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Dataset Overview | National Centers for Environmental Information (NCEI)

Dissolved inorganic carbon, total alkalinity, water temperature and salinity collected from surface discrete observations using coulometer, alkalinity titrator and other instruments from the coral reef MAPCO2 buoys at Ala Wai, CRIMP-2, Kaneohe, and Kilo Nalu from 2016-01-08 to 2023-12-08 (NCEI Accession 0176671)

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This dataset contains bottle data for dissolved inorganic carbon (DIC) and total alkalinity (TA) for the period January 2016 through December 2023. The bottle samples were collected approximately every two weeks, weather permitting, from approximately 20 cm below the sea surface at the four buoys comprising our network. Commonly challenging weather and sea state conditions at the Kaneohe buoy have rendered the collection of bottle-validation samples more difficult, hence fewer data are available for this station. Collection of samples at the CRIMP-2, Ala Wai, and Kilo Nalu buoys, however, has been more readily achievable and proportionally more data are available for these buoys.
  • Cite as: Knor, Lucie; Meléndez, Melissa; Howins, Noah; Boeman, Dylan; Lechner, Evan; De Carlo, Eric H.; Sabine, Christopher L. (2018). Dissolved inorganic carbon, total alkalinity, water temperature and salinity collected from surface discrete observations using coulometer, alkalinity titrator and other instruments from the coral reef MAPCO2 buoys at Ala Wai, CRIMP-2, Kaneohe, and Kilo Nalu from 2016-01-08 to 2023-12-08 (NCEI Accession 0176671). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/pe6v-qg74. Accessed [date].
gov.noaa.nodc:0176671
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Distribution Formats
  • Originator data format
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Distributor NOAA National Centers for Environmental Information
+1-301-713-3277
NCEI.Info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Time Period 2016-01-08 to 2023-12-08
Spatial Bounding Box Coordinates
West: -157.865
East: -157.783
South: 21.28
North: 21.48
Spatial Coverage Map
General Documentation
Associated Resources
Publication Dates
  • publication: 2018-10-10
  • revision: 2024-04-05
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete - production of the data has been completed
Historical archive - data has been stored in an offline storage facility
Data Update Frequency As needed
Supplemental Information
In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number. This most current version of data has 2 sites that were completed in 2021
Purpose Provide validation samples for buoy data in support of the National Ocean Acidification Program
Use Limitations
  • accessLevel: Public
  • 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.
Dataset Citation
  • Cite as: Knor, Lucie; Meléndez, Melissa; Howins, Noah; Boeman, Dylan; Lechner, Evan; De Carlo, Eric H.; Sabine, Christopher L. (2018). Dissolved inorganic carbon, total alkalinity, water temperature and salinity collected from surface discrete observations using coulometer, alkalinity titrator and other instruments from the coral reef MAPCO2 buoys at Ala Wai, CRIMP-2, Kaneohe, and Kilo Nalu from 2016-01-08 to 2023-12-08 (NCEI Accession 0176671). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/pe6v-qg74. Accessed [date].
Cited Authors
Principal Investigators
Contributors
Resource Providers
Publishers
Acknowledgments
  • Funding Information: NOAA Ocean Acidification Program (National Ocean Acidification Observing Network – Oahu’s Linked Kaneohe Bay Observing Sites, NOAONFY2123.Oahu)
  • Funding Information: NOAA Ocean Acidification Program (NOA-ON Oahu NCRMP Class III (DeCarlo, PACIOOS), OAP1819-1034)
  • Funding Information: NOAA Ocean Acidification Program (OA Mooring Test-beds (Sutton PMEL), 17914)
  • Funding Information: NOAA/Ocean Acidification Program (National Ocean Acidification Observing Network- Oahu NCRMP Class II)
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
Global Change Master Directory (GCMD) Science Keywords OCADS Study Type
  • Discrete measurement
  • Surface measurement
Provider Variable Abbreviations
  • ALKALI
  • AMMONIA_UMOL_L
  • CHLA_MG_M3
  • CTDSAL
  • CTDTMP
  • NITRATE_NITRITE_UMOL_L
  • PHOSPHATE_UMOL_L
  • SILICATE_UMOL_L
  • TCARBN
  • TOTAL_NITROGEN_UMOL_L
  • TOTAL_PHOSPHOROUS_UMOL_L
Data Center keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords
Place keywords NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords Provider Geographic Names
  • Kaneohe Bay, Oahu, Hawaii
  • Mamala Bay, Oahu, Hawaii
  • North Pacific Ocean
Project keywords NODC PROJECT NAMES THESAURUS Ocean Acidification Search Keywords
  • Ocean Acidification Program (OAP)
  • Ocean Carbon and Acidification Data System (OCADS) Project
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Knor, Lucie; Meléndez, Melissa; Howins, Noah; Boeman, Dylan; Lechner, Evan; De Carlo, Eric H.; Sabine, Christopher L. (2018). Dissolved inorganic carbon, total alkalinity, water temperature and salinity collected from surface discrete observations using coulometer, alkalinity titrator and other instruments from the coral reef MAPCO2 buoys at Ala Wai, CRIMP-2, Kaneohe, and Kilo Nalu from 2016-01-08 to 2023-12-08 (NCEI Accession 0176671). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/pe6v-qg74. Accessed [date].
Access Constraints
  • 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.
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.
Lineage information for: dataset
Processing Steps
  • 2018-10-10T22:20:30Z - NCEI Accession 0176671 v1.1 was published.
  • 2019-08-28T22:01:26Z - NCEI Accession 0176671 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.
  • 2020-07-10T18:25:31Z - NCEI Accession 0176671 was revised and v3.3 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.
  • 2022-05-06T21:47:35Z - NCEI Accession 0176671 was revised and v4.4 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.
  • 2023-03-20T19:16:38Z - NCEI Accession 0176671 was revised and v5.5 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.
  • 2024-04-05T20:35:06Z - NCEI Accession 0176671 was revised and v6.6 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.
Output Datasets
Lineage information for: dataset
Processing Steps
  • Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: TCARBN; Unit: µmol/kg; Observation type: time-series (discrete sampling at MAPCO2 sites); Measured or calculated: Measured; Calculation method and parameters: not calculated; Sampling instrument: 500 ml borosilicate bottles, collected by hand; Analyzing instrument: Jan 2016- August 2018: Mariana Vinta 3D; Since September 2018: Apollo AS-C3 DIC Analyzer and LI-COR LI-7000 CO2 Analyzer; Detailed sampling and analyzing information: Sampling procedure: Bottle rinsed 3 times with seawater, sample taken 20 cm below the surface, a headspace of 20-25 ml is left, sample is spiked with HgCl2, and bottles are sealed with apiezon grease and secured with rubber bands and plastic clamps. Analysis procedure Jan 2016 - August 2018: Sample is placed in waterbath at 20 degrees celcius, before sample analysis, junk seawater samples and blanks are measured until the instrument is stable, then a CRM is measured. All bottles are measured in duplicate, and a triplicate is added if the difference between duplicates is more than 3µmol/kg. Every 3 sample bottles (usually after 6 runs), a CRM is measured to check for stability of the instrument. DIC samples for CRIMP-2 between 06/02/16 and 3/12/17 were measured at SIO using a default salinity of 35. For all other DIC samples, buoy or conductivity probe measurements were used to determine salinity. Analysis procedure since September 2018: Before sample analysis, junk seawater samples were measured until the instrument was stable, then a calibration curve was run using the reference value in µmol/L (calculated from reported CRM salinty and temperaure in the bottle at the time of analysis, measured with a hand-held Fluke 51 II thermometer). All samples were run 4-5 times with 0.75mL volume, until three repeats were <0.05% apart. Every three sample bottles, a CRM was run, and the instrument was recalibrated approximately every 4 hours. Density was calculated using sample salinity from the buoy measurement at the time of sampling when available, and using salinity measured with a VanEssen CTD Diver in the laboratory otherwise; and using temperature of the bottle at the time of analysis measured with a hand-held Fluke 51 II thermometer as well.; Replicate information: Single samples collected, duplicates or triplicates run from the same bottle.; Standardization description: Jan 2016-August 2018: Batch correction with CRMs. Since September 2018: Back-calculation of acid concentration using the reported CRM value as a “True value” with a standardization curve at three different concentrations (built-in standardization function in LabView program).; Standardization frequency: CRM run every three sample bottles. Since September 2018: CRM run every three sample bottles; Restandardization every 4 hours.; CRM manufacturer: Andrew Dickson's lab at Scripps Institute of Oceanography; CRM batch number: 161, 162, 175, 179, 197, 198, 201; Preservation method: HgCl2 saturated solution; Preservative volume: 200 µL mercury chloride added to 500 mL sample; Preservative correction: no poisoning correction applied; Uncertainty: Jan 2016- August 2018: 2 µmol/kg; 2019: 3.0 µmol/kg; 2020: 1.8 µmol/kg; 2021: 1.4 µmol/kg, 2022: 3.2 µmol/kg; 2023: 4.4 µmol/kg; Quality flag convention: 2: good data, 3: questionable data or climatological salinity values, 4: bad data; Method reference: Used coulometric method (2016-2018) and infrared detection method (since Sept 2018) from Dickson, A.G., Sabine, C.L. and Christian, J.R. (Eds.) 2007. Guide to best practices for ocean CO2 measurements. PICES Special Publication 3, 191 pp.; Researcher name: Jan 2016- May 2019: Eric DeCarlo; Since May 2019: Christopher Sabine; Researcher institution: University of Hawaii at Manoa.
  • Parameter or Variable: Total alkalinity; Abbreviation: ALKALI; Unit: µmol/kg; Observation type: time-series (discrete sampling at MAPCO2 sites); Measured or calculated: Measured; Calculation method and parameters: not calculated; Sampling instrument: 500 ml borosilicate bottles, collected by hand; Analyzing instrument: Jan 2016 - August 2018: Metrohm Titrando 905 alkalinity titrator; Since September 2018: Metrohm 875 Dosimat plus alkalinity titrator; Type of titration: potentiometric titration; Cell type (open or closed): Open; Curve fitting method: Jan 2016 - August 2018: modified Gran approach; Since September 2018: non-linear least squares (NLLS); Detailed sampling and analyzing information: Sampling Procedure: bottle rinsed 3 times with seawater, sample taken 20 cm below the surface, a headspace of 20-25 ml is left, sample is spiked with HgCl2, and bottles are sealed with apiezon grease and secured with rubber bands and plastic clamps. Analysis procedure Jan 2016 - August 2018: The sample is placed in temperature controlled bath at 25 celcius, then approximately 80 grams of sample is weighed and titrated with 0.1 N HCl in 35 g/L NaCl solution. The electrode is calibrated prior to analyses, and only a slope >99% is accepted. All bottles are measured in duplicate, and a triplicate is added if the difference between duplicates is >3µmol/kg. Analysis Procedure since September 2018: The sample is placed in temperature controlled bath at 20 celcius, then approximately 100 grams of sample is weighed and titrated in a 20-point titration with certified ~0.1 N HCl in 35 g/L NaCl solution. All bottles are measured in duplicate, and a triplicate is added if the difference between duplicates is >3µmol/kg.; Replicate information: Single samples collected, duplicates or triplicates run from the same bottle.; Standardization description: Jan 2016-August 2018: Back-calculation of acid concentration using the reported CRM value as a “True value”. Since September 2018: CRMs only as check standards to track performance and calculate uncertainty, no standardization needed with Dosimat calibration, certified acid, and .; Standardization frequency: CRM run every three sample bottles.; CRM manufacturer: Andrew Dickson's lab at Scripps Institute of Oceanography; CRM batch number: 161, 162, 173, 179, 197, 198, 201; Preservation method: HgCl2 saturated solution; Preservative volume: 200 µL mercury chloride added to 500 mL sample; Preservative correction: no correction.; TA blank correction: no correction.; Uncertainty: Jan 2016 - September 2019: 3 µmol/kg; 2020: 2.1 umol/kg; 2023: 4.5 µmol/kg; Quality flag convention: 2: good data, 3: questionable data, 4: bad data; Method reference: Used method from Dickson, A.G., Sabine, C.L. and Christian, J.R. (Eds.) 2007. Guide to best practices for ocean CO2 measurements. PICES Special Publication 3, 191 pp.; Researcher name: Jan 2016 - August 2018: Eric DeCarlo; Since September 2018: Christopher Sabine; Researcher institution: University of Hawaii at Manoa.
  • Parameter or Variable: Salinity; Abbreviation: CTDSAL; Unit: on Practical Salinity Scale; Observation type: time-series (discrete sampling and moored instrumentation at MAPCO2 sites); Sampling instrument: Moored SBE 16V2 or SBE 37, Since September 2018: VanEssen CTD Diver when moored sensor wasn't available.; Uncertainty: 0.05 (SBE), or 1% of conductivity value (CTD Diver); Quality flag convention: 2: good data, 3: questionable data/VanEssen CTD Diver, 4: bad data.
  • Parameter or Variable: Sea surface temperature; Abbreviation: CTDTMP; Unit: Degrees Celsius; Observation type: time-series (moored instrumentation at MAPCO2 sites); Sampling instrument: SBE 16V2 or SBE 37.
  • Parameter or Variable: Total Nitrogen; Abbreviation: TOTAL_NITROGEN_UMOL_L; Unit: UMOL_L.
  • Parameter or Variable: Total phosphorous in µmol/L; Abbreviation: TOTAL_PHOSPHOROUS_UMOL_L; Unit: UMOL_L.
  • Parameter or Variable: Phosphate in µmol/L; Abbreviation: PHOSPHATE_UMOL_L; Unit: UMOL_L.
  • Parameter or Variable: Silicate in µmol/L; Abbreviation: SILICATE_UMOL_L; Unit: UMOL_L.
  • Parameter or Variable: Nitrate and nitrite in µmol/L; Abbreviation: NITRATE_NITRITE_UMOL_L; Unit: UMOL_L.
  • Parameter or Variable: Ammonia in µmol/L; Abbreviation: AMMONIA_UMOL_L; Unit: UMOL_L.
  • Parameter or Variable: Chlorophyll-a in mg/m^3; Abbreviation: CHLA_MG_M3; Unit: mg/m^3 .
Acquisition Information (collection)
Instrument
  • bottle
  • coulometer for DIC measurement
  • thermosalinograph
  • titrator
Last Modified: 2024-04-11T06:50:57Z
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