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Dataset Overview | National Centers for Environmental Information (NCEI)

Monthly gridded sea surface fugacity of carbon dioxide (fCO2), total alkalinity (TA), dissolved inorganic carbon (DIC), pH, and aragonite (Ωarag) in Mid-Atlantic Bight and South Atlantic Bight from 1982 to 2015 (NCEI Accession 0208346)

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This dataset contains monthly interpolated sea surface fugacity of carbon dioxide (fCO2) from 1982 through 2015 is estimated from monthly atmospheric CO2, temperature, and salinity. Firstly, the disequilibrium between the observed seawater fCO2 and fCO2air (i.e., ΔfCO2; ΔfCO2 = fCO2 – fCO2air) is estimated using a bayesian-neural-network approach for each 1°×1° grid box in the MAB and the SAB. The input parameters are latitude, longitude, SST, and SSS. The output parameter is ΔfCO2. The feedforward backpropagation network is constructed by two hidden layers with tanh activation functions. The neural network is trained with the Levenberg-Marquardt algorithm (Hagan and Menhaj, 1994). Then fCO2 is calculated using ΔfCO2 and fCO2air. Next, continuous monthly SST and SSS data from 1982 to 2015 are used to calculate output with the trained network to fill in SOCAT data gaps. Monthly pH, DIC, and Ωarag are calculated from fCO2 and salinity-derived TA using CO2SYS (Van Heuven et al., 2009) with the first and second dissociation constants of carbonic acid in seawater (K1 and K2) from Lueker et al. (2000) and borate-to-salinity ratio determined by Uppström (1974). TA is derived from salinity using their linear relationships in the MAB and the SAB (Cai et al., 2010).
  • Cite as: Xu, Yuan-Yuan; Cai, Wei-Jun; Wanninkhof, Rik; Salisbury, Joseph E. (2020). Monthly gridded sea surface fugacity of carbon dioxide (fCO2), total alkalinity (TA), dissolved inorganic carbon (DIC), pH, and aragonite (Ωarag) in Mid-Atlantic Bight and South Atlantic Bight from 1982 to 2015 (NCEI Accession 0208346). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/bzne-9615. Accessed [date].
gov.noaa.nodc:0208346
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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 1982-01-01 to 2015-12-31
Spatial Bounding Box Coordinates
West: -81
East: -70
South: 28
North: 50
Spatial Coverage Map
General Documentation
Associated Resources
  • Xu, Y.-Y, Cai, W.-J., Wanninkhof, R., Salisbury, J., Reimer, J., and Chen, B. (2019). Long-term changes of carbonate chemistry variables along the North American east coast. Journal of Geophysical Research: Oceans. In Review.
  • Cai, W. J. et al. (2010). Alkalinity distribution in the western North Atlantic Ocean margins. Journal of Geophysical Research-Oceans, 115.
  • Hagan, M. T. and Menhaj, M. (1994). Training feedforward networks with the Marquardt algorithm. IEEE Transactions on Neural Network, 5(6), 989-993, https://doi.org/10.1109/72.329697.
  • Lueker, T. J., Dickson, A. G. and Keeling, C. D. (2000). Ocean pCO2 calculated from dissolved inorganic carbon, alkalinity, and equations for K1 and K2: validation based on laboratory measurements of CO2 in gas and seawater at equilibrium. Marine Chemistry, 70(1-3), 105-119, https://doi.org/10.1016/S0304-4203(00)00022-0.
  • Uppström, L. R. (1974). The boron/chlorinity ratio of deep-sea water from the Pacific Ocean. Deep Sea Research and Oceanographic Abstracts, 21(2), 161-162, https://doi.org/10.1016/0011-7471(74)90074-6.
  • Van Heuven, S., Pierrot, D., Rae, J. W. B. and Wallace, D. W. R., 2009. MATLAB program developed for CO2 system calculations, Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee.
  • Monthly gridded sea surface fugacity of carbon dioxide (fCO2), total alkalinity (TA), dissolved inorganic carbon (DIC), pH, and aragonite (Ωarag) in Mid-Atlantic Bight and South Atlantic Bight from 1982 to 2015
  • 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
Publication Dates
  • publication: 2020-01-17
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 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: Xu, Yuan-Yuan; Cai, Wei-Jun; Wanninkhof, Rik; Salisbury, Joseph E. (2020). Monthly gridded sea surface fugacity of carbon dioxide (fCO2), total alkalinity (TA), dissolved inorganic carbon (DIC), pH, and aragonite (Ωarag) in Mid-Atlantic Bight and South Atlantic Bight from 1982 to 2015 (NCEI Accession 0208346). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/bzne-9615. Accessed [date].
Cited Authors
Principal Investigators
Contributors
Resource Providers
Publishers
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
Global Change Master Directory (GCMD) Science Keywords OCADS Study Type
  • Data synthesis product
  • Discrete measurement
  • Profile
Provider Variable Abbreviations
  • alkalinity (lon, lat, time)
  • aragonite (lon, lat, time)
  • dic (lon, lat, time)
  • fco2sw (lon, lat, time)
  • lat
  • lon
  • ph (lon, lat, time)
  • sss (lon, lat, time)
  • sst (lon, lat, time)
  • time
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
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
  • Atlantic Ocean
  • Mid-Atlantic Bight
  • South Atlantic Bight
Project keywords NODC PROJECT NAMES THESAURUS Cruise ID
  • Various
EXPOCODE
  • Various
Ocean Acidification Search Keywords
  • Ocean Carbon and Acidification Data System (OCADS) Project
Reference Section ID
  • Various
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Xu, Yuan-Yuan; Cai, Wei-Jun; Wanninkhof, Rik; Salisbury, Joseph E. (2020). Monthly gridded sea surface fugacity of carbon dioxide (fCO2), total alkalinity (TA), dissolved inorganic carbon (DIC), pH, and aragonite (Ωarag) in Mid-Atlantic Bight and South Atlantic Bight from 1982 to 2015 (NCEI Accession 0208346). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/bzne-9615. 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
  • 2020-01-17T21:36:42Z - NCEI Accession 0208346 v1.1 was published.
Output Datasets
Lineage information for: dataset
Processing Steps
  • Parameter or Variable: longitude in degrees east (70.5°W - 80.5°W with 1° resolution); Abbreviation: lon; Unit: degrees_east.
  • Parameter or Variable: Latitude in degrees north (28.5°N - 40.5°N with 1° resolution); Abbreviation: lat; Unit: degrees_north.
  • Parameter or Variable: Time in seconds since 2000-01-01-00:00:00 (monthly resolution); Abbreviation: time; Unit: seconds.
  • Parameter or Variable: Sea surface temperature, OISST version 2 data obtained from NOAA’s ESRL Physical Science Division at https://www.esrl.noaa.gov/psd/data/gridded/data.noaa.oisst.v2.html.; Abbreviation: sst (lon, lat, time).
  • Parameter or Variable: Sea surface salinity, EN4 temperature and salinity data were obtained from Met Office Hadley Center at https://www.metoffice.gov.uk/hadobs/en4/download-en4-2-1.html.; Abbreviation: sss (lon, lat, time).
  • Parameter or Variable: Sea water fugacity of carbon dioxide; Abbreviation: fco2sw (lon, lat, time); Unit: µatm.
  • Parameter or Variable: Total alkalinity; Abbreviation: alkalinity (lon, lat, time); Unit: µmol/kg.
  • Parameter or Variable: In situ pH on total scale; Abbreviation: ph (lon, lat, time).
  • Parameter or Variable: Dissolved inorganic carbon; Abbreviation: dic (lon, lat, time); Unit: µmol/kg.
  • Parameter or Variable: Seawater aragonite saturation state; Abbreviation: aragonite (lon, lat, time) .
Acquisition Information (collection)
Instrument
  • carbon dioxide (CO2) gas analyzer
  • showerhead equilibrator
Platform
  • VARIOUS CHARTERED VESSELS
Last Modified: 2024-03-08T13:25:10Z
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