Mapping the grounding zone of the Ross Ice Shelf, Antarctica, using ICESat laser altimetry
ABSTRACT. We use laser altimetry from the Ice, Cloud, and land Elevation Satellite (ICESat) to map the grounding zone (GZ) of the Ross Ice Shelf, Antarctica, at 491 locations where ICESat tracks cross the grounding line (GL). Ice flexure in the GZ occurs as the ice shelf responds to short-term sea-l...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.634.8094 2023-05-15T13:37:45+02:00 Mapping the grounding zone of the Ross Ice Shelf, Antarctica, using ICESat laser altimetry The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.8094 http://www.igsoc.org/annals/51/55/a55a044.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.8094 http://www.igsoc.org/annals/51/55/a55a044.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.igsoc.org/annals/51/55/a55a044.pdf text ftciteseerx 2016-01-08T15:39:10Z ABSTRACT. We use laser altimetry from the Ice, Cloud, and land Elevation Satellite (ICESat) to map the grounding zone (GZ) of the Ross Ice Shelf, Antarctica, at 491 locations where ICESat tracks cross the grounding line (GL). Ice flexure in the GZ occurs as the ice shelf responds to short-term sea-level changes due primarily to tides. ICESat repeat-track analysis can be used to detect this region of flexure since each repeated pass is acquired at a different tidal phase; the technique provides estimates for both the landward limit of flexure and the point where the ice becomes hydrostatically balanced. We find that the ICESat-derived landward limits of tidal flexure are, in many places, offset by several km (and up to 60 km) from the GL mapped previously using other satellite methods. We discuss the reasons why different mapping methods lead to different GL estimates, including: instrument limitations; variability in the surface topographic structure of the GZ; and the presence of ice plains. We conclude that reliable and accurate mapping of the GL is most likely to be achieved when based on synthesis of several satellite datasets. Text Antarc* Antarctica Ice Shelf Ross Ice Shelf Unknown Ross Ice Shelf |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
ABSTRACT. We use laser altimetry from the Ice, Cloud, and land Elevation Satellite (ICESat) to map the grounding zone (GZ) of the Ross Ice Shelf, Antarctica, at 491 locations where ICESat tracks cross the grounding line (GL). Ice flexure in the GZ occurs as the ice shelf responds to short-term sea-level changes due primarily to tides. ICESat repeat-track analysis can be used to detect this region of flexure since each repeated pass is acquired at a different tidal phase; the technique provides estimates for both the landward limit of flexure and the point where the ice becomes hydrostatically balanced. We find that the ICESat-derived landward limits of tidal flexure are, in many places, offset by several km (and up to 60 km) from the GL mapped previously using other satellite methods. We discuss the reasons why different mapping methods lead to different GL estimates, including: instrument limitations; variability in the surface topographic structure of the GZ; and the presence of ice plains. We conclude that reliable and accurate mapping of the GL is most likely to be achieved when based on synthesis of several satellite datasets. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
title |
Mapping the grounding zone of the Ross Ice Shelf, Antarctica, using ICESat laser altimetry |
spellingShingle |
Mapping the grounding zone of the Ross Ice Shelf, Antarctica, using ICESat laser altimetry |
title_short |
Mapping the grounding zone of the Ross Ice Shelf, Antarctica, using ICESat laser altimetry |
title_full |
Mapping the grounding zone of the Ross Ice Shelf, Antarctica, using ICESat laser altimetry |
title_fullStr |
Mapping the grounding zone of the Ross Ice Shelf, Antarctica, using ICESat laser altimetry |
title_full_unstemmed |
Mapping the grounding zone of the Ross Ice Shelf, Antarctica, using ICESat laser altimetry |
title_sort |
mapping the grounding zone of the ross ice shelf, antarctica, using icesat laser altimetry |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.8094 http://www.igsoc.org/annals/51/55/a55a044.pdf |
geographic |
Ross Ice Shelf |
geographic_facet |
Ross Ice Shelf |
genre |
Antarc* Antarctica Ice Shelf Ross Ice Shelf |
genre_facet |
Antarc* Antarctica Ice Shelf Ross Ice Shelf |
op_source |
http://www.igsoc.org/annals/51/55/a55a044.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.8094 http://www.igsoc.org/annals/51/55/a55a044.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766097287041253376 |