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Dataset Overview | National Centers for Environmental Information (NCEI)

LDEO Database (Version 2019): Global Ocean Surface Water Partial Pressure of CO2 Database: Measurements Performed During 1957-2019 (NCEI Accession 0160492)

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Approximately 14.2 million measurements of surface water pCO2 made over the global oceans during 1957-2019 have been processed to make a uniform data file in this Version 2019. Measurements made in open oceans as well as in coastal waters are included. The data assembled include only those measured using equilibrator-CO2 analyzer systems, and have been quality-controlled based upon the stability of the system performance, the reliability of calibrations for CO2 analysis and the internal consistency of data. We have added 567,632 data points comprised of 158 leg/cruise segments in this version. All of these were collected on the 4 ships in our current field program. These 4 ships operate primarily in high latitudes in both hemispheres and have built decades long records in these areas. R/V Nathaniel B. Palmer’s system has been operating since 1995, R/V Laurence M. Gould’s system since 2001, USCGC Healy since 2011, R/V M. Langseth since 2010 (terminated in 2018), and R/V Sikuliaq since 2015. Our contribution to this database through many years of 3.31 million records is primarily for the polar and sub-polar seas. These underway data have been quality controlled and corrected for the time lag and temperature differences between the water intake and pCO2 measurements. In order to allow re-examination of the data in the future, a number of measured parameters relevant to pCO2 in seawater are listed. The overall uncertainty for the pCO2 values listed is estimated to be ± 2.5 uatm on the average. The names and institutional affiliations of the contributors are listed in Table 1. The documentation for the previous versions (V1.0, V2007, V2008, V2009, V2010, V2011, V2012, V2013, V2014, V2015, V2016, V2017, and V2018) of our database are available at NCEI via Ocean Carbon data System (OCADS) LDEO Database web page.

The global pCO2 dataset is available free of charge as a numeric data package (NDP) from the OCADS: https://www.ncei.noaa.gov/access/ocean-carbon-data-system/oceans/LDEO_Underway_Database/. The NDP consists of the oceanographic data files and this printed documentation, which describes the procedures and methods used to obtain the data.
  • Cite as: Takahashi, Taro; Sutherland, Stewart C.; Kozyr, Alex (2017). LDEO Database (Version 2019): Global Ocean Surface Water Partial Pressure of CO2 Database: Measurements Performed During 1957-2019 (NCEI Accession 0160492). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.3334/cdiac/otg.ndp088(v2015). Accessed [date].
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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 1957-01-01 to 2019-12-31
Spatial Bounding Box Coordinates
West: -180
East: 180
South: -78.682
North: 88.453
Spatial Coverage Map
General Documentation
Associated Resources
Publication Dates
  • publication: 2017-02-19
  • revision: 2020-11-14
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.
Purpose This dataset is available to the public for a wide variety of uses including scientific research and analysis.
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: Takahashi, Taro; Sutherland, Stewart C.; Kozyr, Alex (2017). LDEO Database (Version 2019): Global Ocean Surface Water Partial Pressure of CO2 Database: Measurements Performed During 1957-2019 (NCEI Accession 0160492). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.3334/cdiac/otg.ndp088(v2015). Accessed [date].
Cited Authors
Principal Investigators
Contributors
Resource Providers
Publishers
Acknowledgments
  • Funding Information: NSF
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
Data Base Information
  • LDEO Database Version 2016
  • LDEOv2016
  • NDP-088(V2016)(
Global Change Master Directory (GCMD) Science Keywords OCADS Study Type
  • Surface underway
Provider Keywords
  • LDEO Database
  • LDEOv2018
Provider Variable Abbreviations
  • EQ_PBARO
  • PCO2_SST
  • PCO2_SSTPA
  • PCO2_TEQ
  • PCO2_TMP
  • SHIPPBARO
  • SSS
  • SST
  • VCO2_SW
Data Center keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS Global Change Master Directory (GCMD) Data Center Keywords
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
  • World Ocean
Project keywords Cruise ID
  • LDEO19570101
EXPOCODE
  • LDEO19570101
Ocean Acidification Search Keywords
  • Ocean Carbon and Acidification Data System (OCADS) Project
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Takahashi, Taro; Sutherland, Stewart C.; Kozyr, Alex (2017). LDEO Database (Version 2019): Global Ocean Surface Water Partial Pressure of CO2 Database: Measurements Performed During 1957-2019 (NCEI Accession 0160492). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.3334/cdiac/otg.ndp088(v2015). 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
  • 2017-02-19T09:03:16Z - NCEI Accession 0160492 v1.1 was published.
  • 2017-08-04T23:16:21Z - NCEI Accession 0160492 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.
  • 2017-09-15T00:27:10Z - NCEI Accession 0160492 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.
  • 2018-02-10T01:39:39Z - NCEI Accession 0160492 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.
  • 2018-02-13T20:53:45Z - NCEI Accession 0160492 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.
  • 2018-02-15T21:05:47Z - NCEI Accession 0160492 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.
  • 2019-03-27T05:26:44Z - NCEI Accession 0160492 was revised and v7.7 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.
  • 2019-06-25T21:34:21Z - NCEI Accession 0160492 was revised and v8.8 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.
  • 2020-11-14T22:34:23Z - NCEI Accession 0160492 was revised and v9.9 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: VCO2_SW; Abbreviation: VCO2_SW; Unit: PPM (Mole fraction concentration of CO2 (ppm) in dried air); Controlled vocabulary name: partial pressure of carbon dioxide - water; In-situ / Manipulation / Response variable: in-situ.
  • Parameter or Variable: PCO2_TMP; Abbreviation: PCO2_TMP; Unit: Temperature at which pCO2 was measured in DEG_C; Controlled vocabulary name: partial pressure of carbon dioxide - water; In-situ / Manipulation / Response variable: in-situ.
  • Parameter or Variable: SST; Abbreviation: SST; Unit: Sea Surface Temperature in DEG_C; Controlled vocabulary name: SEA SURFACE TEMPERATURE; In-situ / Manipulation / Response variable: in-situ.
  • Parameter or Variable: SSS; Abbreviation: SSS; Unit: Sea Surface Salinity; Controlled vocabulary name: SALINITY; In-situ / Manipulation / Response variable: in-situ.
  • Parameter or Variable: PCO2_SST; Abbreviation: PCO2_SST; Unit: UATM (Partial Pressure of CO2 in seawater at the temperature in the SST column); Controlled vocabulary name: partial pressure of carbon dioxide - water; In-situ / Manipulation / Response variable: in-situ.
  • Parameter or Variable: PCO2_SSTPA; Abbreviation: PCO2_SSTPA; Unit: Partial Pressure of CO2 in seawater (in units of Pascals) at the temperature in the SST column; Controlled vocabulary name: partial pressure of carbon dioxide - water; In-situ / Manipulation / Response variable: in-situ.
  • Parameter or Variable: PCO2_TEQ; Abbreviation: PCO2_TEQ; Unit: UATM (Partial Pressure of CO2 in seawater at the temperature in thePCO2_TMP column. This is ordinarily the value that is actually measured; Controlled vocabulary name: partial pressure of carbon dioxide - water; In-situ / Manipulation / Response variable: in-situ.
  • Parameter or Variable: EQ_PBARO; Abbreviation: EQ_PBARO; Unit: Pressure in the equilibration vessel in units of millibars; In-situ / Manipulation / Response variable: in-situ.
  • Parameter or Variable: SHIPPBARO; Abbreviation: SHIPPBARO; Unit: Barometric pressure in the outside air from the ship’s observation system in units of millibars; In-situ / Manipulation / Response variable: in-situ .
Acquisition Information (collection)
Instrument
  • carbon dioxide (CO2) gas analyzer
Last Modified: 2024-03-25T12:22:55Z
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