Multi-year/multi-decade ice about Mertz Glacier, East Antarctica, and its temporal evolution
Large areas of multi-year and multi-decade sea ice occur to the east of the Mertz Glacier Tongue (MGT) in East Antarctica. Measurements of the free-board height of this ice obtained by satellite-borne laser and radar altimeters indicates that the ice is many metres thick and in places tens of metres...
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ftunivtasecite:oai:ecite.utas.edu.au:90788 2023-05-15T13:37:23+02:00 Multi-year/multi-decade ice about Mertz Glacier, East Antarctica, and its temporal evolution Young, NW Lieser, JL Massom, RA Fraser, Alexander Donald Floricioiu, D 2014 http://ecite.utas.edu.au/90788 en eng International Glaciological Society Young, NW and Lieser, JL and Massom, RA and Fraser, Alexander Donald and Floricioiu, D, Multi-year/multi-decade ice about Mertz Glacier, East Antarctica, and its temporal evolution, International Symposium on Sea Ice in a Changing Environment - Proceedings of the Hobart Symposium, 10-14 March 2014, Hobart, Tasmania, Australia, pp. 69A881. (2014) [Conference Extract] http://ecite.utas.edu.au/90788 Earth Sciences Oceanography Physical Oceanography Conference Extract NonPeerReviewed 2014 ftunivtasecite 2019-12-13T21:54:06Z Large areas of multi-year and multi-decade sea ice occur to the east of the Mertz Glacier Tongue (MGT) in East Antarctica. Measurements of the free-board height of this ice obtained by satellite-borne laser and radar altimeters indicates that the ice is many metres thick and in places tens of metres thick. Visual observations from ships of the above water layers of thick floes from the region suggest that the free-board is composed of snow. Snow accumulation rate for the region is estimated at around 1 m a1 from firn core data retrieved from the large iceberg B09B when it was grounded to the east of MGT. So the primary process contributing to the large thickness of the floes appears to be accumulation of snow at the surface and flooding to create snow-ice. The thick ice in the region has been described as landfast, however long fractures do form through the ice-field and allow the ice to diverge somewhat and move. But, the ice floes typically remain in place. They converge again, and export of ice appears to occur rarely. Re-location of iceberg B09B and calving of MGT in early 2010 brought about major changes. Large sections broke-up and drifted out to the west through what was the location of the Mertz Glacier polynya. The breakup and melting of the snow cover introduced a fresh-water pulse into the upper layers of the ocean in the region. We derive the temporal evolution of the spatial distribution of this thick ice and its growth through analysis of time series of SAR images and altimeter data from ICESat and CryoSat-2. Conference Object Antarc* Antarctica East Antarctica Mertz Glacier Sea ice eCite UTAS (University of Tasmania) East Antarctica Mertz Glacier ENVELOPE(144.500,144.500,-67.667,-67.667) Mertz Glacier Tongue ENVELOPE(145.500,145.500,-67.167,-67.167) |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Physical Oceanography |
spellingShingle |
Earth Sciences Oceanography Physical Oceanography Young, NW Lieser, JL Massom, RA Fraser, Alexander Donald Floricioiu, D Multi-year/multi-decade ice about Mertz Glacier, East Antarctica, and its temporal evolution |
topic_facet |
Earth Sciences Oceanography Physical Oceanography |
description |
Large areas of multi-year and multi-decade sea ice occur to the east of the Mertz Glacier Tongue (MGT) in East Antarctica. Measurements of the free-board height of this ice obtained by satellite-borne laser and radar altimeters indicates that the ice is many metres thick and in places tens of metres thick. Visual observations from ships of the above water layers of thick floes from the region suggest that the free-board is composed of snow. Snow accumulation rate for the region is estimated at around 1 m a1 from firn core data retrieved from the large iceberg B09B when it was grounded to the east of MGT. So the primary process contributing to the large thickness of the floes appears to be accumulation of snow at the surface and flooding to create snow-ice. The thick ice in the region has been described as landfast, however long fractures do form through the ice-field and allow the ice to diverge somewhat and move. But, the ice floes typically remain in place. They converge again, and export of ice appears to occur rarely. Re-location of iceberg B09B and calving of MGT in early 2010 brought about major changes. Large sections broke-up and drifted out to the west through what was the location of the Mertz Glacier polynya. The breakup and melting of the snow cover introduced a fresh-water pulse into the upper layers of the ocean in the region. We derive the temporal evolution of the spatial distribution of this thick ice and its growth through analysis of time series of SAR images and altimeter data from ICESat and CryoSat-2. |
format |
Conference Object |
author |
Young, NW Lieser, JL Massom, RA Fraser, Alexander Donald Floricioiu, D |
author_facet |
Young, NW Lieser, JL Massom, RA Fraser, Alexander Donald Floricioiu, D |
author_sort |
Young, NW |
title |
Multi-year/multi-decade ice about Mertz Glacier, East Antarctica, and its temporal evolution |
title_short |
Multi-year/multi-decade ice about Mertz Glacier, East Antarctica, and its temporal evolution |
title_full |
Multi-year/multi-decade ice about Mertz Glacier, East Antarctica, and its temporal evolution |
title_fullStr |
Multi-year/multi-decade ice about Mertz Glacier, East Antarctica, and its temporal evolution |
title_full_unstemmed |
Multi-year/multi-decade ice about Mertz Glacier, East Antarctica, and its temporal evolution |
title_sort |
multi-year/multi-decade ice about mertz glacier, east antarctica, and its temporal evolution |
publisher |
International Glaciological Society |
publishDate |
2014 |
url |
http://ecite.utas.edu.au/90788 |
long_lat |
ENVELOPE(144.500,144.500,-67.667,-67.667) ENVELOPE(145.500,145.500,-67.167,-67.167) |
geographic |
East Antarctica Mertz Glacier Mertz Glacier Tongue |
geographic_facet |
East Antarctica Mertz Glacier Mertz Glacier Tongue |
genre |
Antarc* Antarctica East Antarctica Mertz Glacier Sea ice |
genre_facet |
Antarc* Antarctica East Antarctica Mertz Glacier Sea ice |
op_relation |
Young, NW and Lieser, JL and Massom, RA and Fraser, Alexander Donald and Floricioiu, D, Multi-year/multi-decade ice about Mertz Glacier, East Antarctica, and its temporal evolution, International Symposium on Sea Ice in a Changing Environment - Proceedings of the Hobart Symposium, 10-14 March 2014, Hobart, Tasmania, Australia, pp. 69A881. (2014) [Conference Extract] http://ecite.utas.edu.au/90788 |
_version_ |
1766091186099978240 |