Concentrations, d13C and D14C data for DOC and DIC in fluids collected from North Pond Cork Observatories U1382A and U1383C and from bottom seawater in 2012, 2014 and 2017 (NCEI Accession 0278518)
This dataset contains chemical data collected on R/V Atlantis during cruise AT39-01 in the North Atlantic Ocean from 2017-10-11 to 2017-10-15. These data include d13C, dissolved inorganic Carbon, and dissolved organic Carbon. The instruments used to collect these data include Apollo SciTech AS-C3 Dissolved Inorganic Carbon (DIC) analyzer and LI-COR LI-6262 Gas Analyzer. These data were collected by Peter Girguis of Harvard University and Sunita R. Shah Walter of University of Delaware as part of the "Collaborative Research: A multidimensional approach to understanding microbial carbon cycling beneath the seafloor during cool hydrothermal circulation (Subseafloor Microbial Carbon Cycling)" project and "Center for Dark Energy Biosphere Investigations (C-DEBI)" program. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2022-08-10.
The following is the text of the dataset description provided by BCO-DMO:
Concentrations, d13C and D14C data for DOC and DIC
Dataset Description:
These data were published in (include table #) :
2012-2014 DIC, DOC, and isotopic DIC parameters are in Table 1, Shah Walter et al., 2018. (Only DOC values originally reported by NOSAMS are included in Table 1, corrected values were not available at the time of publication).
2017 DIC concentrations are in Table 1 of Trembath-Reichert et al. 2021.
The following is the text of the dataset description provided by BCO-DMO:
Concentrations, d13C and D14C data for DOC and DIC
Dataset Description:
These data were published in (include table #) :
2012-2014 DIC, DOC, and isotopic DIC parameters are in Table 1, Shah Walter et al., 2018. (Only DOC values originally reported by NOSAMS are included in Table 1, corrected values were not available at the time of publication).
2017 DIC concentrations are in Table 1 of Trembath-Reichert et al. 2021.
Dataset Citation
- Cite as: Girguis, Peter; Shah Walter, Sunita R. (2023). Concentrations, d13C and D14C data for DOC and DIC in fluids collected from North Pond Cork Observatories U1382A and U1383C and from bottom seawater in 2012, 2014 and 2017 (NCEI Accession 0278518). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0278518. Accessed [date].
Dataset Identifiers
ISO 19115-2 Metadata
gov.noaa.nodc:0278518
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NOAA National Centers for Environmental Information +1-301-713-3277 NCEI.Info@noaa.gov |
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NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Time Period | 2017-10-11 to 2017-10-15 |
Spatial Bounding Box Coordinates |
West: -46.082
East: -46.053
South: 22.756
North: 22.813
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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 | Acquisition Description: Samples were taken during cruise R/V Atlantis AT39-01. ROV Jason II dives 1024 – 1035, IODP CORK observatories U1382A, U1383C Detailed methodology for sample collection, shipboard procedures and sample storage conditions provided in BCO-DMO dataset “Carbon Geochemistry Samples List” (see related datasets) Procedures for measurement of concentrations, d13C and D14C values of DIC and DOC from fluid samples are described in Shah Walter, S. R et al. (2018) . Briefly, DIC samples were transferred from sampling bags through Masterflex Bio-Pharm silicone tubing pre-cleaned with 10% HCl to 100 mL Wheaton wide-mouth reagent bottles with ground-glass stoppers such that turbulence during fluid transfer was minimized. Samples were preserved according to NOSAMS DIC sampling protocol: http://www.whoi.edu/fileserver.do?id=75006&pt=2&p=75096 and stored at room temperature in the dark. DIC samples were submitted to the NOSAMS AMS facility for analysis (https://www2.whoi.edu/site/nosams/). DIC concentration is measured as CO2 yield after acidification and water stripping for fluids sampled in 2012 and 2014 and reported with an uncertainty of 5%. For fluids sampled in 2017, DIC was measured on an AS-C3 analyzer (Apollo Scitech, Newark, DE, USA). After acidification with phosphoric acid, the evolved CO2 was extracted and carried by pure N2 gas to an infrared CO2 detector (Li-Cor 6262). DIC concentrations were calibrated against certified reference material produced by A. G. Dickson (Scripps Institution of Oceanography, San Diego, CA, USA). Each sample was measured in duplicate with repeat concentrations within 0.1% and measurement uncertainty of 2 umol/kg. d13C values are measured on CO2 splits by IRMS and reported with a conservative uncertainty of 0.1‰, higher than each individual measurement. D14C values are measured by AMS and uncertainty is reported for each individual measurement. All isotopic measurements and error estimations were made according to standard NOSAMS protocols. DOC samples were transferred to 1000-mL amber glass bottles. A parallel set of samples was filtered through pre-combusted GF/F filters to remove particulate matter but these samples yielded more carbon than observed in previous years and it was determined that they were likely to be contaminated. Values reported are from whole, unfiltered fluids which yielded less CO2 than filtered fluids supporting our hypothesis that filtered samples were contaminated. Particles were not observed in the whole fluids during transfer. Frozen DOC samples were submitted to the NOSAMS AMS facility for analysis (https://www2.whoi.edu/site/nosams/). DOC concentrations are measured as CO2 yield after UV-oxidation of samples. d13C values are measured on CO2 splits by IRMS and original values reported with a conservative uncertainty of 0.5‰, higher than each individual measurement. D14C values are measured by AMS and uncertainty is reported for each individual measurement. All measurements and error estimations were made according to standard NOSAMS protocols. NOSAMS revised all previously reported DOC data in 2019 according to new internal estimation and correction for carbon blank in their DOC oxidation procedure. Original and corrected DOC data are both reported in the dataset for samples measured before 2019. For corrected d13C values, individual error estimates are reported as well. |
Purpose | This dataset is available to the public for a wide variety of uses including scientific research and analysis. |
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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 BCO-DMO Platform Names Global Change Master Directory (GCMD) Platform Keywords ICES/SeaDataNet Ship Codes |
Instrument keywords | NODC INSTRUMENT TYPES THESAURUS BCO-DMO Standard Instruments Global Change Master Directory (GCMD) Instrument Keywords Originator Instrument Names |
Place keywords | NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords Provider Place Names |
Project keywords | BCO-DMO Standard Programs BCO-DMO Standard Projects Provider Cruise IDs Provider Funding Award Information |
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Last Modified: 2024-05-31T18:50:46Z
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For questions about the information on this page, please email: ncei.info@noaa.gov