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Ice Dynamics
I had earlier investigated the surge behaviour of sub-polar glaciers with Tavi Murray (Leeds) and Andrew Fowler (Oxford) and recently turned my attention to the Antarctic ice streams, whose variable flow exerts strong control on ice-sheet mass balance.
With Howard Conway (Seattle), I used the radar structures in Kamb Ice Stream to infer its flow speed before it stopped ~150 years ago. Ongoing work considers the general problem of deciphering the history of ice flow from englacial radar layers.
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Radar X-section of Kamb Ice Stream, showing undulating layers in ice ~1800 m deep (horizontal axis in km)
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Model of isochrone-layer deformation along a flow band in an ice stream
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