USAP-DC

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{"@context": "https://schema.org/", "@type": "Dataset", "@id": "https://www.usap-dc.org/view/dataset/602044", "additionalType": ["geolink:Dataset", "vivo:Dataset"], "name": "40Ar-atm and \u03b418O data for Allan Hills ice cores ALHIC 2301, ALHIC 2302, ALHIC 2201", "description": "Dataset that includes 40 Ar atm and \u03b418O data from Allan Hills ice cores ALHIC2301, ALHIC2302, and ALHIC2201. 40Ar atm dating method is based on the deficit of radiogenic 40 Ar in ancient ice sample compared to the modern atmosphere as a standard (Bender et al., 2008). The argon isotope ratios (\u03b440Ar/36Ar, \u03b440Ar/38Ar and \u03b438Ar/36Ar ) were analysed using the MAT253plus with Dual Inlet systems. The \u03b440Ar/38Ar was corrected from gravitational settling or fractionation occuring in the firn using \u03b438Ar/36Ar to get the 40Ar atm. The amount of 40Ar atm divided by the degassing rate of radiogenic 40Ar into atmosphere gives the Argon age of the sample. The \u03b440Ar/38Ar was corrected from gravitational settling /fractionation occuring in the firn using \u03b438Ar/36Ar to get the 40Ar atm. The amount of 40Ar atm divided by the degassing rate of radiogenic 40Ar into atmosphere gives the Argon age of the sample. All \u03b418\u039f data were analyzed using either a Picarro L2130-i or a L2140-i cavity-ring-down laser spectrometer, calibrated to the VSMOW-SLAP scale using references waters previously calibration to the VSMOW and SLAP international standards. Precision and accuracy (one standard deviation), based on independent analysis of a quality-control reference water, is <0.1\u2030.", "citation": "Higgins, J., Epifanio, J., Hishamunda, V., Kirkpatrick, L., & Steig, E. J. (2026) \"40Ar-atm and \u03b418O data for Allan Hills ice cores ALHIC 2301, ALHIC 2302, ALHIC 2201\" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/None.", "datePublished": "2026-04-02", "keywords": ["Allan Hills", "Allan Hills", "Allan Hills Blue Ice", "Antarctica", "Argon-Argon Dates", "Cryosphere", "Water Isotopes"], "creator": [{"@type": "Person", "additionalType": "geolink:Person", "name": "Epifanio, Jenna", "email": "jenna.epifanio@oregonstate.edu", "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Higgins, John", "email": "jahiggin@princeton.edu", "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Hishamunda, Valens", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Kirkpatrick, Liam", "email": "liamkp@uw.edu", "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Steig, Eric J.", "email": "steig@uw.edu", "affiliation": {"@type": "Organization", "name": "University of Washington, Department of Earth and Space Sciences, Box 35130, 70 Johnson Hall"}}], "distribution": [{"@type": "DataDownload", "additionalType": "http://www.w3.org/ns/dcat#DataCatalog", "encodingFormat": "text/xml", "name": "ISO Metadata Document", "url": "https://www.usap-dc.org/metadata/isoxml/602044iso.xml", "contentUrl": "/dataset/filename"}, {"@type": "DataDownload", "@id": "https://www.usap-dc.org/view/dataset/602044", "additionalType": "dcat:distribution", "url": "https://www.usap-dc.org/view/dataset/602044", "contentUrl": "/dataset/filename", "encodingFormat": "text/html"}, {"@type": "DataDownload", "@id": "https://www.usap-dc.org/view/dataset/602044", "additionalType": "dcat:distribution", "url": "https://www.usap-dc.org/view/dataset/602044", "contentUrl": "/dataset/filename", "encodingFormat": "text/html"}], "identifier": {"@type": "PropertyValue", "url": "https://www.usap-dc.org/view/dataset/602044", "value": "https://www.usap-dc.org/view/dataset/602044"}, "contributor": [{"@type": "Role", "roleName": "credit", "description": "funderName:NSF:GEO:OPP:Antarctic Glaciology awardNumber:2019719 awardTitle:STC: Center for OLDest Ice EXploration"}], "license": [{"@type": "CreativeWork", "URL": "https://creativecommons.org/licenses/by/4.0/", "name": "MD_Constraints", "description": "useLimitation: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0]."}, {"@type": "CreativeWork", "name": "MD_LegalConstraints", "description": "accessConstraints: license. otherConstraints: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0]."}, {"@type": "CreativeWork", "name": "MD_SecurityConstraints", "description": "classification: "}], "publisher": {"@type": "Organization", "name": "U.S. Antarctic Program (USAP) Data Center"}, "spatialCoverage": []}

40Ar-atm and δ18O data for Allan Hills ice cores ALHIC 2301, ALHIC 2302, ALHIC 2201 Cite as Higgins, J., Epifanio, J., Hishamunda, V., Kirkpatrick, L., & Steig, E. J. (2026) "40Ar-atm and δ18O data for Allan Hills ice cores ALHIC 2301, ALHIC 2302, ALHIC 2201" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/None. Abstract Dataset that includes 40 Ar atm and δ18O data from Allan Hills ice cores ALHIC2301, ALHIC2302, and ALHIC2201. 40Ar atm dating method is based on the deficit of radiogenic 40 Ar in ancient ice sample compared to the modern atmosphere as a standard (Bender et al., 2008). The argon isotope ratios (δ40Ar/36Ar, δ40Ar/38Ar and δ38Ar/36Ar ) were analysed using the MAT253plus with Dual Inlet systems. The δ40Ar/38Ar was corrected from gravitational settling or fractionation occuring in the firn using δ38Ar/36Ar to get the 40Ar atm. The amount of 40Ar atm divided by the degassing rate of radiogenic 40Ar into atmosphere gives the Argon age of the sample. The δ40Ar/38Ar was corrected from gravitational settling /fractionation occuring in the firn using δ38Ar/36Ar to get the 40Ar atm. The amount of 40Ar atm divided by the degassing rate of radiogenic 40Ar into atmosphere gives the Argon age of the sample. All δ18Ο data were analyzed using either a Picarro L2130-i or a L2140-i cavity-ring-down laser spectrometer, calibrated to the VSMOW-SLAP scale using references waters previously calibration to the VSMOW and SLAP international standards. Precision and accuracy (one standard deviation), based on independent analysis of a quality-control reference water, is <0.1‰. Creator(s): Higgins, John; Hishamunda, Valens; Kirkpatrick, Liam; Steig, Eric J. Date Created: 2026-04-02 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Award(s) NSF 2019719 Version: 1 Related Project(s) Center for Oldest Ice Exploration Keywords Allan Hills Allan Hills Allan Hills Blue Ice Antarctica Argon-Argon Dates Cryosphere Water Isotopes