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Dataset Overview | National Centers for Environmental Information (NCEI)

Partial pressure of carbon dioxide, water temperature, salinity and other variables collected from surface underway observations during the R/V Oshoro Maru V cruises in the North Pacific Ocean in 2024 (NCEI Accession 0304367)

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This dataset includes surface underway chemical, meteorological and physical data collected during the R/V Oshoro Maru V cruises in the North Pacific Ocean from 2024-02-20 to 2024-06-25. These data include measurements of sea surface temperature (SST), equilibrator temperature (TEQ), equilibrator pressure (PEQ), mole fraction of carbon dioxide (xCO2) in dry air at TEQ, pCO2 at TEQ (PCO2TEQ). The instruments used to collect these data include carbon dioxide (CO2) gas analyzer and Tandem (bubble+mixer) type equilibrator for autonomous CO2 measurement.
  • Cite as: Aramaki, Takafumi; Nakaoka, Shin-ichiro; Wada, Chisato (2025). Partial pressure of carbon dioxide, water temperature, salinity and other variables collected from surface underway observations during the R/V Oshoro Maru V cruises in the North Pacific Ocean in 2024 (NCEI Accession 0304367). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0304367. Accessed [date].
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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 2024-02-20 to 2024-06-25
Spatial Bounding Box Coordinates
West: 134.6
East: 152.5
South: 32.3
North: 42.9
Spatial Coverage Map
General Documentation
Associated Resources
  • Murphy, P. P., Nojiri, Y., Fujinuma, Y., Wong, C. S., Zeng, J., Kimoto, T., & Kimoto, H. (2001). Measurements of Surface Seawater fCO2 from Volunteer Commercial Ships: Techniques and Experiences from Skaugran. Journal of Atmospheric and Oceanic Technology, 18(10), 1719–1734. https://doi.org/10.1175/1520-0426(2001)018<1719:mossfc>2.0.co;2
  • Chierici, M., Fransson, A., & Nojiri, Y. (2006). Biogeochemical processes as drivers of surface fCO2 in contrasting provinces in the subarctic North Pacific Ocean. Global Biogeochemical Cycles, 20(1). https://doi.org/10.1029/2004gb002356
  • 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
  • Fransson, A., Chierici, M., & Nojiri, Y. (2006). Increased net CO2outgassing in the upwelling region of the southern Bering Sea in a period of variable marine climate between 1995 and 2001. Journal of Geophysical Research, 111(C8). https://doi.org/10.1029/2004jc002759
  • Nakaoka, S., Telszewski, M., Nojiri, Y., Yasunaka, S., Miyazaki, C., Mukai, H., & Usui, N. (2013). Estimating temporal and spatial variation of ocean surface pCO2 in the North Pacific using a self-organizing map neural network technique. Biogeosciences, 10(9), 6093–6106. https://doi.org/10.5194/bg-10-6093-2013
  • Ships Of Opportunity Program (SOOP) Data
Publication Dates
  • publication: 2025-05-19
  • creation: 2025-05-16
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
Purpose The major objectives of this SOOP project is to provide a high quality measurements of atmospheric and sea surface fCO2, sea surface salinity, temperature, and other parameters in the North Pacific Ocean.
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: Aramaki, Takafumi; Nakaoka, Shin-ichiro; Wada, Chisato (2025). Partial pressure of carbon dioxide, water temperature, salinity and other variables collected from surface underway observations during the R/V Oshoro Maru V cruises in the North Pacific Ocean in 2024 (NCEI Accession 0304367). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0304367. Accessed [date].
Cited Authors
Principal Investigators
Contributors
Resource Providers
Publishers
Acknowledgments
  • Funding Information: National Institute for Environmental Studies (NIES)
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
Global Change Master Directory (GCMD) Science Keywords OCADS Study Type
  • Surface underway
Provider Variable Abbreviations
  • SLP
  • SSS
  • SST_C
  • pCO2_SST
Data Center keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS Global Change Master Directory (GCMD) Data Center Keywords
Platform keywords NODC PLATFORM NAMES THESAURUS Global Change Master Directory (GCMD) Platform Keywords ICES/SeaDataNet Ship Codes
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
  • Japan Sea
  • North Pacific Ocean
Project keywords NODC PROJECT NAMES THESAURUS Cruise ID
  • SOOP Lines
EXPOCODE
  • 49OX20240220
  • 49OX20240318
  • 49OX20240423
  • 49OX20240513
  • 49OX20240610
  • 49OX20240615
Ocean Acidification Search Keywords
  • Ocean Carbon and Acidification Data System (OCADS) Project
Reference Section ID
  • SOOP
Research Projects
  • Ship Of Opportunity Program (SOOP)
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Aramaki, Takafumi; Nakaoka, Shin-ichiro; Wada, Chisato (2025). Partial pressure of carbon dioxide, water temperature, salinity and other variables collected from surface underway observations during the R/V Oshoro Maru V cruises in the North Pacific Ocean in 2024 (NCEI Accession 0304367). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0304367. 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
  • 2025-05-19T16:29:58Z - NCEI Accession 0304367 v1.1 was published.
Output Datasets
Lineage information for: dataset
Processing Steps
  • Parameter or Variable: pCO2 (fCO2) autonomous; Abbreviation: pCO2_SST; Unit: uatm; Observation type: Surface underway; Measured or calculated: Measured; Sampling instrument: water collection with pump; Location of seawater intake: bottom at stern; Depth of seawater intake: 5 m; Analyzing instrument: Kimoto Portable carbon dioxide analyzer; Detailed sampling and analyzing information: NDIR measurement of dry base xCO2 in seawater equilibrated air. NIES observation method generally fulfills the SOP criteria.; Equilibrator type: Tandem (bubble+mixer) type; Equilibrator volume: 30 L; Is the equilibrator vented or not: Vented; Water flow rate: 20 L/min; Gas flow rate: 0.5 L/min; SEA CO2 gas detector manufacturer: Licor, Inc; SEA CO2 gas detector model: CO2-14 using LI-850 CO2 Analyzer manufactured by LI-COR; SEA CO2 gas detector resolution: 0.1 ppm; SEA CO2 gas detector uncertainty: 0.1 ppm; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Method reference: Murphy et al. (2001, J. Atmos. Ocn. Tech.), Chierici et al. (2006, Global Biogeochem. Cy.), Fransson et al. (2006, J. Geophys. Res ), Nakaoka et al. (2013, Biogeosci.); QC steps: Yes
  • Parameter or Variable: Sea Surface Temperature; Abbreviation: SST_C; Unit: degrees celcius; Observation type: Surface Underway; Sampling instrument: water collection with pump; Detailed sampling and analyzing information: SST is measured with a water temperature transmitter (Pt100) manufactured by Nippon Electric Instrument, Inc. Temperature sensor is calibrated regularly and is confirmed that the sensor is stable to measure temperature with accuracy of 0.15 deg C.; Uncertainty: ± 0.1 °C
  • Parameter or Variable: Sea Surface Salinity; Abbreviation: SSS; Observation type: Surface Underway; Sampling instrument: water collection with pump; Detailed sampling and analyzing information: Salinity are measured with a JFE-Advantec sensor (ACTW-CAD).; Uncertainty: 0.02
  • Parameter or Variable: Sea level pressure; Abbreviation: SLP; Unit: hPa; Observation type: Underway; Analyzing instrument: Nippon Electric Instrument MM-30W; Detailed sampling and analyzing information: Sea level pressure was measured using a pressure sensor with an accuracy of 0.3hPa. The sensor is installed at approximately 12m height.; Uncertainty: 0.3 hPa; QC steps: Yes
Acquisition Information (collection)
Instrument
  • barometric pressure sensor
  • bubble type equilibrator for autonomous carbon dioxide (CO2) measurement
  • carbon dioxide (CO2) gas analyzer
  • salinometer
  • temperature sensor
Platform
  • Oshoro Maru
Last Modified: 2025-12-11T12:47:19Z
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