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Ice-shelf grounding zones link the Antarctic ice-sheets to the ocean. Differential interferometric synthetic aperture radar (DInSAR) is commonly used to monitor grounding-line locations, but also contains information on grounding-zone ice thickness, ice properties and tidal conditions beneath the ic...
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ftfrontimediafig:oai:figshare.com:article/6120194 2023-05-15T13:50:10+02:00 Image3.PDF Christian T. Wild Oliver J. Marsh Wolfgang Rack 2018-04-10T06:56:34Z https://doi.org/10.3389/feart.2018.00028.s003 https://figshare.com/articles/Image3_PDF/6120194 unknown doi:10.3389/feart.2018.00028.s003 https://figshare.com/articles/Image3_PDF/6120194 CC BY 4.0 CC-BY Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change grounding line ice-shelf flexure viscoelastic bending 2-D finite element model McMurdo Ice Shelf TerraSAR-X CryoSat-2 interferometric SAR Image Figure 2018 ftfrontimediafig https://doi.org/10.3389/feart.2018.00028.s003 2018-04-11T22:57:02Z Ice-shelf grounding zones link the Antarctic ice-sheets to the ocean. Differential interferometric synthetic aperture radar (DInSAR) is commonly used to monitor grounding-line locations, but also contains information on grounding-zone ice thickness, ice properties and tidal conditions beneath the ice shelf. Here, we combine in-situ data with numerical modeling of ice-shelf flexure to investigate 2-D controls on the tidal bending pattern on the Southern McMurdo Ice Shelf. We validate our results with 9 double-differential TerraSAR-X interferograms. It is necessary to make adjustments to the tidal forcing to directly compare observations with model output and we find that when these adjustments are small (<1.5 cm) a viscoelastic model matches better, while an elastic model is more robust overall. Within landward embayments, where lateral stresses from surrounding protrusions damp the flexural response, a 2-D model captures behavior that is missed in simple 1-D models. We conclude that improvements in current tide models are required to allow for the full exploitation of DInSAR in grounding-zone glaciology. Still Image Antarc* Antarctic Ice Shelf McMurdo Ice Shelf Frontiers: Figshare Antarctic McMurdo Ice Shelf ENVELOPE(166.500,166.500,-78.000,-78.000) The Antarctic |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change grounding line ice-shelf flexure viscoelastic bending 2-D finite element model McMurdo Ice Shelf TerraSAR-X CryoSat-2 interferometric SAR |
spellingShingle |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change grounding line ice-shelf flexure viscoelastic bending 2-D finite element model McMurdo Ice Shelf TerraSAR-X CryoSat-2 interferometric SAR Christian T. Wild Oliver J. Marsh Wolfgang Rack Image3.PDF |
topic_facet |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change grounding line ice-shelf flexure viscoelastic bending 2-D finite element model McMurdo Ice Shelf TerraSAR-X CryoSat-2 interferometric SAR |
description |
Ice-shelf grounding zones link the Antarctic ice-sheets to the ocean. Differential interferometric synthetic aperture radar (DInSAR) is commonly used to monitor grounding-line locations, but also contains information on grounding-zone ice thickness, ice properties and tidal conditions beneath the ice shelf. Here, we combine in-situ data with numerical modeling of ice-shelf flexure to investigate 2-D controls on the tidal bending pattern on the Southern McMurdo Ice Shelf. We validate our results with 9 double-differential TerraSAR-X interferograms. It is necessary to make adjustments to the tidal forcing to directly compare observations with model output and we find that when these adjustments are small (<1.5 cm) a viscoelastic model matches better, while an elastic model is more robust overall. Within landward embayments, where lateral stresses from surrounding protrusions damp the flexural response, a 2-D model captures behavior that is missed in simple 1-D models. We conclude that improvements in current tide models are required to allow for the full exploitation of DInSAR in grounding-zone glaciology. |
format |
Still Image |
author |
Christian T. Wild Oliver J. Marsh Wolfgang Rack |
author_facet |
Christian T. Wild Oliver J. Marsh Wolfgang Rack |
author_sort |
Christian T. Wild |
title |
Image3.PDF |
title_short |
Image3.PDF |
title_full |
Image3.PDF |
title_fullStr |
Image3.PDF |
title_full_unstemmed |
Image3.PDF |
title_sort |
image3.pdf |
publishDate |
2018 |
url |
https://doi.org/10.3389/feart.2018.00028.s003 https://figshare.com/articles/Image3_PDF/6120194 |
long_lat |
ENVELOPE(166.500,166.500,-78.000,-78.000) |
geographic |
Antarctic McMurdo Ice Shelf The Antarctic |
geographic_facet |
Antarctic McMurdo Ice Shelf The Antarctic |
genre |
Antarc* Antarctic Ice Shelf McMurdo Ice Shelf |
genre_facet |
Antarc* Antarctic Ice Shelf McMurdo Ice Shelf |
op_relation |
doi:10.3389/feart.2018.00028.s003 https://figshare.com/articles/Image3_PDF/6120194 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/feart.2018.00028.s003 |
_version_ |
1766253165738459136 |