Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Ice thickness, internal structure and subglacial topography of Bowles Plateau ice cap and the main ice divides of Livingston Island, Antarctica, by ground-based radio-echo sounding
Year:2009
Research Areas
  • Geophysics
Information
Abstract
We present the results of low-frequency (20 MHz) radio-echo sounding (RES) carried out in December 2000 and December 2006 on the main ice divides of Livingston Island, South Shetland Islands (SSI), Antarctica, and Bowles Plateau, Antarctica, respectively, as well as high-frequency (200 MHz) RES on the latter, aimed at determining the ice thickness, internal structure and subglacial relief. Typical ice thickness along the main ice divides is ~150 m, reaching maxima of ~200 m. On Bowles Plateau the ice is much thicker, with an average of 265 m and maxima of ~500 m. The bed below the main ice divides is above sea level, while part of the outlet glaciers from Bowles Plateau lies significantly below sea level, down to ¿120 m. The strong scattering of the radio waves in the areas under study constitutes further evidence that the ice in the accumulation area of the ice masses of the SSI is temperate. Typical thickness of the firn layer in Bowles Plateau is 20-35 m, similar to that found in King George ice cap. A strong internal reflector within the firn layer, interpreted as a tephra layer from the 1970 eruption at Deception Island, has allowed a rough estimate of the specific mass balances for Bowles Plateau within 0.20-0.40 m a¿1 w.e., as average values for the period 1970-2006.
International
Si
JCR
Si
Title
ANNALS OF GLACIOLOGY
ISBN
0260-3055
Impact factor JCR
0,802
Impact info
Volume
50
10.3189/172756409789097478
Journal number
51
From page
49
To page
56
Month
AGOSTO
Ranking
Participants
  • Autor: Jaime Otero Garcia (UPM)
  • Autor: Francisco Jose Navarro Valero (UPM)
  • Autor: Maria Isabel de Corcuera Labrado (UPM)
  • Autor: Maria Luisa Cuadrado Ebrero (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Simulación Numérica en Ciencias e Ingeniería
  • Departamento: Matemática Aplicada a las Tecnologías de la Información
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