• Login
    View Item 
    •   Home
    • University of Alaska Southeast
    • School of Arts and Sciences
    • Faculty and Staff
    • Amundson, Jason M.
    • View Item
    •   Home
    • University of Alaska Southeast
    • School of Arts and Sciences
    • Faculty and Staff
    • Amundson, Jason M.
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of Scholarworks@UACommunitiesPublication DateAuthorsTitlesSubjectsTypeThis CollectionPublication DateAuthorsTitlesSubjectsType

    My Account

    Login

    First Time Submitters, Register Here

    Register

    Statistics

    Display statistics

    Formation, flow and break-up of ephemeral ice mélange at LeConte Glacier and Bay, Alaska.

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Amundson et al 2020 JGlac - Jason ...
    Size:
    2.453Mb
    Format:
    PDF
    Description:
    article
    Download
    Author
    Amundson, Jason M.
    Kienholz, Christian
    Hager, Alexander O.
    Jackson, Rebecca H.
    Motyka, Roman J.
    Nash, Jonathan D.
    Sutherland, David A.
    Keyword
    Calving
    ice/ocean interactions
    icebergs
    Metadata
    Show full item record
    URI
    http://hdl.handle.net/11122/11343
    Abstract
    Ice mélange has been postulated to impact glacier and fjord dynamics through a variety of mechanical and thermodynamic couplings. However, observations of these interactions are very limited. Here, we report on glaciological and oceanographic data that were collected from 2016 to 2017 at LeConte Glacier and Bay, Alaska, and serendipitously captured the formation, flow and break-up of ephemeral ice mélange. Sea ice formed overnight in mid-February. Over the subsequent week, the sea ice and icebergs were compacted by the advancing glacier terminus, after which the ice mélange flowed quasi-statically. The presence of ice mélange coincided with the lowest glacier velocities and frontal ablation rates in our record. In early April, increasing glacier runoff and the formation of a sub-ice-mélange plume began to melt and pull apart the ice mélange. The plume, outgoing tides and large calving events contributed to its break-up, which took place over a week and occurred in pulses. Unlike observations from elsewhere, the loss of ice mélange integrity did not coincide with the onset of seasonal glacier retreat. Our observations provide a challenge to ice mélange models aimed at quantifying the mechanical and thermodynamic couplings between ice mélange, glaciers and fjords.
    Description
    © The Author(s), 2020. Published by Cambridge University Press. This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike licence (http://creativecommons.org/licenses/by-nc-sa/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the same Creative Commons licence is included and the original work is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use. Supplementary material. The supplementary material for this article can be found at https://doi.org/10.1017/jog.2020.29
    Date
    2020-05-14
    Source
    Journal of Glaciology
    Publisher
    Cambridge University Press
    Type
    Article
    Peer-Reviewed
    Yes
    Citation
    Amundson JM, Kienholz C, Hager AO, Jackson RH, Motyka RJ, Nash JD, Sutherland DA (2020). Formation, flow and break-up of ephemeral ice mélange at LeConte Glacier and Bay, Alaska. Journal of Glaciology 66(258), 577–590. https://doi.org/10.1017/jog.2020.29
    Collections
    Amundson, Jason M.

    entitlement

     
    ABOUT US|HELP|BROWSE|ADVANCED SEARCH

    The University of Alaska Fairbanks is an affirmative action/equal opportunity employer and educational institution and is a part of the University of Alaska system.

    ©UAF 2013 - 2023 | Questions? ua-scholarworks@alaska.edu | Last modified: September 25, 2019

    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.