Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Preliminary Results of the relation between Ice Viscosity and Water Content using an Inverse Method
Year:2013
Research Areas
  • Earth sciences,
  • Information technology and adata processing
Information
Abstract
One of the outstanding problems of the modelling of temperate ice dynamics is the limited knowledge on the rheology of temperate ice and, in particular, on how the rate factor depends on the liquid water content. Though it is well known that the rate factor depends strongly on the water content, in practice the only available experimentally-based relationship is that by Duval (1977), which is only valid for water contents up to 1%. However, actual water contents found in temperate and polythermal glaciers are sometimes substantially larger. It is possible, though logistically and computationally difficult, to estimate the spatial distribution of the water content from GPR data. If a relationship between rate factor and water content spanning the entire range of water content found in temperate ice were available, it would be possible to infer the spatial distribution of the rate factor, which would substantially improve the modelling of glacier dynamics.We use an inverse method to infer, from glacier geometry and surface velocities, the spatial distribution of the rate factor. This distribution can be compared with that obtained from GPR data with the aim to obtain a rate factor-water content relationship.
International
Si
Congress
Congreso de Métodos Numéricos en Ingeniería CMN 2013, 25-28 Junio 2013,
960
Place
Bilbao, España.
Reviewers
Si
ISBN/ISSN
978-84-941531-4-3
Start Date
25/07/2013
End Date
28/07/2013
From page
773
To page
773
Congreso de Métodos Numéricos en Ingeniería CMN 2013, 25-28 Junio 2013, Bilbao, España. International Center for Numerical Methods in Engineering (CIMNE), Barcelona, España, 2013,
Participants
  • Autor: Jaime Otero Garcia (UPM)
  • Autor: Francisco Jose Navarro Valero (UPM)
  • Autor: Javier Jesus Lapazaran Izargain (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Simulación Numérica en Ciencias e Ingeniería
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