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School of Management and Social Sciences Research Seminar

Date:
Wednesday 18th February 2015

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Clean and Dirty Waters: Fluvio-glacial responses to High-Arctic deglaciation

Where: St Mary's University, Twickenham, Room D10 When: Wednesday 18th February, 4 - 5pm Contact: For further information, please contact victoria.armstrong@stmarys.ac.uk Speaker: Dr Phil Porter, School of Life and Medical Science, University of Hertfordshire Abstract: Preliminary observations in the High-Arctic have shown that mobilisation of thawing ice-marginal slopes may represent a significant source of sediment in deglaciating catchments. Analysis of remotely sensed imagery has allowed identification of several areas on the Austre Brøggerbreen glacier, Svalbard, where this process is taking place. These locations were subsequently confirmed through field observation. Detailed field measurements of sediment delivery and movement were therefore undertaken in order to assess the significance of ice-marginal sediment delivery to the glacier hydrological and sedimentary systems. Sensors installed within ice-marginal slope deposits, combined with time-lapse photography, confirm that collapse of thawing ice-marginal deposits delivers significant quantities of sediment to the glacier surface and that this sediment then comprises a significant portion of the overall sediment load carried through and from the glacier by meltwaters. These findings confirm the importance of ice marginal slope collapse and resultant delivery of sediments, to the overall sediment yield of deglaciating regions.
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Date:
Wednesday 18th February 2015

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For more information about this event please email conferences@stmarys.ac.uk or call 020 8240 8219.

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