| Title | Hydrological connections between Antarctic subglacial lakes, the flow of water beneath the East Antarctic ice sheet and implications for sedimentary processes |
| Author | Siegert, M.J.; Le Brocq, A.; Payne, A.J. |
| Author Affil | Siegert, M.J., University of Edinburgh, School of GeoSciences, Edinburgh, United Kingdom. Other: University of Cambridge, United Kingdom; University of Bristol, United Kingdom |
| Source | Glacial sedimentary processes and products, edited by M.J. Hambrey, P. Christofferson, N.F. Glasser and B. Hubbard. Special Publication of the International Association of Sedimentologists, Vol.39, p.3- 10, . Publisher: Blackwell, Oxford, International. ISSN: 0141-3600. ISBN: 978-1- 4051-8300-0 |
| Publication Date | 2007 |
| Notes | In English. 21 refs. GeoRef Acc. No: 284488. CRREL Acc. No: 62004779 |
| Index Terms | hydrodynamics; hydrology; lakes; sedimentation; Antarctica--Dome C; Antarctica- -East Antarctic ice sheet; Antarctic ice sheet; Antarctica; discharge; Dome C; East Antarctic ice sheet; fluvial sedimentation; glacial sedimentation; glaciofluvial sedimentation; jokulhlaups; Lake Concordia; Lake Vincennes; subglacial environment; subglacial lakes; Wilkes Land |
| Abstract | Subglacial lakes are commonly referred to as unique environments isolated for millions of years. The recent detection of a rapid transmission of water between subglacial lakes indicates, however, that these environments may be connected hydrologically and that sporadic discharge of lake water may be an expected process. Knowledge of this flow at a continental scale is important to understanding habitats provided by subglacial lakes, the potential routes by which stored basal water can be exported to the ice margin and the development of glacial-fluvial landforms. Here, an assessment of Antarctic subglacial water flow-paths is presented, based on hydro- potential gradients derived from basal and ice surface topographies. The assessment reveals that most subglacial lakes around Dome C are likely to be linked. One flow-path in particular connects ›10 lakes located within adjacent topographic valleys, including Lake Concordia and Lake Vincennes. Subglacial water at Dome C has the potential to flow to the ocean, as the ice base is warm continuously between the ice divide and the margin. Such flow is likely to be organised into distinct drainage basins, in which water is routed to the proglacial zone through only a small number of outlets, which potentially has a strong influence on the development of sedimentary landforms. |
| Publication Type | journal article |
| Record ID | 84090 |