Modeling and numerical sensitivity study on the conjecture of a subglacial lake at Amundsenisen, Svalbard
We present a new numerical procedure to assess the plausibility of a subglacial lake in case of relative small/moderate extension and surging temperate icefield. In addition to the flat signal from Ground Penetrating Radar remote survey of the area, early indication of a likely subglacial lake, requ...
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ftunivpmadrid:oai:oa.upm.es:41253 2023-05-15T18:29:45+02:00 Modeling and numerical sensitivity study on the conjecture of a subglacial lake at Amundsenisen, Svalbard Mansutti, Daniela Bucchignani, Edoardo Otero García, Jaime Glowacki, Piotr 2015-08 application/pdf https://oa.upm.es/41253/ eng eng E.T.S.I. Telecomunicación (UPM) http://www.sciencedirect.com/science/article/pii/S0307904X14007185 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apm.2014.12.043 https://oa.upm.es/41253/ https://creativecommons.org/licenses/by-nc-nd/3.0/es/ info:eu-repo/semantics/openAccess CC-BY-NC-ND Applied Mathematical Modelling, ISSN 0307-904X, 2015-08, Vol. 39, No. 15 Matemáticas Telecomunicaciones info:eu-repo/semantics/article Artículo PeerReviewed 2015 ftunivpmadrid https://doi.org/10.1016/j.apm.2014.12.043 2022-06-06T18:19:28Z We present a new numerical procedure to assess the plausibility of a subglacial lake in case of relative small/moderate extension and surging temperate icefield. In addition to the flat signal from Ground Penetrating Radar remote survey of the area, early indication of a likely subglacial lake, required icefield data are: top surface elevation and bathymetry, top surface velocity at some points, in-depth temperature and density profiles of upper layer. The procedure is based on a mathematical model of the evolution of dynamics and thermo-dynamics of the icefield and of a subglacial lake. The Glen’s law is adopted for ice rheology and Stokes reduction is applied; Large Eddy Simulation technique is used for the lake. Ice/water phase change is described. Finite volumes for model discretization and a front-tracking technique to follow the moving interface characterize the numerical method. We have applied this procedure to the case of a subglacial lake conjectured in the area of Amundsenisen, Svalbard, and, here, the results of a sensitivity study are discussed. In particular we point out that the effect of firn and snow upper layers on the system, in terms of temperature field, density and water content, has to be included in the modeling, as it contributes to the overcoming of the ice metastable state and the release of subglacial water. Accordingly, ice water content changes have to be carefully described. The depth of the bed depression is confirmed to be critical for the formation of the lake. Article in Journal/Newspaper Svalbard Archivo Digital UPM (Universidad Politécnica de Madrid) Amundsenisen ENVELOPE(15.571,15.571,77.286,77.286) Svalbard Applied Mathematical Modelling 39 15 4266 4284 |
institution |
Open Polar |
collection |
Archivo Digital UPM (Universidad Politécnica de Madrid) |
op_collection_id |
ftunivpmadrid |
language |
English |
topic |
Matemáticas Telecomunicaciones |
spellingShingle |
Matemáticas Telecomunicaciones Mansutti, Daniela Bucchignani, Edoardo Otero García, Jaime Glowacki, Piotr Modeling and numerical sensitivity study on the conjecture of a subglacial lake at Amundsenisen, Svalbard |
topic_facet |
Matemáticas Telecomunicaciones |
description |
We present a new numerical procedure to assess the plausibility of a subglacial lake in case of relative small/moderate extension and surging temperate icefield. In addition to the flat signal from Ground Penetrating Radar remote survey of the area, early indication of a likely subglacial lake, required icefield data are: top surface elevation and bathymetry, top surface velocity at some points, in-depth temperature and density profiles of upper layer. The procedure is based on a mathematical model of the evolution of dynamics and thermo-dynamics of the icefield and of a subglacial lake. The Glen’s law is adopted for ice rheology and Stokes reduction is applied; Large Eddy Simulation technique is used for the lake. Ice/water phase change is described. Finite volumes for model discretization and a front-tracking technique to follow the moving interface characterize the numerical method. We have applied this procedure to the case of a subglacial lake conjectured in the area of Amundsenisen, Svalbard, and, here, the results of a sensitivity study are discussed. In particular we point out that the effect of firn and snow upper layers on the system, in terms of temperature field, density and water content, has to be included in the modeling, as it contributes to the overcoming of the ice metastable state and the release of subglacial water. Accordingly, ice water content changes have to be carefully described. The depth of the bed depression is confirmed to be critical for the formation of the lake. |
format |
Article in Journal/Newspaper |
author |
Mansutti, Daniela Bucchignani, Edoardo Otero García, Jaime Glowacki, Piotr |
author_facet |
Mansutti, Daniela Bucchignani, Edoardo Otero García, Jaime Glowacki, Piotr |
author_sort |
Mansutti, Daniela |
title |
Modeling and numerical sensitivity study on the conjecture of a subglacial lake at Amundsenisen, Svalbard |
title_short |
Modeling and numerical sensitivity study on the conjecture of a subglacial lake at Amundsenisen, Svalbard |
title_full |
Modeling and numerical sensitivity study on the conjecture of a subglacial lake at Amundsenisen, Svalbard |
title_fullStr |
Modeling and numerical sensitivity study on the conjecture of a subglacial lake at Amundsenisen, Svalbard |
title_full_unstemmed |
Modeling and numerical sensitivity study on the conjecture of a subglacial lake at Amundsenisen, Svalbard |
title_sort |
modeling and numerical sensitivity study on the conjecture of a subglacial lake at amundsenisen, svalbard |
publisher |
E.T.S.I. Telecomunicación (UPM) |
publishDate |
2015 |
url |
https://oa.upm.es/41253/ |
long_lat |
ENVELOPE(15.571,15.571,77.286,77.286) |
geographic |
Amundsenisen Svalbard |
geographic_facet |
Amundsenisen Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_source |
Applied Mathematical Modelling, ISSN 0307-904X, 2015-08, Vol. 39, No. 15 |
op_relation |
http://www.sciencedirect.com/science/article/pii/S0307904X14007185 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apm.2014.12.043 https://oa.upm.es/41253/ |
op_rights |
https://creativecommons.org/licenses/by-nc-nd/3.0/es/ info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.apm.2014.12.043 |
container_title |
Applied Mathematical Modelling |
container_volume |
39 |
container_issue |
15 |
container_start_page |
4266 |
op_container_end_page |
4284 |
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1766213099721850880 |