• Login
    View Item 
    •   DSpace Home
    • SUNY Brockport
    • Events/Conferences
    • 2015 SUNY Undergraduate Research Conference
    • View Item
    •   DSpace Home
    • SUNY Brockport
    • Events/Conferences
    • 2015 SUNY Undergraduate Research Conference
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    VALLEY GLACIER RESPONSE TO LATE HOLOCENE CLIMATE CHANGE: THE ROLE OF GLACIER GEOMETRY AND FOREFIELD CHARACTERISTICS IN INFLUENCING THE MAGNITUDE OF ADVANCES

    Thumbnail
    View/Open
    surc/2015/schedule/226/fulltext (1).pdf (19.07Kb)
    Date
    2015-04-10
    Author
    Taylor, Shawn P.
    Metadata
    Show full item record
    Subject
    Glaciers
    Alaska
    Non-Climatic
    Late Holocene
    Climate Change
    Geometry
    Slope
    Forefield
    Little Ice Age
    Physical Characteristics
    Abstract
    Tree-ring dates show that valley glaciers in coastal south-central Alaska have made multiple advances during the late Holocene. While the timing of these advances has generally been synchronous throughout the region, termini have differed in the distances they reached down-valley. As a result, dates of outermost Holocene moraines range in age from C.E. 1710s to early 1900s, and the regionally prominent 1870s-1900s moraine varies from being a terminal moraine to a recessional moraine at different forefields. Because adjacent termini often show these differences in outermost moraine age, it seems unlikely that this variability is due to regional variability in the magnitude of the climatic forcing. Rather, we hypothesize that localized glacier-specific effects have filtered the climatic forcing to cause some glaciers to advance farther than others in response to the same climate changes. In this study we test this hypothesis using a dataset of 36 glaciers in coastal south-central Alaska for which previous work has provided dates of terminal moraines. Glacier boundaries for the mid 20th century were delineated from U.S.G.S. topographic maps in ArcGIS 10.2 and used to clip digital elevation models for each glacier. These were then used to determine glacier areas, high and low elevations, hypsometries, flow lengths, and slopes. Correlation of these variables with outermost moraine dates found a significant relationship for slope at the 95% confidence level, with steeper glaciers having generally older outermost moraines; other geometric factors did not show significant relationships. This result is consistent with other studies that have found steeper glaciers to be different to less steep glaciers in their response to 20th century climate change. Ongoing work is examining the possible roles of forefield geometry, geology, and geomorphology in influencing the magnitude of late Holocene advances.
    URI
    http://hdl.handle.net/1951/72662
    Collections
    • 2015 SUNY Undergraduate Research Conference [409]

    SUNY Digital Repository Support
    DSpace software copyright © 2002-2022  DuraSpace
    Contact Us | Send Feedback
    DSpace Express is a service operated by 
    Atmire NV
     

     


    SUNY Digital Repository Support
    DSpace software copyright © 2002-2022  DuraSpace
    Contact Us | Send Feedback
    DSpace Express is a service operated by 
    Atmire NV