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    Airborne-radar and ice-core observations of annual snow accumulation over Thwaites Glacier, West Antarctica confirm the spatiotemporal variability of global and regional atmospheric models

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    Date
    2013-07-26
    Author
    Medley, Brooke  Concept link
    Joughin, Ian  Concept link
    Das, Sarah B.  Concept link
    Steig, Eric J.  Concept link
    Conway, Howard  Concept link
    Gogineni, S.  Concept link
    Criscitiello, Alison S.  Concept link
    McConnell, Joseph R.  Concept link
    Smith, B. E.  Concept link
    van den Broeke, Michiel R.  Concept link
    Lenaerts, Jan T. M.  Concept link
    Bromwich, D. H.  Concept link
    Nicolas, J. P.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/6234
    As published
    https://doi.org/10.1002/grl.50706
    DOI
    10.1002/grl.50706
    Keyword
     West Antarctica; Snow accumulation; Airborne radar; Firn 
    Abstract
    We use an airborne-radar method, verified with ice-core accumulation records, to determine the spatiotemporal variations of snow accumulation over Thwaites Glacier, West Antarctica between 1980 and 2009. We also present a regional evaluation of modeled accumulation in Antarctica. Comparisons between radar-derived measurements and model outputs show that three global models capture the interannual variability well (r > 0.9), but a high-resolution regional model (RACMO2) has better absolute accuracy and captures the observed spatial variability (r = 0.86). Neither the measured nor modeled accumulation records over Thwaites Glacier show any trend since 1980. Although an increase in accumulation may potentially accompany the observed warming in the region, the projected trend is too small to detect over the 30 year record.
    Description
    Author Posting. © American Geophysical Union, 2013. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 40 (2013): 3649–3654, doi:10.1002/grl.50706.
    Collections
    • Geology and Geophysics (G&G)
    Suggested Citation
    Geophysical Research Letters 40 (2013): 3649–3654
     

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