USAP-DC

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{"@context": "https://schema.org/", "@type": "Dataset", "@id": "doi:10.15784/601057", "additionalType": ["geolink:Dataset", "vivo:Dataset"], "name": "c-Axis Fabric of the South Pole Ice Core, SPC14", "description": "Thin sections of the South Pole Ice Core, SPC14, were prepared from samples taken every ~20 meters starting at 100 meters depth. Samples from 140 meters to 1739 meters depth were analyzed to determine the c-axis fabric of the grains. The ice is generally fine-grained, with the samples at 100 and 120 meters depth too fine grained for successful analysis, but sufficient grain growth having occurred for analysis of all deeper samples.\r\r\nThe c-axis fabric was measured on the automated c-axis fabric analyzer located at Penn State University, designed and built by Larry Wilen. Raw data is in the form of multiple images of the ice thin section taken at defined angles under cross polarized light. The images are analyzed to determine position of the extinction minimum of each grain within the thin section, this being the orientation of the c-axis of that grain. During processing, the area of each analyzed grain is also measured.\r\r\nShallow samples show a fairly random distribution, although with a slight tendency for clustering of c-axes toward the vertical. With increasing depth, the c-axes rotate toward a vertical plane with a slight additional tendency of clustering toward the vertical within that plane. The core was not oriented during collection, so it is not possible to unambiguously tell how the vertical plane is related to ice flow, but physical understanding indicates that it is transverse to flow.", "citation": "Voigt, D. E. (2017) \"c-Axis Fabric of the South Pole Ice Core, SPC14\" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601057.", "datePublished": "2017-09-20", "keywords": ["Antarctica", "Glaciers/ice Sheet", "Glaciology", "South Pole", "SPICEcore"], "creator": [{"@type": "Person", "additionalType": "geolink:Person", "name": "Voigt, Donald E.", "email": "dev2@psu.edu", "affiliation": {"@type": "Organization", "name": ""}}], "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/601057iso.xml", "contentUrl": "/dataset/filename"}, {"@type": "DataDownload", "@id": "http://dx.doi.org/10.15784/601057", "additionalType": "dcat:distribution", "url": "http://dx.doi.org/10.15784/601057", "contentUrl": "/dataset/filename", "encodingFormat": "text/html"}, {"@type": "DataDownload", "@id": "https://www.usap-dc.org/view/dataset/601057", "additionalType": "dcat:distribution", "url": "https://www.usap-dc.org/view/dataset/601057", "contentUrl": "/dataset/filename", "encodingFormat": "text/html"}], "identifier": {"@type": "PropertyValue", "propertyID": "https://registry.identifiers.org/registry/doi", "value": "doi:10.15784/601057", "url": "https://doi.org/10.15784/601057"}, "contributor": [{"@type": "Role", "roleName": "credit", "description": "funderName:NSF:GEO:OPP:Antarctic Glaciology awardNumber:1542778 awardTitle:Climate History and Flow Processes from Physical Analyses of the SPICECORE South Pole Ice Core"}], "license": [{"@type": "CreativeWork", "URL": "https://creativecommons.org/licenses/by-nc/4.0/", "name": "MD_Constraints", "description": "useLimitation: Creative Commons Attribution-NonCommercial v4.0 Generic [CC BY-NC 4.0]."}, {"@type": "CreativeWork", "name": "MD_LegalConstraints", "description": "accessConstraints: license. otherConstraints: Creative Commons Attribution-NonCommercial v4.0 Generic [CC BY-NC 4.0]."}, {"@type": "CreativeWork", "name": "MD_SecurityConstraints", "description": "classification: "}], "publisher": {"@type": "Organization", "name": "U.S. Antarctic Program (USAP) Data Center"}, "spatialCoverage": [{"@type": "Place", "geo": {"@type": "GeoShape", "box": "-90 -180 -90 -180"}}]}

c-Axis Fabric of the South Pole Ice Core, SPC14 Data DOI: https://doi.org/10.15784/601057 Cite as Voigt, D. E. (2017) "c-Axis Fabric of the South Pole Ice Core, SPC14" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601057. AMD - DIF Record(s) USAP-1542778 Abstract Thin sections of the South Pole Ice Core, SPC14, were prepared from samples taken every ~20 meters starting at 100 meters depth. Samples from 140 meters to 1739 meters depth were analyzed to determine the c-axis fabric of the grains. The ice is generally fine-grained, with the samples at 100 and 120 meters depth too fine grained for successful analysis, but sufficient grain growth having occurred for analysis of all deeper samples. The c-axis fabric was measured on the automated c-axis fabric analyzer located at Penn State University, designed and built by Larry Wilen. Raw data is in the form of multiple images of the ice thin section taken at defined angles under cross polarized light. The images are analyzed to determine position of the extinction minimum of each grain within the thin section, this being the orientation of the c-axis of that grain. During processing, the area of each analyzed grain is also measured. Shallow samples show a fairly random distribution, although with a slight tendency for clustering of c-axes toward the vertical. With increasing depth, the c-axes rotate toward a vertical plane with a slight additional tendency of clustering toward the vertical within that plane. The core was not oriented during collection, so it is not possible to unambiguously tell how the vertical plane is related to ice flow, but physical understanding indicates that it is transverse to flow. Creator(s): Voigt, Donald E. Date Created: 2017-09-20 Repository: USAP-DC (current) License: Creative Commons Attribution-NonCommercial v4.0 Generic [CC BY-NC 4.0] Spatial Extent(s) West: -180, East: -180, South: -90, North: -90 Temporal Extent(s) Start: 2015-12-05 - End: 2016-01-23 Award(s) NSF 1542778 Version: 1 Related Project(s) Climate History and Flow Processes from Physical Analyses of the SPICECORE South Pole Ice Core Keywords Antarctica Glaciers/ice Sheet Glaciology South Pole SPICEcore