Mantle Viscosity and Ice-Age Ice Sheet Topography
Ice-age paleotopography and mantle viscosity can both be inferred from observations of Earth's response to the most recent deglaciation event of the current ice age. This procedure requires iterative application of a theoretical model of the global process of glacial isostatic adjustment. Resul...
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1996
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Online Access: | http://dx.doi.org/10.1126/science.273.5280.1359 https://www.science.org/doi/pdf/10.1126/science.273.5280.1359 |
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craaas:10.1126/science.273.5280.1359 2024-04-28T08:24:54+00:00 Mantle Viscosity and Ice-Age Ice Sheet Topography Peltier, W. Richard 1996 http://dx.doi.org/10.1126/science.273.5280.1359 https://www.science.org/doi/pdf/10.1126/science.273.5280.1359 en eng American Association for the Advancement of Science (AAAS) Science volume 273, issue 5280, page 1359-1364 ISSN 0036-8075 1095-9203 Multidisciplinary journal-article 1996 craaas https://doi.org/10.1126/science.273.5280.1359 2024-04-09T06:40:50Z Ice-age paleotopography and mantle viscosity can both be inferred from observations of Earth's response to the most recent deglaciation event of the current ice age. This procedure requires iterative application of a theoretical model of the global process of glacial isostatic adjustment. Results demonstrate that the iterative inversion procedure converges to a paleotopography that is extremely close to that from the ICE-4G model. The accompanying mantle viscosity profile is furthermore shown to reconcile the requirements of aspherical geoid anomalies related to the mantle convection process, thus resolving a fundamental issue concerning mantle rheology. The combined model also explains postglacial sea level histories for the east coast of the United States. Article in Journal/Newspaper Ice Sheet AAAS Resource Center (American Association for the Advancement of Science) Science 273 5280 1359 1364 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
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craaas |
language |
English |
topic |
Multidisciplinary |
spellingShingle |
Multidisciplinary Peltier, W. Richard Mantle Viscosity and Ice-Age Ice Sheet Topography |
topic_facet |
Multidisciplinary |
description |
Ice-age paleotopography and mantle viscosity can both be inferred from observations of Earth's response to the most recent deglaciation event of the current ice age. This procedure requires iterative application of a theoretical model of the global process of glacial isostatic adjustment. Results demonstrate that the iterative inversion procedure converges to a paleotopography that is extremely close to that from the ICE-4G model. The accompanying mantle viscosity profile is furthermore shown to reconcile the requirements of aspherical geoid anomalies related to the mantle convection process, thus resolving a fundamental issue concerning mantle rheology. The combined model also explains postglacial sea level histories for the east coast of the United States. |
format |
Article in Journal/Newspaper |
author |
Peltier, W. Richard |
author_facet |
Peltier, W. Richard |
author_sort |
Peltier, W. Richard |
title |
Mantle Viscosity and Ice-Age Ice Sheet Topography |
title_short |
Mantle Viscosity and Ice-Age Ice Sheet Topography |
title_full |
Mantle Viscosity and Ice-Age Ice Sheet Topography |
title_fullStr |
Mantle Viscosity and Ice-Age Ice Sheet Topography |
title_full_unstemmed |
Mantle Viscosity and Ice-Age Ice Sheet Topography |
title_sort |
mantle viscosity and ice-age ice sheet topography |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1996 |
url |
http://dx.doi.org/10.1126/science.273.5280.1359 https://www.science.org/doi/pdf/10.1126/science.273.5280.1359 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Science volume 273, issue 5280, page 1359-1364 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.273.5280.1359 |
container_title |
Science |
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273 |
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5280 |
container_start_page |
1359 |
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1364 |
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1797584905438232576 |