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    Long-term analysis of sea ice drift in the western Ross sea, Antarctica, at high and low spatial resolution (2020)

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    Type of Content
    Journal Article
    UC Permalink
    https://hdl.handle.net/10092/101462
    
    Publisher's DOI/URI
    http://doi.org/10.3390/RS12091402
    
    Publisher
    MDPI AG
    ISSN
    2072-4292
    Language
    en
    Collections
    • Science: Journal Articles [979]
    Authors
    Farooq U, Rack W, McDonald A, Howell Sshow all
    Abstract

    © 2020 by the authors. The Ross Sea region, including three main polynya areas in McMurdo Sound, Terra Nova Bay, and in front of the Ross Ice Shelf, has experienced a significant increase in sea ice extent in the first four decades of satellite observations. Here, we use Co-Registration of Optically Sensed Images and Correlation (COSI-Corr) to estimate 894 high-resolution sea ice motion fields of the Western Ross Sea in order to explore ice-atmosphere interactions based on sequential high-resolution Advanced Synthetic Aperture Radar (ASAR) images from the Envisat satellite acquired between 2002-2012. Validation of output motion vectors with manually drawn vectors for 24 image pairs show Pearson correlation coefficients of 0.92 ± 0.09 with a mean deviation in direction of-3.17 ± 6.48 degrees. The high-resolution vectors were also validated against the Environment and Climate Change Canada sea ice motion tracking algorithm, resulting in correlation coefficients of 0.84 ± 0.20 and the mean deviation in the direction of-0.04 ± 17.39 degrees. A total of 480 one-day separated velocity vector fields have been compared to an available NSIDC low-resolution sea ice motion vector product, showing much lower correlations and high directional differences. The high-resolution product is able to better identify short-term and spatial variations, whereas the low-resolution product underestimates the actual sea ice velocities by 47% in this important near-coastal region. The large-scale pattern of sea ice drift over the full time period is similar in both products. Improved image coverage is still desired to capture drift variations shorter than 24 h.

    Citation
    Farooq U, Rack W, McDonald A, Howell S (2020). Long-term analysis of sea ice drift in the western Ross sea, Antarctica, at high and low spatial resolution. Remote Sensing. 12(9). 1402-1402.
    This citation is automatically generated and may be unreliable. Use as a guide only.
    Keywords
    sea ice; motion tracking; Envisat ASAR; Polar Pathfinder; NSIDC; Western Ross Sea; Synthetic Aperture Radar; COSI-Corr
    ANZSRC Fields of Research



    37 - Earth sciences::3709 - Physical geography and environmental geoscience::370901 - Geomorphology and earth surface processes
    40 - Engineering::4013 - Geomatic engineering::401304 - Photogrammetry and remote sensing
    Rights
    All rights reserved unless otherwise stated
    http://hdl.handle.net/10092/17651
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