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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Cambridge University Press
2023
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Online Access: | https://doi.org/10.1017/jog.2022.62 https://doaj.org/article/c26b8005334f494cab2c09878d86f4f4 |
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ftdoajarticles:oai:doaj.org/article:c26b8005334f494cab2c09878d86f4f4 2023-05-15T16:39:52+02:00 Sensitivity of isochrones to surface mass balance and dynamics Alexios Theofilopoulos Andreas Born 2023-04-01T00:00:00Z https://doi.org/10.1017/jog.2022.62 https://doaj.org/article/c26b8005334f494cab2c09878d86f4f4 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143022000624/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.62 0022-1430 1727-5652 https://doaj.org/article/c26b8005334f494cab2c09878d86f4f4 Journal of Glaciology, Vol 69, Pp 311-323 (2023) Accumulation ice dynamics ice-sheet modeling paleoclimate Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2023 ftdoajarticles https://doi.org/10.1017/jog.2022.62 2023-03-19T01:31:51Z 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 Directory of Open Access Journals: DOAJ Articles Journal of Glaciology 69 274 311 323 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Accumulation ice dynamics ice-sheet modeling paleoclimate Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Accumulation ice dynamics ice-sheet modeling paleoclimate Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Alexios Theofilopoulos Andreas Born Sensitivity of isochrones to surface mass balance and dynamics |
topic_facet |
Accumulation ice dynamics ice-sheet modeling paleoclimate Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
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. |
format |
Article in Journal/Newspaper |
author |
Alexios Theofilopoulos Andreas Born |
author_facet |
Alexios Theofilopoulos Andreas Born |
author_sort |
Alexios Theofilopoulos |
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://doi.org/10.1017/jog.2022.62 https://doaj.org/article/c26b8005334f494cab2c09878d86f4f4 |
genre |
Ice Sheet Journal of Glaciology |
genre_facet |
Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 69, Pp 311-323 (2023) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143022000624/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.62 0022-1430 1727-5652 https://doaj.org/article/c26b8005334f494cab2c09878d86f4f4 |
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_ |
1766030210813132800 |