Glaciología

Glaciares de Chile

Antártica

"Ellsworth Subglacial Lake, West Antarctica: A Review of Its History and Recent Field Campaigns"

Ross, N., M. Siegert, A. Rivera, M. Bentley, D. Blake, L. Capper, R. Clarke, C. Cockell, H. Corr, W. Harris, C. Hill, R. Hindmarsh, D. Hodgson, E. King, H. Lamb, B. Maher, K. Makinson, M. Mowlem, J. Parnell, D. Pearce, J. Priscu, A. Smith, A. Tait, M.Tranter, J. Wadham, W. Whalley, & J. Woodward (2011) : “Ellsworth Subglacial Lake, West Antarctica: A Review of Its History and Recent Field Campaigns” Antarctic Subglacial Aquatic Environments, 221-233.

Resumen / Abstract.

Ellsworth Subglacial Lake, first observed in airborne radio echo sounding data acquired in 1978, is located within a long, deep subglacial trough within the Ellsworth Subglacial Highlands of West Antarctica. Geophysical surveys have characterized the lake, its subglacial catchment, and the thickness, structure, and flow of the overlying ice sheet. Covering 28.9 km2, Ellsworth Subglacial Lake is located below 2.9 to 3.3 km of ice at depths of -1361 to -1030 m. Seismic reflection data have shown the lake to be up to 156 m deep and underlain by unconsolidated sediments. Ice sheet flow over the lake is characterized by low velocities (<6 m yr-1), flow convergence, and longitudinal extension. The lake appears to be in steady state, although the hydrological balance may vary over glacial-interglacial cycles.

 

 

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