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  1. Catastrophic ice shelf breakup as the source of Heinrich event icebergs

    Heinrich layers of the glacial North Atlantic record abrupt widespread iceberg rafting of detrital carbonate and other lithic material at the extreme-cold culminations of Bond climate cycles. Both internal...

  2. An Ice Shelf Mechanism for Heinrich Layer Production

    The effect of an ice shelf in the Labrador Sea on ice-rafted sediment delivery to the glacial North Atlantic is investigated using a finite element numerical model of ice shelf flow. Discharge into the shelf...

  3. Subglacial thermal balance permits ongoing grounding line retreat along the Siple Coast of West Antarctica

    Changes in the discharge of West Antarctic ice streams are of potential concern with respect to global sea level. The six relatively thin, fast-flowing Ross ice streams are of interest as low-slope end-members...

  4. West Antarctic ice stream discharge variability: mechanism, controls, and pattern of grounding line retreat

    West Antarctic ice streams show pronounced flow variability in their downstream reaches, with changes stranding formerly fast-flowing ice and redirecting discharge. A simple model, in which the temperature...

  5. A New Numerical Model of Coupled Inland Ice Sheet, Ice Stream, and Ice Shelf Flow and its Application to the West Antarctic...

    We have developed a dynamic/thermodynamic finite element numerical model that couples inland ice sheet, ice stream, and ice shelf dynamics. This new model stands apart from other whole ice sheet models in its...

  6. A Method for Determining Ice-Thickness Change at Remote Locations using GPS

    Ice-thickness changes at remote locations on ice sheets can be determined by means of precise Global Positioning System (GPS) surveys with interferometric solutions. Remote sites are precisely surveyed relative...

  7. Women in Glaciology, an Historical Perspective

    Women's history in glaciology extends as far back in time as the discipline itself, although their contributions to the scientific discourse have for all of that history been constrained by the sociopolitical...

  8. Force Balance along an Inland Tributary and Onset to Ice Stream D, West Antarctica

    The transition from inland- to streaming-style ice flow near to and upstream from the onset to Ice Stream D, West Antarctica, is investigated using the force- balance technique. Basal drag provides the majority...

  9. Comparison of Ice-shelf Creep Flow Simulations with Ice-front Motion of Filchner-Ronne Ice Shelf, Antarctica, Detected by SAR...

    Comparison between numerical model ice-shelf flow simulations and synthetic aperture radar (SAR) interferograms is used to study ice-flow dynamics at the Hemmen Ice Rise (HIR) and Lassiter Coast (LC) corners of...

  10. The Role of Lateral and Vertical Shear in Tributary Flow toward a West Antarctic Ice Stream

    Narrow lateral shear margins are the most distinctive visual feature of the West Antarctic ice streams. Large shear stresses within these layers support the majority of the gravitational driving stress within a...

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