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    "@id": "https://antcat.antarcticanz.govt.nz/geonetwork/srv/api/records/d150c898-a43a-4c5c-b9c0-e55b2e038403",
    "includedInDataCatalog":[{"@type":"DataCatalog","url":"https://antcat.antarcticanz.govt.nz/geonetwork/srv/search#","name":""}],
    
    "inLanguage":"eng",
    
    "name": "Line-of-Sight Velocities of Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry",

    
    "alternateName": [
    ],
    "dateCreated": [
    
      "2021-09-13T09:27:00"],
    "dateModified": [
    ],
    "datePublished": [
    
      "2021-09-13T09:27:00"],
    "thumbnailUrl": [
    
      "https://antcat.antarcticanz.govt.nz:/geonetwork/srv/api/records/d150c898-a43a-4c5c-b9c0-e55b2e038403/attachments/d5409f49-303f-4b69-b679-9455f3ed07a9.png"],
    "description": "These data were aquired with a Terrestrial Radar Interferometer overlooking the grounding zone of Priestley Glacier, Antarctica. The time series contains differential interferograms with a 12h temporal baseline covering an approximately 8 day period in November 2018.\n\nTidal modulation of ice streams and their adjacent ice shelves is a real-world experiment to understand ice-dynamic processes. We observe the dynamics of Priestley Glacier, Antarctica, using Terrestrial Radar Interferometry (TRI) and GNSS. Ocean tides are predominantly diurnal but horizontal GNSS displacements oscillate also semi-diurnally. The oscillations are strongest in the ice shelf and tidal signatures decay near-linearly in the TRI data over >10 km upstream of the grounding line. Tidal flexing is observed >6 km upstream of the grounding line including cm-scale uplift. Tidal grounding line migration is small and <40 % of the ice thickness. The frequency doubling of horizontal displacements relative to the ocean tides is consistent with variable ice-shelf buttressing demonstrated with a visco-elastic Maxwell model. Taken together, this supports previously hypothesized flexural ice softening in the grounding-zone through tides and offers new observational constraints for the role of ice rheology in ice-shelf buttressing.\n\nTime series of line-of-sight flowfields averaged over approximately three hours.\nData were taken with a Terrestrial Radar Interferometer in November 2018 at the grounding zone of Priestley Glacier, Antarctica\n\u2013 The Zip Archive contains 288 Geotiff in South polar stereographic projection\n\u2013 Each raster has 4027 x 4746 entries\n\u2013 The file name details the approximately 3h time inverval of aquisition with Stack_YYYYMMDD_HHMMSS_YYYYMMDD_HHMMSS marking the beginning and end of the time interval, respectively.\n\u2013 The line of sight velocities are given in meters per year\n\nRelated Publication:\nDrews, R., Wild, C. T., Marsh, O. J., Rack, W., Ehlers, T. A., Neckel, N., & Helm, V. (2021). Grounding-zone flow variability of Priestley Glacier, Antarctica, in a diurnal tidal regime. Geophysical Research Letters, 48, e2021GL093853. https:\/\/doi.org\/10.1029\/2021GL093853\n\nGET DATA:\nhttps:\/\/doi.org\/10.1594\/PANGAEA.935702",

    
    
    
      "identifier": "https://doi.org/10.1594/PANGAEA.935702",
    


    
    "keywords":[
    "PRIESTLEY GLACIER","INSTALLATION","K050A","OCEANS","GLACIERS","TIDES","GLACIER MOTION\/ICE SHEET MOTION","Global Positioning System (GPS)","GNSS","Interferometers","GPS","Radar","ANTARCTICA"
    ]


    
    ,"creator": [

          {
          
          
          "@type":"Person"
          
            ,"name": "Drews, Reinhard."
            ,"email":  ["reinhard.drews@uni-tuebingen.de"]
          

          
          ,"contactPoint": {
          "@type" : "PostalAddress"
          
          }
          }

          ]
        ,"publisher": [

          {
          

          
          "@type":"Organization"
          
            ,"name": "PANGAEA"
            ,"email":  ["info@pangaea.de"]
          

          
          ,"contactPoint": {
          "@type" : "PostalAddress"
          
          }
          }


          ]

        

    
    
    ,"distribution": [
    
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      "@type":"DataDownload",
      "contentUrl": "https:\/\/doi.org\/10.1594\/PANGAEA.935702",
      "encodingFormat": "WWW:LINK-1.0-http--link",
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    ,"spatialCoverage": [
    
      {"@type":"Place",
      "description": [
      
      ],
      "geo": [
      
        {"@type":"GeoShape",
        "box": "-74.4089 163.4665 -74.391 163.5334"
        }
      ]
      }]

    ,"temporalCoverage": [
    
      "2018-11-01T00:00:00/2018-11-01T12:00:00"
      ]


    
      ,"license": [
          {
          "@type": "CreativeWork",
          "name": "This data set conforms to the CC BY Attribution License (https:\/\/creativecommons.org\/licenses\/by\/4.0\/)"
          }
        ]
    
    
    
    

    , "citation": "Drews, Reinhard., Wild, Christian T., Marsh, Oliver., Rack, Wolfgang., Ehlers, Todd A., Neckel, Niklas., Helm, Veit.,  (
    2021
    ) Line-of-Sight Velocities of Priestley Glacier, Antarctica, aquired with Terrestrial Radar Interferometry.
    PANGAEA.
        https://doi.org/10.1594/PANGAEA.935702,
    Accessed: 2026-07-07+12:00"

    }