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Descripción
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| An inventory of radio-echo sounded glaciers in Svalbard has been compiled with the aim of obtaining a reliable estimation of the total ice volume stored in Svalbard glaciers. To achieve this goal, a set of ice thickness data has been gathered from different sources and formats. Two main sets of GPR-retrieved thickness data can be distinguished. First, data from glaciers for which a rather complete net of GPR profiles is available, usually from ground-based echo sounding. Second, airborne echo sounding data which usually covers only the central flow line of the glacier. In this contribution we will focus on the techniques of volume estimation for these two data sets. In the first case, the volume computation from the ice thickness map is straightforward using the routines incorporated in the GIS software. Special attention will be paid to the analysis of errors involved, both regarding the radar data and the interpolation and volume computation. In the second case, the volume calculation involves some assumption about the shape of the cross section of the glacier valley. At the early state of our work we approximated the cross-section by a parabola, but this resulted in an underestimate by about 20%. Further work is in progress to improve such estimates; one of the approaches that we have considered takes into account geomorphological aspects of the glacier valley. | |
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Internacional
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No |
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Nombre congreso
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Workshop on the Dynamics and Mass Budget of Arctic Glaciers & the IASC Network on Arctic Glaciology Annual Meeting |
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Tipo de participación
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960 |
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Lugar del congreso
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Zieleniec, Poland |
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Revisores
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ISBN o ISSN
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DOI
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Fecha inicio congreso
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09/01/2012 |
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Fecha fin congreso
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12/01/2012 |
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Desde la página
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40 |
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Hasta la página
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42 |
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Título de las actas
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The Dynamics and Mass Budget of Arctic Glaciers |