Sensitivity of isochrones to surface mass balance and dynamics
Abstract The interior of an ice sheet consists of layers of accumulated snow, which contain important information on accumulation and ice dynamics that are imprinted on layer shapes over time. This work describes how changes in accumulation influence the stratigraphy of an ice sheet. The thickness o...
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Cambridge University Press (CUP)
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Online Access: | http://dx.doi.org/10.1017/jog.2022.62 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143022000624 |
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crcambridgeupr:10.1017/jog.2022.62 2024-03-03T08:45:23+00:00 Sensitivity of isochrones to surface mass balance and dynamics Theofilopoulos, Alexios Born, Andreas Trond Mohn Foundation 2022 http://dx.doi.org/10.1017/jog.2022.62 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143022000624 en eng Cambridge University Press (CUP) https://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 69, issue 274, page 311-323 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2022 crcambridgeupr https://doi.org/10.1017/jog.2022.62 2024-02-08T08:44:53Z Abstract The interior of an ice sheet consists of layers of accumulated snow, which contain important information on accumulation and ice dynamics that are imprinted on layer shapes over time. This work describes how changes in accumulation influence the stratigraphy of an ice sheet. The thickness of each layer at present day depends both on accumulation and on the effect of dynamic thinning after its deposition. An isochronal numerical model is used to simulate the evolution of a 2-D, idealized ice sheet while explicitly representing the layers. A series of simulations was carried out to quantify the changes that anomalous accumulation at different locations and times has on the stratigraphy. These simulations form the basis of a linear response function. A second set of simulations with more sustained changes in accumulation is then used to describe large-scale and long-term impacts on the layering of the ice sheet as well as to test the quality of the linear approximation. The aim is to examine whether long-term effects can be extrapolated from small differential changes. The result confirms a certain degree of linearity between changes in accumulation and layer thickness that may be exploited for future inverse modeling applications. Article in Journal/Newspaper Ice Sheet Journal of Glaciology Cambridge University Press Journal of Glaciology 1 13 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Theofilopoulos, Alexios Born, Andreas Sensitivity of isochrones to surface mass balance and dynamics |
topic_facet |
Earth-Surface Processes |
description |
Abstract The interior of an ice sheet consists of layers of accumulated snow, which contain important information on accumulation and ice dynamics that are imprinted on layer shapes over time. This work describes how changes in accumulation influence the stratigraphy of an ice sheet. The thickness of each layer at present day depends both on accumulation and on the effect of dynamic thinning after its deposition. An isochronal numerical model is used to simulate the evolution of a 2-D, idealized ice sheet while explicitly representing the layers. A series of simulations was carried out to quantify the changes that anomalous accumulation at different locations and times has on the stratigraphy. These simulations form the basis of a linear response function. A second set of simulations with more sustained changes in accumulation is then used to describe large-scale and long-term impacts on the layering of the ice sheet as well as to test the quality of the linear approximation. The aim is to examine whether long-term effects can be extrapolated from small differential changes. The result confirms a certain degree of linearity between changes in accumulation and layer thickness that may be exploited for future inverse modeling applications. |
author2 |
Trond Mohn Foundation |
format |
Article in Journal/Newspaper |
author |
Theofilopoulos, Alexios Born, Andreas |
author_facet |
Theofilopoulos, Alexios Born, Andreas |
author_sort |
Theofilopoulos, Alexios |
title |
Sensitivity of isochrones to surface mass balance and dynamics |
title_short |
Sensitivity of isochrones to surface mass balance and dynamics |
title_full |
Sensitivity of isochrones to surface mass balance and dynamics |
title_fullStr |
Sensitivity of isochrones to surface mass balance and dynamics |
title_full_unstemmed |
Sensitivity of isochrones to surface mass balance and dynamics |
title_sort |
sensitivity of isochrones to surface mass balance and dynamics |
publisher |
Cambridge University Press (CUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1017/jog.2022.62 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143022000624 |
genre |
Ice Sheet Journal of Glaciology |
genre_facet |
Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 69, issue 274, page 311-323 ISSN 0022-1430 1727-5652 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2022.62 |
container_title |
Journal of Glaciology |
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1 |
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13 |
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1792500942931755008 |