Dataset Overview | National Centers for Environmental Information (NCEI)

Mapped Observation-Based Oceanic Dissolved Inorganic Carbon (DIC), monthly climatology from January to December (based on observations between 2004 and 2017), from the Max-Planck-Institute for Meteorology (MOBO-DIC_MPIM) (NCEI Accession 0221526)

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This NCEI accession contains mapped observation-based oceanic dissolved inorganic carbon (DIC), monthly climatology from January to December (based on observations between 2004 and 2017), from the Max-Planck-Institute for Meteorology (MOBO-DIC_MPIM). The SOM-FFN approach by Landschützer et al. (2013) was extended and applied to obtain time-varying gap-filled mapped fields of dissolved inorganic carbon (DIC) in the water column. In the SOM-FFN approach, the first step is to cluster the ocean into regions of similar physical and biogeochemical properties using self-organizing maps (SOM). In the second step, a feed-forward network (FFN) is run in each SOM-cluster to approximate and apply the statistical relationship between the target data (here: DIC), and better constrained predictor data that are available as mapped global fields. The SOM-FFN method was adjusted and in several ways compared to the original method by Landschützer et al. (2013), that mapped oceanic surface pCO2. As we map the DIC in the water column, we extended the mapping grid from three dimensions (latitude, longitude, and time), to four (latitude, longitude, time, and depth), and instead of monthly inter-annual fields, we resolved a monthly climatology based on the period from 2004 through 2017. As different predictors are available and/or meaningful when mapping DIC in the water column, we also have a different set of predictor data compared to the approach used by Landschützer et al. (2013). To overcome potential biases in the random selection of training and internal validation data, a bootstrapping approach was used, running the SOM-FFN method ten times. The mean across this ensemble was taken as the final DIC field. We defined the standard deviation across the ensemble as the uncertainty within the method, and name it ensemble spread.
  • Cite as: Keppler, Lydia; Landschützer, Peter; Gruber, Nicolas; Lauvset, Siv K.; Stemmler, Irene (2020). Mapped Observation-Based Oceanic Dissolved Inorganic Carbon (DIC), monthly climatology from January to December (based on observations between 2004 and 2017), from the Max-Planck-Institute for Meteorology (MOBO-DIC_MPIM) (NCEI Accession 0221526). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/yvzj-zx46. Accessed [date].
gov.noaa.nodc:0221526
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Distributor NOAA National Centers for Environmental Information
NCEI.Info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Time Period 2004-01-01 to 2017-12-01
Spatial Bounding Box Coordinates
N: 64.5
S: -64.5
E: 179.5
W: -179.5
Spatial Coverage Map
General Documentation
Associated Resources
  • Keppler, L., Landschützer, P., Gruber, N., Lauvset, S. K., and Stemmler, I. (2020). Seasonal carbon dynamics in the near‐global ocean. Global Biogeochemical Cycles, 34, e2020GB006571. https://doi.org/10.1029/2020GB006571
Publication Dates
  • publication: 2020-11-06
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: Keppler, Lydia; Landschützer, Peter; Gruber, Nicolas; Lauvset, Siv K.; Stemmler, Irene (2020). Mapped Observation-Based Oceanic Dissolved Inorganic Carbon (DIC), monthly climatology from January to December (based on observations between 2004 and 2017), from the Max-Planck-Institute for Meteorology (MOBO-DIC_MPIM) (NCEI Accession 0221526). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/yvzj-zx46. Accessed [date].
Cited Authors
Principal Investigators
Contributors
Resource Providers
Publishers
Acknowledgments
  • Funding Information: European Community (The research leading to these results has received funding from the European Community’s Horizon 2020 Project under grant agreement no. 821003 (4C), 821003 (4C))
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
Provider Variable Names
  • DIC
  • DIC_err
  • depth
  • lat
  • lon
  • month
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS
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
  • Arctic Ocean
  • Atlantic Ocean
  • Indian Ocean
  • Pacific Ocean
  • Southern Ocean
Project keywords NODC PROJECT NAMES THESAURUS Cruise ID
  • Various
EXPOCODE
  • Various
Ocean Acidification Search Keywords
  • Ocean Acidification Data Stewardship (OADS) Project
  • Ocean Carbon Data System (OCADS) Project
  • Ocean Carbon and Acidification Data System (OCADS) Project
Reference Section ID
  • Various
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Keppler, Lydia; Landschützer, Peter; Gruber, Nicolas; Lauvset, Siv K.; Stemmler, Irene (2020). Mapped Observation-Based Oceanic Dissolved Inorganic Carbon (DIC), monthly climatology from January to December (based on observations between 2004 and 2017), from the Max-Planck-Institute for Meteorology (MOBO-DIC_MPIM) (NCEI Accession 0221526). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/yvzj-zx46. 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
  • 2020-11-06T20:39:09Z - NCEI Accession 0221526 v1.1 was published.
Output Datasets
Lineage information for: dataset
Processing Steps
  • Parameter or Variable: Dissolved inorganic carbon (DIC in µmol kg-1, on the grid: lon, lat, depth, month); Abbreviation: DIC; Unit: µmol kg-1.
  • Parameter or Variable: Ensemble spread (DIC_err in µmol kg-1, on the grid: lon, lat, depth, month); Abbreviation: DIC_err; Unit: µmol kg-1.
  • Parameter or Variable: Longitude (lon; 179.5°W to 179.5°E, at 1° resolution); Abbreviation: lon; Unit: degrees_east.
  • Parameter or Variable: Latitude (lat; 64.5°N to 64.5°S, at 1° resolution); Abbreviation: lat; Unit: degrees_north.
  • Parameter or Variable: Depth (depth; from 2.5 m to 1975 m, on 33 depth levels); Abbreviation: depth; Unit: meters.
  • Parameter or Variable: Month of the year (month; 1 to 12); Abbreviation: month; Unit: µmol/kg .
Acquisition Information (collection)
Instrument
  • Carbon dioxide (CO2) gas analyzer
Platform
  • VARIOUS CHARTERED VESSELS
Last Modified: 2021-09-20T06:35:01Z
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