Sensitivity of isochrones to surface mass balance and dynamics
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 la...
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Online Access: | https://hdl.handle.net/11250/3145228 https://doi.org/10.1017/jog.2022.62 |
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ftunivbergen:oai:bora.uib.no:11250/3145228 2024-09-15T18:12:12+00:00 Sensitivity of isochrones to surface mass balance and dynamics Theofilopoulos, Alexios Born, Andreas 2023 application/pdf https://hdl.handle.net/11250/3145228 https://doi.org/10.1017/jog.2022.62 eng eng Cambridge University Press urn:issn:0022-1430 https://hdl.handle.net/11250/3145228 https://doi.org/10.1017/jog.2022.62 cristin:2139053 Journal of Glaciology. 2023, 69 (274), 311-323. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2022 The Author(s) Journal of Glaciology 311-323 69 274 Journal article Peer reviewed 2023 ftunivbergen https://doi.org/10.1017/jog.2022.62 2024-08-13T23:41:38Z 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. publishedVersion Article in Journal/Newspaper Ice Sheet Journal of Glaciology University of Bergen: Bergen Open Research Archive (BORA-UiB) Journal of Glaciology 69 274 311 323 |
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Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
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ftunivbergen |
language |
English |
description |
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. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Theofilopoulos, Alexios Born, Andreas |
spellingShingle |
Theofilopoulos, Alexios Born, Andreas Sensitivity of isochrones to surface mass balance and dynamics |
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 |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3145228 https://doi.org/10.1017/jog.2022.62 |
genre |
Ice Sheet Journal of Glaciology |
genre_facet |
Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology 311-323 69 274 |
op_relation |
urn:issn:0022-1430 https://hdl.handle.net/11250/3145228 https://doi.org/10.1017/jog.2022.62 cristin:2139053 Journal of Glaciology. 2023, 69 (274), 311-323. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2022 The Author(s) |
op_doi |
https://doi.org/10.1017/jog.2022.62 |
container_title |
Journal of Glaciology |
container_volume |
69 |
container_issue |
274 |
container_start_page |
311 |
op_container_end_page |
323 |
_version_ |
1810449781431992320 |