Ice discharge error estimates using different cross-sectional area approaches: a case study for the Canadian High Arctic, 2016/17
We analyse the various error sources in the estimation of ice discharge through flux gates, distinguishing the cases with ice-thickness data available for glacier cross-sections or only along the centreline. For the latter, we analyse the performance of three U-shaped cross-sectional approaches. We...
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ftunivpmadrid:oai:oa.upm.es:54791 2023-05-15T14:26:41+02:00 Ice discharge error estimates using different cross-sectional area approaches: a case study for the Canadian High Arctic, 2016/17 Sánchez-Gámez, Pablo Navarro Valero, Francisco José 2018-08 application/pdf https://oa.upm.es/54791/ eng eng E.T.S.I. Telecomunicación (UPM) https://www.cambridge.org/core/journals/journal-of-glaciology/article/ice-discharge-error-estimates-using-different-crosssectional-area-approaches-a-case-study-for-the-canadian-high-arctic-201617/6CF435306A0E0EC805B32F5D1C5597DC info:eu-repo/grantAgreement/EC/H2020/727890 info:eu-repo/grantAgreement/MINECO//CTM2014-56473-R info:eu-repo/semantics/altIdentifier/doi/10.1017/jog.2018.48 https://oa.upm.es/54791/ https://creativecommons.org/licenses/by-nc-nd/3.0/es/ info:eu-repo/semantics/openAccess CC-BY-NC-ND Journal of Glaciology, ISSN 0022-1430, 2018-08, Vol. 64, No. 246 Matemáticas Telecomunicaciones info:eu-repo/semantics/article Artículo PeerReviewed 2018 ftunivpmadrid https://doi.org/10.1017/jog.2018.48 2022-06-06T18:23:54Z We analyse the various error sources in the estimation of ice discharge through flux gates, distinguishing the cases with ice-thickness data available for glacier cross-sections or only along the centreline. For the latter, we analyse the performance of three U-shaped cross-sectional approaches. We apply this methodology to glaciers of the Canadian High Arctic. The velocity field is the main error source for small and medium-size glaciers (discharge 100 Mt a−1 ) with high velocities (>100 m a−1 ) the error in crosssectional area dominates. Thinning/thickening between ice-thickness and velocity measurements should be considered, as it implies systematic errors up to 8% in our study. The U-shaped parabolic approach, which allows for an adjusted estimation when the ice-thickness measurement point is displaced from the glacier centreline, performs best, with small bias and admissible standard error. We observe an increase of ice discharge from the main glaciers (Trinity and Wykeham) of the Prince of Wales Icefield from 2015 to 2016, by 5 and 20%, respectively, followed by a decrease in 2017, by 10 and 15%, respectively. Belcher Glacier, of the Devon Ice Cap, maintains similar discharges during 2015–17. Article in Journal/Newspaper Arctic Arctic Ice cap Journal of Glaciology Archivo Digital UPM (Universidad Politécnica de Madrid) Arctic Belcher ENVELOPE(-94.172,-94.172,57.936,57.936) Belcher Glacier ENVELOPE(-81.354,-81.354,75.682,75.682) Devon Ice Cap ENVELOPE(-82.499,-82.499,75.335,75.335) Prince of Wales Icefield ENVELOPE(-78.998,-78.998,78.252,78.252) Journal of Glaciology 64 246 595 608 |
institution |
Open Polar |
collection |
Archivo Digital UPM (Universidad Politécnica de Madrid) |
op_collection_id |
ftunivpmadrid |
language |
English |
topic |
Matemáticas Telecomunicaciones |
spellingShingle |
Matemáticas Telecomunicaciones Sánchez-Gámez, Pablo Navarro Valero, Francisco José Ice discharge error estimates using different cross-sectional area approaches: a case study for the Canadian High Arctic, 2016/17 |
topic_facet |
Matemáticas Telecomunicaciones |
description |
We analyse the various error sources in the estimation of ice discharge through flux gates, distinguishing the cases with ice-thickness data available for glacier cross-sections or only along the centreline. For the latter, we analyse the performance of three U-shaped cross-sectional approaches. We apply this methodology to glaciers of the Canadian High Arctic. The velocity field is the main error source for small and medium-size glaciers (discharge 100 Mt a−1 ) with high velocities (>100 m a−1 ) the error in crosssectional area dominates. Thinning/thickening between ice-thickness and velocity measurements should be considered, as it implies systematic errors up to 8% in our study. The U-shaped parabolic approach, which allows for an adjusted estimation when the ice-thickness measurement point is displaced from the glacier centreline, performs best, with small bias and admissible standard error. We observe an increase of ice discharge from the main glaciers (Trinity and Wykeham) of the Prince of Wales Icefield from 2015 to 2016, by 5 and 20%, respectively, followed by a decrease in 2017, by 10 and 15%, respectively. Belcher Glacier, of the Devon Ice Cap, maintains similar discharges during 2015–17. |
format |
Article in Journal/Newspaper |
author |
Sánchez-Gámez, Pablo Navarro Valero, Francisco José |
author_facet |
Sánchez-Gámez, Pablo Navarro Valero, Francisco José |
author_sort |
Sánchez-Gámez, Pablo |
title |
Ice discharge error estimates using different cross-sectional area approaches: a case study for the Canadian High Arctic, 2016/17 |
title_short |
Ice discharge error estimates using different cross-sectional area approaches: a case study for the Canadian High Arctic, 2016/17 |
title_full |
Ice discharge error estimates using different cross-sectional area approaches: a case study for the Canadian High Arctic, 2016/17 |
title_fullStr |
Ice discharge error estimates using different cross-sectional area approaches: a case study for the Canadian High Arctic, 2016/17 |
title_full_unstemmed |
Ice discharge error estimates using different cross-sectional area approaches: a case study for the Canadian High Arctic, 2016/17 |
title_sort |
ice discharge error estimates using different cross-sectional area approaches: a case study for the canadian high arctic, 2016/17 |
publisher |
E.T.S.I. Telecomunicación (UPM) |
publishDate |
2018 |
url |
https://oa.upm.es/54791/ |
long_lat |
ENVELOPE(-94.172,-94.172,57.936,57.936) ENVELOPE(-81.354,-81.354,75.682,75.682) ENVELOPE(-82.499,-82.499,75.335,75.335) ENVELOPE(-78.998,-78.998,78.252,78.252) |
geographic |
Arctic Belcher Belcher Glacier Devon Ice Cap Prince of Wales Icefield |
geographic_facet |
Arctic Belcher Belcher Glacier Devon Ice Cap Prince of Wales Icefield |
genre |
Arctic Arctic Ice cap Journal of Glaciology |
genre_facet |
Arctic Arctic Ice cap Journal of Glaciology |
op_source |
Journal of Glaciology, ISSN 0022-1430, 2018-08, Vol. 64, No. 246 |
op_relation |
https://www.cambridge.org/core/journals/journal-of-glaciology/article/ice-discharge-error-estimates-using-different-crosssectional-area-approaches-a-case-study-for-the-canadian-high-arctic-201617/6CF435306A0E0EC805B32F5D1C5597DC info:eu-repo/grantAgreement/EC/H2020/727890 info:eu-repo/grantAgreement/MINECO//CTM2014-56473-R info:eu-repo/semantics/altIdentifier/doi/10.1017/jog.2018.48 https://oa.upm.es/54791/ |
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/10.1017/jog.2018.48 |
container_title |
Journal of Glaciology |
container_volume |
64 |
container_issue |
246 |
container_start_page |
595 |
op_container_end_page |
608 |
_version_ |
1766299961427755008 |