Massive Ice Layer Formed by Refreezing of Ice-shelf Surface Melt Ponds: Larsen C Ice Shelf, Antarctica
Surface melt ponds now form frequently on ice shelves across the northern sector of the Antarctic Peninsula in response to regional warming and local föhn winds. A potentially important, but hitherto unknown, consequence of this surface melting and ponding is the formation of high-density near-surfa...
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ftawi:oai:epic.awi.de:40729 2024-09-15T17:47:05+00:00 Massive Ice Layer Formed by Refreezing of Ice-shelf Surface Melt Ponds: Larsen C Ice Shelf, Antarctica Hubbard, Bryn Luckman, Adrian J. Ashmore, Dave Bevan, Suzanne Kulessa, Bernd Kuipers Munneke, Peter Jansen, Daniela O'Leary, Martin 2016-04-19 application/pdf https://epic.awi.de/id/eprint/40729/ https://epic.awi.de/id/eprint/40729/1/EGU2016Hubbard.pdf https://hdl.handle.net/10013/epic.47802 https://hdl.handle.net/10013/epic.47802.d001 unknown https://epic.awi.de/id/eprint/40729/1/EGU2016Hubbard.pdf https://hdl.handle.net/10013/epic.47802.d001 Hubbard, B. , Luckman, A. J. , Ashmore, D. , Bevan, S. , Kulessa, B. , Kuipers Munneke, P. , Jansen, D. orcid:0000-0002-4412-5820 and O'Leary, M. (2016) Massive Ice Layer Formed by Refreezing of Ice-shelf Surface Melt Ponds: Larsen C Ice Shelf, Antarctica , EGU General Assembly 2016, Vienna, Austria, 17 April 2016 - 22 April 2016 . hdl:10013/epic.47802 EPIC3EGU General Assembly 2016, Vienna, Austria, 2016-04-17-2016-04-22 Conference notRev 2016 ftawi 2024-06-24T04:14:20Z Surface melt ponds now form frequently on ice shelves across the northern sector of the Antarctic Peninsula in response to regional warming and local föhn winds. A potentially important, but hitherto unknown, consequence of this surface melting and ponding is the formation of high-density near-surface ice from the refreezing of that water. We report the discovery and physical character of a massive subsurface ice layer located in an area of intense melting and intermittent ponding on Larsen C Ice Shelf, Antarctica. We combine borehole optical televiewer logging and ground-based radar measurements with remote sensing and firn modelling to investigate the formation and spatial extent of this layer, found to be tens of kilometres across and tens of metres deep. The presence of this ice layer has the effect of raising local ice shelf density by about 190 kgm-3 and temperature by 5 - 10 degrees C above values found in areas unaffected by ponding and hitherto used in models of ice-shelf fracture and flow. Conference Object Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Ice Shelves Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Surface melt ponds now form frequently on ice shelves across the northern sector of the Antarctic Peninsula in response to regional warming and local föhn winds. A potentially important, but hitherto unknown, consequence of this surface melting and ponding is the formation of high-density near-surface ice from the refreezing of that water. We report the discovery and physical character of a massive subsurface ice layer located in an area of intense melting and intermittent ponding on Larsen C Ice Shelf, Antarctica. We combine borehole optical televiewer logging and ground-based radar measurements with remote sensing and firn modelling to investigate the formation and spatial extent of this layer, found to be tens of kilometres across and tens of metres deep. The presence of this ice layer has the effect of raising local ice shelf density by about 190 kgm-3 and temperature by 5 - 10 degrees C above values found in areas unaffected by ponding and hitherto used in models of ice-shelf fracture and flow. |
format |
Conference Object |
author |
Hubbard, Bryn Luckman, Adrian J. Ashmore, Dave Bevan, Suzanne Kulessa, Bernd Kuipers Munneke, Peter Jansen, Daniela O'Leary, Martin |
spellingShingle |
Hubbard, Bryn Luckman, Adrian J. Ashmore, Dave Bevan, Suzanne Kulessa, Bernd Kuipers Munneke, Peter Jansen, Daniela O'Leary, Martin Massive Ice Layer Formed by Refreezing of Ice-shelf Surface Melt Ponds: Larsen C Ice Shelf, Antarctica |
author_facet |
Hubbard, Bryn Luckman, Adrian J. Ashmore, Dave Bevan, Suzanne Kulessa, Bernd Kuipers Munneke, Peter Jansen, Daniela O'Leary, Martin |
author_sort |
Hubbard, Bryn |
title |
Massive Ice Layer Formed by Refreezing of Ice-shelf Surface Melt Ponds: Larsen C Ice Shelf, Antarctica |
title_short |
Massive Ice Layer Formed by Refreezing of Ice-shelf Surface Melt Ponds: Larsen C Ice Shelf, Antarctica |
title_full |
Massive Ice Layer Formed by Refreezing of Ice-shelf Surface Melt Ponds: Larsen C Ice Shelf, Antarctica |
title_fullStr |
Massive Ice Layer Formed by Refreezing of Ice-shelf Surface Melt Ponds: Larsen C Ice Shelf, Antarctica |
title_full_unstemmed |
Massive Ice Layer Formed by Refreezing of Ice-shelf Surface Melt Ponds: Larsen C Ice Shelf, Antarctica |
title_sort |
massive ice layer formed by refreezing of ice-shelf surface melt ponds: larsen c ice shelf, antarctica |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/40729/ https://epic.awi.de/id/eprint/40729/1/EGU2016Hubbard.pdf https://hdl.handle.net/10013/epic.47802 https://hdl.handle.net/10013/epic.47802.d001 |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Ice Shelves |
op_source |
EPIC3EGU General Assembly 2016, Vienna, Austria, 2016-04-17-2016-04-22 |
op_relation |
https://epic.awi.de/id/eprint/40729/1/EGU2016Hubbard.pdf https://hdl.handle.net/10013/epic.47802.d001 Hubbard, B. , Luckman, A. J. , Ashmore, D. , Bevan, S. , Kulessa, B. , Kuipers Munneke, P. , Jansen, D. orcid:0000-0002-4412-5820 and O'Leary, M. (2016) Massive Ice Layer Formed by Refreezing of Ice-shelf Surface Melt Ponds: Larsen C Ice Shelf, Antarctica , EGU General Assembly 2016, Vienna, Austria, 17 April 2016 - 22 April 2016 . hdl:10013/epic.47802 |
_version_ |
1810495673951322112 |