 2 TA systems consisting of ~ 200 mL plexiglass water jacketed closed cell; Curve fitting method: The fitting is performed using the STEPIT routine (J.P. Chandler, Oklahoma State University, Stillwater, OK 74074). The STEPIT software package minimizes the sum of squares of residuals by adjusting the parameters E*, TA, TCO2 and pK1.; Uncertainty: 1) TA(meas)- TA (crm)= -1.17 +/- 4.34 μmol/kg with n=125 2) TA(sys1) - TA(sys2) = 1.76 +/- 1.30 μmol/kg with n=61 3) delta TA(same sys) = 0.78 +/- 0.68 μmol/kg with n=124; Method reference: Dickson, A. G. 1981. An exact definition of total alkalinity and a procedure for the estimation of alkalinity and total inorganic carbon from titration data. Deep Sea Research Part A. Oceanographic Research Papers 28: 609.[ https://doi.org/10.1016/0198-0149(81)90121-7]; Johansson, O., and M. Wedborg. 1982. On the evaluation of potentiometric titrations of seawater with hydrochloric acid. Oceanol. Acta 5: 209-218; Millero, F. J., J.-Z. Zhang, K. Lee, and D. M. Campbell. 1993. Titration alkalinity of seawater. Marine Chemistry 44: 153.[ https://doi.org/10.1016/0304-4203(93)90200-8].
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: pH; Abbreviation: PH_TOT; pH scale: total scale; Observation type: discrete; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Temperature of pH measurement: 25C; Detailed sampling and analyzing information: Two different groups - University of Miami (UM) and University of South Florida (USF) - measured pH using slightly different spectrophotometric techniques on P16N leg 1. Only the USF group measured pH on P16N leg 2. The pH measurements from both groups are reported on the total scale at 25°C. Note: In the master data file p16n_2006a_hy.csv at CDIAC and CCHDO, the pH measurements from UM group reported for leg 1 (stations 1 - 43) and from USF for leg 2 (stations 44 - 84). The separate file p16n_2006a_all_ph.csv with all pH measurements from both groups is archived at NCEI at https://www.ncei.noaa.gov/archive/accession/0108062. The pH measurements of seawater were made using the spectrophotometric techniques of Clayton and Byrne (1993). The pH of the samples using the m-cresol purple (mCP).; Uncertainty: pH(CRM 73) = 7.8417 +/- 0.0020 pH(TRIS) = 8.0525 +/- 0.0033 with n=32.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: pCO2 (fCO2) discrete; Abbreviation: FCO2; Unit: UATM; Observation type: discrete; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Storage method: Samples were drawn from Niskin bottles into 500 ml volumetric flasks using Tygon® tubing with a Silicone adapter that fit over the petcock to avoid contamination of DOM samples. Bottles were rinsed while inverted and filled from the bottom, overflowing half a volume while taking care not to entrain any bubbles. About 5 ml of water was withdrawn to allow for expansion of the water as it warms and to provide space for the stopper, tubing, and frit of the analytical system. Saturated mercuric chloride solution (0.2 ml) was added as a preservative. The sample bottles were sealed with a screw cap containing a polyethylene liner. The samples were stored in coolers at room temperature generally for no more than 5 hours.; Seawater volume: 500 mL; Headspace volume: 70 mL; Temperature of measurement: 20C; Detailed sampling and analyzing information: The discrete pCO2 system is patterned after the instrument described in Chipman et al. (1993) and is discussed in detail in Wanninkhof and Thoning (1993) and Chen et al. (1995). The major difference between the two systems is that Wanninkhof instrument uses a LI-COR® (model 6262) non-dispersive infrared analyzer, while the Chipman instrument utilizes a gas chromatograph with a flame ionization detector.; Sample replicate information: Generally when samples were taken, flasks were drawn on all the Niskins including four duplicates. Two of the duplicates were analyzed at different temperatures; Temperature correction method: See Peng et al., 1987; Uncertainty: Three types of duplicates were taken. The average difference: [ABS(sample 1-sample2)/(sample 1+sample 2) * 100], std. dev. and number for the three types are listed below: Duplicates run at 20 C: av. dif. =0.3 +/- 0.23% n = 33 (one value omitted) Duplicates run at 12 C: av. dif. = 0.3 +/- 0.18 % n= 23 (one value omitted) Duplicates run at 12 C and 20 C* av. dif = 0.7 +/- 0.75 % n= 59 (two values omitted) The omitted values were because of a problem in analysis in one of the duplicates *The duplicates run at different temperatures were normalized to 20 C and compared. Normalization was performed using the constants and procedures as outlined in Peng et al. 1987 as incorporated in the GW BASIC data reduction program. Of note is that using the constants as refit by Dickson and Millero and the salinity dependence of borate as proposed by Dickson gave an average difference of 1%, that is, these constants yielded worse agreement in temperature normalization.; Method reference: Wanninkhof, R., & Thoning, K. (1993). Measurement of fugacity of CO2 in surface water using continuous and discrete sampling methods. Marine Chemistry, 44(2–4), 189–204. https://doi.org/10.1016/0304-4203(93)90202-y.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: PH_TMP; Abbreviation: PH_TMP; Unit: DEG_C; Controlled vocabulary name: pH; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: FCO2_TMP; Abbreviation: FCO2_TMP; Unit: DEG_C; Controlled vocabulary name: partial pressure of carbon dioxide - water; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: CTDTMP; Abbreviation: CTDTMP; Unit: DEG_C; Controlled vocabulary name: WATER TEMPERATURE; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: CTDSAL; Abbreviation: CTDSAL; Controlled vocabulary name: SALINITY; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: SALNTY; Abbreviation: SALNTY; Controlled vocabulary name: SALINITY; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: CTDOXY; Abbreviation: CTDOXY; Unit: UMOL/KG; Controlled vocabulary name: DISSOLVED OXYGEN; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: OXYGEN; Abbreviation: OXYGEN; Unit: UMOL/KG; Controlled vocabulary name: DISSOLVED OXYGEN; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: SILCAT; Abbreviation: SILCAT; Unit: UMOL/KG; Controlled vocabulary name: silicate; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: NITRAT; Abbreviation: NITRAT; Unit: UMOL/KG; Controlled vocabulary name: NITRATE; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: NITRIT; Abbreviation: NITRIT; Unit: UMOL/KG; Controlled vocabulary name: NITRITE; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: PHSPHT; Abbreviation: PHSPHT; Unit: UMOL/KG; Controlled vocabulary name: phosphate; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: CFC-11; Abbreviation: CFC-11; Unit: PMOL/KG; Controlled vocabulary name: CHLOROFLUOROCARBON-11 (CFC-11); In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: CFC-12; Abbreviation: CFC-12; Unit: PMOL/KG; Controlled vocabulary name: CHLOROFLUOROCARBON-12 (CFC-12); In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: CFC113; Abbreviation: CFC113; Unit: PMOL/KG; Controlled vocabulary name: CHLOROFLUOROCARBON-113 (CFC-113); In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: DOC; Abbreviation: DOC; Unit: UMOL/KG; Controlled vocabulary name: DISSOLVED ORGANIC CARBON; In-situ / Manipulation / Response variable: in-situ.
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: TDN; Abbreviation: TDN; Unit: UMOL/KG; Controlled vocabulary name: Total Dissolved Nitrogen (TDN); In-situ / Manipulation / Response variable: in-situ .
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) repository
            levelDescription:  (MD_ScopeDescription)
                other:  NOAA National Centers for Environmental Information
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                description:  NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
                dateTime:
                  DateTime:  2015-04-22T00:00:00
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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.
        maintenanceNote:  NCEI Accession 0108062 was revised and a new version of the archival package was published. Updates to existing archival packages may provide additional files or replace obsolete files. The latest version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession. Please see journal.txt in the /about directory for additional details on changes made.
        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:  carbon dioxide (CO2) gas analyzer
            type:  carbon dioxide (CO2) gas analyzer
            description:  measures gaseous carbon dioxide Carbon dioxide gas analyzer has often been referred to as LI-COR, because a lot of researchers choose to use products manufactured by LI-COR incorporation for their carbon dioxide measurement. The main component of a carbon dioxide analyzer is a nondispersive infrared (NDIR) spectroscopic sensors to detect CO2 in a gaseous environment by its characteristic absorption. Carbon dioxide (CO2) gas analyzer works together with carbon dioxide (CO2) equilibrator (insttypes_id 184) to measure carbon dioxide in the water. To measure water carbon dioxide, water needs to be continuously supplied to a showerhead inside an equilibrator. As the water flows through the equilibrator chamber, dissolved carbon dioxide exchanges quickly with air in the headspace. This air is then sampled by the carbon dioxide analyzer to determine the mole fraction of CO2 in water.
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  coulometer for DIC measurement
            type:  coulometer for DIC measurement
            description:  measures dissolved inorganic carbon (DIC) A known amount of seawater is dispensed into a stripping chamber where it is acidified and purged with an inert gas. The amount of CO2 in the resulting gas stream is determined by absorbing the CO2 in an absorbent. The pH of the solution is monitored by measuring the transmittance .
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  CTD
            type:  CTD
            description:  Conductivity-Temperature-Depth probe
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  flask with closed headspace for discrete CO2 measurement
            type:  flask with closed headspace for discrete CO2 measurement
            description:  discrete carbon dioxide (CO2) measurement
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  spectrophotometer
            type:  spectrophotometer
            description:  spectrophotometer, optical spectrometer, spectrograph or spectroscope An optical spectrometer (spectrophotometer, spectrograph or spectroscope) is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum, typically used in spectroscopic analysis to identify materials. Butler, L. R. P.; Laqua, K. (1995). "Nomenclature, symbols, units and their usage in spectrochemical analysis-IX. Instrumentation for the spectral dispersion and isolation of optical radiation (IUPAC Recommendations 1995)". Pure Appl. Chem. IUPAC. 67 (10): 1725–1744. doi:10.1351/pac199567101725. A spectrometer is the general term for describing a combination of spectral apparatus with one or more detectors to measure the intensity of one or more spectral bands."
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  titrator
            type:  titrator
            description:  titrator
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  R/V THOMAS G. THOMPSON
            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)
            instrument: (missing)