An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica

S. S. R. S. R. Jamieson, N. Ross, J. S. S. Greenbaum, D. A. A. Young, Alan R. A. Aitken, J. L. L. Roberts, D. D. D. Blankenship, S. Bo, M. J. J. Siegert

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    The subglacial landscape of Princess Elizabeth Land (PEL) in East Antarctica is poorly known due to a paucity of ice thickness measurements. This is problematic given its importance for understanding ice sheet dynamics and landscape and climate evolution. To address this issue, we describe the topography beneath the ice sheet by assuming that ice surface expressions in satellite imagery relate to large-scale subglacial features. We find evidence that a large, previously undiscovered subglacial drainage network is hidden beneath the ice sheet in PEL. We interpret a discrete feature that is 140 x 20 km in plan form, and multiple narrow sinuous features that extend over a distance of similar to 1100 km. We hypothesize that these are tectonically controlled and relate to a large subglacial basin containing a deep-water lake in the interior of PEL linked to a series of long, deep canyons. The presence of 1-km-deep canyons is confirmed at a few localities by radio-echo sounding data, and drainage analysis suggests that these canyons will direct subglacial meltwater to the coast between the Vestfold Hills and the West Ice Shelf.
    Original languageEnglish
    Pages (from-to)87-90
    Number of pages4
    JournalGeology
    Volume44
    Issue number2
    DOIs
    Publication statusPublished - 2016

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    canyon
    ice sheet
    lake
    echo sounding
    drainage network
    ice shelf
    ice thickness
    meltwater
    satellite imagery
    deep water
    topography
    drainage
    radio
    ice
    coast
    climate
    basin
    Antarctica
    land
    analysis

    Cite this

    Jamieson, S. S. R. S. R., Ross, N., Greenbaum, J. S. S., Young, D. A. A., Aitken, A. R. A., Roberts, J. L. L., ... Siegert, M. J. J. (2016). An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica. Geology, 44(2), 87-90. https://doi.org/10.1130/G37220.1
    Jamieson, S. S. R. S. R. ; Ross, N. ; Greenbaum, J. S. S. ; Young, D. A. A. ; Aitken, Alan R. A. ; Roberts, J. L. L. ; Blankenship, D. D. D. ; Bo, S. ; Siegert, M. J. J. / An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica. In: Geology. 2016 ; Vol. 44, No. 2. pp. 87-90.
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    abstract = "The subglacial landscape of Princess Elizabeth Land (PEL) in East Antarctica is poorly known due to a paucity of ice thickness measurements. This is problematic given its importance for understanding ice sheet dynamics and landscape and climate evolution. To address this issue, we describe the topography beneath the ice sheet by assuming that ice surface expressions in satellite imagery relate to large-scale subglacial features. We find evidence that a large, previously undiscovered subglacial drainage network is hidden beneath the ice sheet in PEL. We interpret a discrete feature that is 140 x 20 km in plan form, and multiple narrow sinuous features that extend over a distance of similar to 1100 km. We hypothesize that these are tectonically controlled and relate to a large subglacial basin containing a deep-water lake in the interior of PEL linked to a series of long, deep canyons. The presence of 1-km-deep canyons is confirmed at a few localities by radio-echo sounding data, and drainage analysis suggests that these canyons will direct subglacial meltwater to the coast between the Vestfold Hills and the West Ice Shelf.",
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    Jamieson, SSRSR, Ross, N, Greenbaum, JSS, Young, DAA, Aitken, ARA, Roberts, JLL, Blankenship, DDD, Bo, S & Siegert, MJJ 2016, 'An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica' Geology, vol. 44, no. 2, pp. 87-90. https://doi.org/10.1130/G37220.1

    An extensive subglacial lake and canyon system in Princess Elizabeth Land, East Antarctica. / Jamieson, S. S. R. S. R.; Ross, N.; Greenbaum, J. S. S.; Young, D. A. A.; Aitken, Alan R. A.; Roberts, J. L. L.; Blankenship, D. D. D.; Bo, S.; Siegert, M. J. J.

    In: Geology, Vol. 44, No. 2, 2016, p. 87-90.

    Research output: Contribution to journalArticle

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