Memorias de investigación
Artículos en revistas:
Surface velocity and ice discharge of the ice cap on King George Island, Antarctica
Año:2013
Áreas de investigación
  • Ciencias de la tierra
Datos
Descripción
Glaciers on King George Island, Antarctica, have shown retreat and surface lowering in recent decades, concurrent with increasing air temperatures. A large portion of the glacier perimeter is ocean-terminating, suggesting possible large mass losses due to calving and submarine melting. Here we estimate the ice discharge into the ocean for the King George Island ice cap. L-band synthetic aperture radar images covering the time-span January 2008 to January 2011 over King George Island are processed using an intensity-tracking algorithm to obtain surface velocity measurements. Pixel offsets from 40 pairs of radar images are analysed and inverted to estimate a weighted average surface velocity field. Ice thicknesses are derived from simple principles of ice flow mechanics using the computed surface velocity fields and in situ thickness data. The maximum ice surface speeds reach > 225 m/yr, and the total ice discharge for the analysed flux gates of King George Island is estimated to be 0.720+/-0.428 Gt/yr, corresponding to a specific mass loss of 0.64+/-0.38 m w.e./yr over the area of the entire ice cap (1127 km2).
Internacional
Si
JCR del ISI
Si
Título de la revista
ANNALS OF GLACIOLOGY
ISSN
0260-3055
Factor de impacto JCR
1,8
Información de impacto
Volumen
54
DOI
10.3189/2013AoG63A517
Número de revista
63
Desde la página
111
Hasta la página
119
Mes
SIN MES
Ranking
0
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Grupo de Simulación Numérica en Ciencias e Ingeniería
  • Departamento: Matemática Aplicada a las Tecnologías de la Información