GOCE’s view below the ice of Antarctica: Satellite gravimetry confirms improvements in Bedmap2 bedrock knowledge
Accurate knowledge of Antarctica's topography, bedrock, and ice sheet thickness is pivotal for climate change and geoscience research. Building on recent significant progress made in satellite gravity mapping with European Space Agency's Gravity field and Ocean Circulation Explorer (GOCE)...
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American Geophysical Union
2014
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Online Access: | https://hdl.handle.net/20.500.11937/45830 https://doi.org/10.1002/2014GL060636 |
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ftcurtin:oai:espace.curtin.edu.au:20.500.11937/45830 2023-06-11T04:05:00+02:00 GOCE’s view below the ice of Antarctica: Satellite gravimetry confirms improvements in Bedmap2 bedrock knowledge Hirt, Christian 2014 fulltext https://hdl.handle.net/20.500.11937/45830 https://doi.org/10.1002/2014GL060636 unknown American Geophysical Union http://hdl.handle.net/20.500.11937/45830 doi:10.1002/2014GL060636 bedrock GOCE topography satellite gravity gravity forward modeling Journal Article 2014 ftcurtin https://doi.org/20.500.11937/4583010.1002/2014GL060636 2023-05-30T19:44:18Z Accurate knowledge of Antarctica's topography, bedrock, and ice sheet thickness is pivotal for climate change and geoscience research. Building on recent significant progress made in satellite gravity mapping with European Space Agency's Gravity field and Ocean Circulation Explorer (GOCE) mission, we here reverse the widely used approach of validating satellite gravity with topography and instead utilize the new GOCE gravity maps for novel evaluation of Bedmap1/2. Space-collected GOCE gravity reveals clear improvements in the Bedmap2 ice and bedrock data over Bedmap1 via forward modeled topographic mass and gravity effects at spatial scales of 400 to 80 km. Our study demonstrates GOCE's sensitivity for the subsurface mass distribution in the lithosphere and delivers independent evidence for Bedmap2's improved quality, reflecting new radar-derived ice thickness data. GOCE and Bedmap2 are combined to produce improved Bouguer gravity maps over Antarctica. We recommend incorporation of Bedmap2 in future high-resolution global topography and geopotential models and its use for detailed geoid modeling over Antarctica. Article in Journal/Newspaper Antarc* Antarctica Ice Sheet Curtin University: espace Geophysical Research Letters 41 14 5021 5028 |
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Curtin University: espace |
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bedrock GOCE topography satellite gravity gravity forward modeling |
spellingShingle |
bedrock GOCE topography satellite gravity gravity forward modeling Hirt, Christian GOCE’s view below the ice of Antarctica: Satellite gravimetry confirms improvements in Bedmap2 bedrock knowledge |
topic_facet |
bedrock GOCE topography satellite gravity gravity forward modeling |
description |
Accurate knowledge of Antarctica's topography, bedrock, and ice sheet thickness is pivotal for climate change and geoscience research. Building on recent significant progress made in satellite gravity mapping with European Space Agency's Gravity field and Ocean Circulation Explorer (GOCE) mission, we here reverse the widely used approach of validating satellite gravity with topography and instead utilize the new GOCE gravity maps for novel evaluation of Bedmap1/2. Space-collected GOCE gravity reveals clear improvements in the Bedmap2 ice and bedrock data over Bedmap1 via forward modeled topographic mass and gravity effects at spatial scales of 400 to 80 km. Our study demonstrates GOCE's sensitivity for the subsurface mass distribution in the lithosphere and delivers independent evidence for Bedmap2's improved quality, reflecting new radar-derived ice thickness data. GOCE and Bedmap2 are combined to produce improved Bouguer gravity maps over Antarctica. We recommend incorporation of Bedmap2 in future high-resolution global topography and geopotential models and its use for detailed geoid modeling over Antarctica. |
format |
Article in Journal/Newspaper |
author |
Hirt, Christian |
author_facet |
Hirt, Christian |
author_sort |
Hirt, Christian |
title |
GOCE’s view below the ice of Antarctica: Satellite gravimetry confirms improvements in Bedmap2 bedrock knowledge |
title_short |
GOCE’s view below the ice of Antarctica: Satellite gravimetry confirms improvements in Bedmap2 bedrock knowledge |
title_full |
GOCE’s view below the ice of Antarctica: Satellite gravimetry confirms improvements in Bedmap2 bedrock knowledge |
title_fullStr |
GOCE’s view below the ice of Antarctica: Satellite gravimetry confirms improvements in Bedmap2 bedrock knowledge |
title_full_unstemmed |
GOCE’s view below the ice of Antarctica: Satellite gravimetry confirms improvements in Bedmap2 bedrock knowledge |
title_sort |
goce’s view below the ice of antarctica: satellite gravimetry confirms improvements in bedmap2 bedrock knowledge |
publisher |
American Geophysical Union |
publishDate |
2014 |
url |
https://hdl.handle.net/20.500.11937/45830 https://doi.org/10.1002/2014GL060636 |
genre |
Antarc* Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctica Ice Sheet |
op_relation |
http://hdl.handle.net/20.500.11937/45830 doi:10.1002/2014GL060636 |
op_doi |
https://doi.org/20.500.11937/4583010.1002/2014GL060636 |
container_title |
Geophysical Research Letters |
container_volume |
41 |
container_issue |
14 |
container_start_page |
5021 |
op_container_end_page |
5028 |
_version_ |
1768392752393879552 |