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  • ALTITUDE; File format; File name; File size; Kangerlussuaq-Sector; LATITUDE; LONGITUDE; Pitch angle; Roll angle; UAV; Uniform resource locator/link to file; Unmanned aerial vehicle; Yaw angle  (1)
  • Geosciences (General)  (1)
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  • 1
    facet.materialart.
    Unknown
    UAV imagery over K-sector of the Greenland Ice Sheet on 8 August 2014 (2018)
    PANGAEA
    In:  Brown University, Rhode Island | Supplement to: Ryan, Jonathan C; Hubbard, Alun L; Stibal, Marek; Irvine-Fynn, Tristram D L; Cook, Joseph; Smith, Laurence C; Cameron, Karen; Box, Jason E (2018): Dark zone of the Greenland Ice Sheet controlled by distributed biologically-active impurities. Nature Communications, 9(1), https://doi.org/10.1038/s41467-018-03353-2
    Details
    Publication Date: 2023-09-30
    Description: Digital imagery acquired by a Sony NEX-5N digital camera vertically mounted inside a fixed-wing UAV. The UAV surveyed a 25 km east-west transect dissecting the dark zone of the K-sector of the Greenland Ice Sheet on 8 August 2014. The camera has a 16 mm fixed focus lens (53.1 by 73.7° field of view) yielding an image footprint of approximately 525 x 350 m during the autonomous sortie. The camera was preset with a fixed shutter speed of 1/1000 s, ISO 100 and F-stop of 8. The images have a pixel footprint of approximately 11 cm. A corresponding csv file provides the UAV geolocation and attitude data for each image. The data were logged by an Arduino navigation and flight computer in real-time by a 10 Hz data stream comprising of a GPS, magnetometer, barometer and accelerometer.
    Keywords: ALTITUDE; File format; File name; File size; Kangerlussuaq-Sector; LATITUDE; LONGITUDE; Pitch angle; Roll angle; UAV; Uniform resource locator/link to file; Unmanned aerial vehicle; Yaw angle
    Type: Dataset
    Format: text/tab-separated-values, 441 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Extensive Liquid Meltwater Storage in Firn Within the Greenland Ice Sheet (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: The accelerating loss of mass from the Greenland ice sheet is a major contribution to current sea level rise. Increased melt water runoff is responsible for half of Greenlands mass loss increase. Surface melt has been increasing in extent and intensity, setting a record for surface area melt and runoff in 2012. The mechanisms and timescales involved in allowing surface melt water to reach the ocean where it can contribute to sea level rise are poorly understood. The potential capacity to store this water in liquid or frozen form in the firn (multi-year snow layer) is significant, and could delay its sea-level contribution. Here we describe direct observation of water within a perennial firn aquifer persisting throughout the winter in the southern ice sheet,where snow accumulation and melt rates are high. This represents a previously unknown storagemode for water within the ice sheet. Ice cores, groundairborne radar and a regional climatemodel are used to estimate aquifer area (70 plue or minus 10 x 10(exp 3) square kilometers ) and water table depth (5-50 m). The perennial firn aquifer represents a new glacier facies to be considered 29 in future ice sheet mass 30 and energy budget calculations.
    Keywords: Geosciences (General)
    Type: GSFC-E-DAA-TN12183
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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