{
    "identifier": "ark:\/88434\/mds2-2369",
    "accessLevel": "public",
    "references": [
        "https:\/\/doi.org\/10.1038\/s41567-021-01226-y"
    ],
    "contactPoint": {
        "hasEmail": "mailto:[email protected]",
        "fn": "Adam Fleisher"
    },
    "programCode": [
        "006:045"
    ],
    "@type": "dcat:Dataset",
    "landingPage": "https:\/\/data.nist.gov\/od\/id\/mds2-2369",
    "description": "Data set from peer-reviewed publication:  A. J. Fleisher et al., Absolute 13C\/12C Isotope Amount Ratio for Vienna Pee Dee Belemnite from Infrared Absorption Spectroscopy, Nature Physics. Measurements of isotope ratios are predominantly made with reference to standard specimens that have been characterized in the past. In the 1950s, the carbon isotope ratio was referenced to a belemnite sample collected by Heinz Lowenstam and Harold Urey in South Carolina?s Pee Dee region. Due to the exhaustion of the sample since then, reference materials that are traceable to the origin artefact are used to define the Vienna Pee Dee Belemnite (VPDB) scale for stable carbon isotope analysis. However, these reference materials have also become exhausted or proven unstable over time, mirroring issues with the international prototype of the kilogram that led to a revised International System of Units. A campaign to elucidate the stable carbon isotope ratio of VPDB is underway, but independent measurement techniques are required to support it. Here we report an accurate value for the stable carbon isotope ratio inferred from infrared absorption spectroscopy, fulfilling the promise of this fundamentally accurate approach. Our results agree with a value recently derived from mass spectrometry, and therefore advance the prospects of SI-traceable isotope analysis. Further, our calibration-free method could improve mass balance calculations and enhance isotopic tracer studies in CO2 source apportionment.",
    "language": [
        "en"
    ],
    "title": "Absolute 13C\/12C Isotope Amount Ratio for Vienna Pee Dee Belemnite from Infrared Absorption Spectroscopy",
    "distribution": [
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-2369\/Fleisher_NPHYS_rev2_fig3_A_data.xls",
            "format": "CSV",
            "description": "Scatter plot of all 301 unique AIR-IS measurements of R(13C\/12C)_VPDB, along with error bars showing a relative precision of approximately 0.2E-3. Histogram of values fitted to a normal distribution.",
            "mediaType": "application\/vnd.ms-excel",
            "title": "AIR-IS value of R(13C\/12C)_VPDB."
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-2369\/Fleisher_NPHYS_rev2_fig1_BC_data.xls.sha256",
            "mediaType": "text\/plain",
            "title": "SHA256 File for Accurate isotope ratio infrared spectroscopy (AIR-IS)"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-2369\/Fleisher_NPHYS_rev2_fig1_BC_data.xls",
            "format": "CSV",
            "description": "Representative high-resolution cavity ring-down absorption spectra of 13C16O2 and 12C16O2 for a sample of NIST Standard Reference Material 1720 Northern Continental Air.",
            "mediaType": "application\/vnd.ms-excel",
            "title": "Accurate isotope ratio infrared spectroscopy (AIR-IS)"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-2369\/Fleisher_NPHYS_rev2_fig2_AB_data.xls.sha256",
            "mediaType": "text\/plain",
            "title": "SHA256 File for AIR-IS measurements of R(13C\/12C)_sample versus IRMS assignments of delta-13C."
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-2369\/Fleisher_NPHYS_rev2_fig2_AB_data.xls",
            "format": "CSV",
            "description": "AIR-IS values of R(13C\/12C)_sample were measured for five CO2-in-air samples with delta-13C VPDB value assignments by IRMS.",
            "mediaType": "application\/vnd.ms-excel",
            "title": "AIR-IS measurements of R(13C\/12C)_sample versus IRMS assignments of delta-13C."
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-2369\/Fleisher_NPHYS_rev2_fig2_C_data.xls.sha256",
            "mediaType": "text\/plain",
            "title": "SHA256 File for Representative delta-13C values."
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-2369\/Fleisher_NPHYS_rev2_fig2_C_data.xls",
            "format": "CSV",
            "description": "Expanded ranged of delta-13C values for some terrestrial and marine carbon sources.",
            "mediaType": "application\/vnd.ms-excel",
            "title": "Representative delta-13C values."
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-2369\/Fleisher_NPHYS_rev2_fig3_A_data.xls.sha256",
            "mediaType": "text\/plain",
            "title": "SHA256 File for AIR-IS value of R(13C\/12C)_VPDB."
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-2369\/Fleisher_NPHYS_rev2_fig3_C_data.xls.sha256",
            "mediaType": "text\/plain",
            "title": "SHA256 File for Literature values of R(13C\/12C)_VPDB."
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-2369\/Fleisher_NPHYS_rev2_fig3_C_data.xls",
            "format": "CSV",
            "description": "Comparison of literature values of R(13C\/12C)_VPDB, including this work. Error bars show the combined standard uncertainty.",
            "mediaType": "application\/vnd.ms-excel",
            "title": "Literature values of R(13C\/12C)_VPDB."
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-2369\/readme.txt.sha256",
            "mediaType": "text\/plain",
            "title": "SHA256 File for README"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-2369\/readme.txt",
            "format": "TXT",
            "description": "Information regarding this data set.",
            "mediaType": "text\/plain",
            "title": "README"
        },
        {
            "accessURL": "https:\/\/doi.org\/10.18434\/mds2-2369",
            "title": "DOI Access for Absolute 13C\/12C Isotope Amount Ratio for Vienna Pee Dee Belemnite from Infrared Absorption Spectroscopy"
        }
    ],
    "license": "https:\/\/www.nist.gov\/open\/license",
    "bureauCode": [
        "006:55"
    ],
    "modified": "2021-02-17 00:00:00",
    "publisher": {
        "@type": "org:Organization",
        "name": "National Institute of Standards and Technology"
    },
    "accrualPeriodicity": "irregular",
    "theme": [
        "Environment:Greenhouse gas measurements",
        "Environment:Air \/ water \/ soil quality",
        "Chemistry:Analytical chemistry",
        "Physics:Spectroscopy",
        "Metrology:Amount of substance"
    ],
    "issued": "2021-04-09",
    "keyword": [
        "greenhouse gases",
        "carbon dioxide",
        "oceans",
        "ph",
        "marine mammals",
        "remote sensing",
        "seabirds",
        "Environment and Climate"
    ]
}