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    Icebergs and sea ice detected with inverted echo sounders

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    jtech-d-14-00161%2E1.pdf (2.517Mb)
    Date
    2015-05
    Author
    Andres, Magdalena  Concept link
    Silvano, Alessandro  Concept link
    Straneo, Fiamma  Concept link
    Watts, D. Randolph  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/7331
    As published
    https://doi.org/10.1175/JTECH-D-14-00161.1
    DOI
    10.1175/JTECH-D-14-00161.1
    Keyword
     Glaciers; Sea ice; Ice thickness; Data processing; In situ oceanic observations; Instrumentation/sensors 
    Abstract
    A 1-yr experiment using a pressure-sensor-equipped inverted echo sounder (PIES) was conducted in Sermilik Fjord in southeastern Greenland (66°N, 38°E) from August 2011 to September 2012. Based on these high-latitude data, the interpretation of PIESs’ acoustic travel-time records from regions that are periodically ice covered were refined. In addition, new methods using PIESs for detecting icebergs and sea ice and for estimating iceberg drafts and drift speeds were developed and tested. During winter months, the PIES in Sermilik Fjord logged about 300 iceberg detections and recorded a 2-week period in early March of land-fast ice cover over the instrument site, consistent with satellite synthetic aperture radar (SAR) imagery. The deepest icebergs in the fjord were found to have keel depths greater than approximately 350 m. Average and maximum iceberg speeds were approximately 0.2 and 0.5 m s−1, respectively. The maximum tidal range at the site was ±1.8 m and during neap tides the range was ±0.3 m, as shown by the PIES’s pressure record.
    Description
    Author Posting. © American Meteorological Society, 2015. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Atmospheric and Oceanic Technology 32 (2015): 1042–1057, doi:10.1175/JTECH-D-14-00161.1.
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    • Physical Oceanography (PO)
    Suggested Citation
    Journal of Atmospheric and Oceanic Technology 32 (2015): 1042–1057
     
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