Reconstructing spatially variable mass balances from past ice extents by inverse modeling
ABSTRACT With the conclusion of the Last Glacial Maximum (LGM), about 20 000 years ago, ended the most recent long-lasting cold phase in Earth history. This last glacial advance left a strong observable imprint on the landscape, such as moraines, trimlines and other glacial geomorphic features. Thes...
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crcambridgeupr:10.1017/jog.2018.82 2024-03-03T08:46:00+00:00 Reconstructing spatially variable mass balances from past ice extents by inverse modeling VIŠNJEVIĆ, VJERAN HERMAN, FRÉDÉRIC PODLADCHIKOV, YURY 2018 http://dx.doi.org/10.1017/jog.2018.82 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000825 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 64, issue 248, page 957-968 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2018 crcambridgeupr https://doi.org/10.1017/jog.2018.82 2024-02-08T08:43:51Z ABSTRACT With the conclusion of the Last Glacial Maximum (LGM), about 20 000 years ago, ended the most recent long-lasting cold phase in Earth history. This last glacial advance left a strong observable imprint on the landscape, such as moraines, trimlines and other glacial geomorphic features. These features reflect the extent of former glaciers and ice caps, which in turn provides information on past temperature and precipitation conditions. Here we present an inverse approach to reconstruct the equilibrium line altitudes ( E ) from observed ice extents. The ice-flow model is developed solving the mass conservation equation using the shallow ice approximation and implemented using Graphical Processing Units (GPUs). We present the theoretical basis of the inversion method, which relies on a Tikhonov regularization, and demonstrate its ability to constrain spatial variations in mass balance with idealized and real glaciers. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 64 248 957 968 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes VIŠNJEVIĆ, VJERAN HERMAN, FRÉDÉRIC PODLADCHIKOV, YURY Reconstructing spatially variable mass balances from past ice extents by inverse modeling |
topic_facet |
Earth-Surface Processes |
description |
ABSTRACT With the conclusion of the Last Glacial Maximum (LGM), about 20 000 years ago, ended the most recent long-lasting cold phase in Earth history. This last glacial advance left a strong observable imprint on the landscape, such as moraines, trimlines and other glacial geomorphic features. These features reflect the extent of former glaciers and ice caps, which in turn provides information on past temperature and precipitation conditions. Here we present an inverse approach to reconstruct the equilibrium line altitudes ( E ) from observed ice extents. The ice-flow model is developed solving the mass conservation equation using the shallow ice approximation and implemented using Graphical Processing Units (GPUs). We present the theoretical basis of the inversion method, which relies on a Tikhonov regularization, and demonstrate its ability to constrain spatial variations in mass balance with idealized and real glaciers. |
format |
Article in Journal/Newspaper |
author |
VIŠNJEVIĆ, VJERAN HERMAN, FRÉDÉRIC PODLADCHIKOV, YURY |
author_facet |
VIŠNJEVIĆ, VJERAN HERMAN, FRÉDÉRIC PODLADCHIKOV, YURY |
author_sort |
VIŠNJEVIĆ, VJERAN |
title |
Reconstructing spatially variable mass balances from past ice extents by inverse modeling |
title_short |
Reconstructing spatially variable mass balances from past ice extents by inverse modeling |
title_full |
Reconstructing spatially variable mass balances from past ice extents by inverse modeling |
title_fullStr |
Reconstructing spatially variable mass balances from past ice extents by inverse modeling |
title_full_unstemmed |
Reconstructing spatially variable mass balances from past ice extents by inverse modeling |
title_sort |
reconstructing spatially variable mass balances from past ice extents by inverse modeling |
publisher |
Cambridge University Press (CUP) |
publishDate |
2018 |
url |
http://dx.doi.org/10.1017/jog.2018.82 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000825 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 64, issue 248, page 957-968 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2018.82 |
container_title |
Journal of Glaciology |
container_volume |
64 |
container_issue |
248 |
container_start_page |
957 |
op_container_end_page |
968 |
_version_ |
1792501781967667200 |