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    Decadal-scale variations in ice flow along Whillans Ice Stream and its tributaries, West Antarctica

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    StearnsL_JoG_57(172)147.pdf (316.2Kb)
    Issue Date
    2005-01-01
    Author
    Stearns, Leigh A.
    Jezek, Kenneth C.
    van der Veen, Cornelis J.
    Publisher
    International Glaciological Society
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
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    Abstract
    We investigate velocity changes occurring along Whillans Ice Stream (WIS) by comparing velocities derived from repeat aerial photographs acquired in 1985–89 (average date of 1987) to interferometric satellite radar (InSAR) velocities collected in 1997. Three different analysis methods are applied to the velocity data. First, temporal and spatial changes in velocities are correlated to identifiable features (flowlines, shear margins, bed features) visible on the 1997 RADARSAT Antarctic Mapping Project mosaic. Second, we relate velocity gradients to stresses via the flow law and, along with surface topography and ice-thickness data, apply the force-budget technique to determine the relative importance of driving stress, side drag and basal drag over time. Finally, the mass balance of the main part of WIS is determined for 1987 and 1997. Our results are consistent with previous studies that show an overall deceleration resulting in downstream thickening of the ice stream (Whillans and others, 2001; Joughin and others, 2002).
    Description
    This is the published version, also available here: http://dx.doi.org/10.3189/172756505781829610.
    URI
    http://hdl.handle.net/1808/17237
    DOI
    https://doi.org/10.3189/172756505781829610
    ISSN
    0022-1430
    Collections
    • Environmental Studies Scholarly Works [62]
    • Geology Scholarly Works [247]
    Citation
    Stearns, L., Jezek, K., & Veen, C. (2005). Decadal-scale variations in ice flow along Whillans Ice Stream and its tributaries, West Antarctica. Journal of Glaciology, 51(172), 147-157, http://dx.doi.org/10.3189/172756505781829610

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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