Understanding the relative importance of vertical and horizontal flow in ice-wedge polygons
Ice-wedge polygons are common Arctic landforms. The future of these landforms in a warming climate depends on the bidirectional feedback between the rate of ice-wedge degradation and changes in hydrological characteristics. This work aims to better understand the relative roles of vertical and horiz...
Published in: | Hydrology and Earth System Sciences |
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Copernicus Publications
2020
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00054015 2023-05-15T15:09:55+02:00 Understanding the relative importance of vertical and horizontal flow in ice-wedge polygons Wales, Nathan A. Gomez-Velez, Jesus D. Newman, Brent D. Wilson, Cathy J. Dafflon, Baptiste Kneafsey, Timothy J. Soom, Florian Wullschleger, Stan D. 2020-03 electronic https://doi.org/10.5194/hess-24-1109-2020 https://noa.gwlb.de/receive/cop_mods_00054015 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00053668/hess-24-1109-2020.pdf https://hess.copernicus.org/articles/24/1109/2020/hess-24-1109-2020.pdf eng eng Copernicus Publications Hydrology and Earth System Sciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2100610 -- http://www.hydrol-earth-syst-sci.net/volumes_and_issues.html -- 1607-7938 https://doi.org/10.5194/hess-24-1109-2020 https://noa.gwlb.de/receive/cop_mods_00054015 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00053668/hess-24-1109-2020.pdf https://hess.copernicus.org/articles/24/1109/2020/hess-24-1109-2020.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2020 ftnonlinearchiv https://doi.org/10.5194/hess-24-1109-2020 2022-02-08T22:35:13Z Ice-wedge polygons are common Arctic landforms. The future of these landforms in a warming climate depends on the bidirectional feedback between the rate of ice-wedge degradation and changes in hydrological characteristics. This work aims to better understand the relative roles of vertical and horizontal water fluxes in the subsurface of polygonal landscapes, providing new insights and data to test and calibrate hydrological models. Field-scale investigations were conducted at an intensively instrumented location on the Barrow Environmental Observatory (BEO) near Utqiaġvik, AK, USA. Using a conservative tracer, we examined controls of microtopography and the frost table on subsurface flow and transport within a low-centered and a high-centered polygon. Bromide tracer was applied at both polygons in July 2015 and transport was monitored through two thaw seasons. Sampler arrays placed in polygon centers, rims, and troughs were used to monitor tracer concentrations. In both polygons, the tracer first infiltrated vertically until encountering the frost table and was then transported horizontally. Horizontal flow occurred in more locations and at higher velocities in the low-centered polygon than in the high-centered polygon. Preferential flow, influenced by frost table topography, was significant between polygon centers and troughs. Estimates of horizontal hydraulic conductivity were within the range of previous estimates of vertical conductivity, highlighting the importance of horizontal flow in these systems. This work forms a basis for understanding complexity of flow in polygonal landscapes. Article in Journal/Newspaper Arctic Niedersächsisches Online-Archiv NOA Arctic Hydrology and Earth System Sciences 24 3 1109 1129 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Wales, Nathan A. Gomez-Velez, Jesus D. Newman, Brent D. Wilson, Cathy J. Dafflon, Baptiste Kneafsey, Timothy J. Soom, Florian Wullschleger, Stan D. Understanding the relative importance of vertical and horizontal flow in ice-wedge polygons |
topic_facet |
article Verlagsveröffentlichung |
description |
Ice-wedge polygons are common Arctic landforms. The future of these landforms in a warming climate depends on the bidirectional feedback between the rate of ice-wedge degradation and changes in hydrological characteristics. This work aims to better understand the relative roles of vertical and horizontal water fluxes in the subsurface of polygonal landscapes, providing new insights and data to test and calibrate hydrological models. Field-scale investigations were conducted at an intensively instrumented location on the Barrow Environmental Observatory (BEO) near Utqiaġvik, AK, USA. Using a conservative tracer, we examined controls of microtopography and the frost table on subsurface flow and transport within a low-centered and a high-centered polygon. Bromide tracer was applied at both polygons in July 2015 and transport was monitored through two thaw seasons. Sampler arrays placed in polygon centers, rims, and troughs were used to monitor tracer concentrations. In both polygons, the tracer first infiltrated vertically until encountering the frost table and was then transported horizontally. Horizontal flow occurred in more locations and at higher velocities in the low-centered polygon than in the high-centered polygon. Preferential flow, influenced by frost table topography, was significant between polygon centers and troughs. Estimates of horizontal hydraulic conductivity were within the range of previous estimates of vertical conductivity, highlighting the importance of horizontal flow in these systems. This work forms a basis for understanding complexity of flow in polygonal landscapes. |
format |
Article in Journal/Newspaper |
author |
Wales, Nathan A. Gomez-Velez, Jesus D. Newman, Brent D. Wilson, Cathy J. Dafflon, Baptiste Kneafsey, Timothy J. Soom, Florian Wullschleger, Stan D. |
author_facet |
Wales, Nathan A. Gomez-Velez, Jesus D. Newman, Brent D. Wilson, Cathy J. Dafflon, Baptiste Kneafsey, Timothy J. Soom, Florian Wullschleger, Stan D. |
author_sort |
Wales, Nathan A. |
title |
Understanding the relative importance of vertical and horizontal flow in ice-wedge polygons |
title_short |
Understanding the relative importance of vertical and horizontal flow in ice-wedge polygons |
title_full |
Understanding the relative importance of vertical and horizontal flow in ice-wedge polygons |
title_fullStr |
Understanding the relative importance of vertical and horizontal flow in ice-wedge polygons |
title_full_unstemmed |
Understanding the relative importance of vertical and horizontal flow in ice-wedge polygons |
title_sort |
understanding the relative importance of vertical and horizontal flow in ice-wedge polygons |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/hess-24-1109-2020 https://noa.gwlb.de/receive/cop_mods_00054015 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00053668/hess-24-1109-2020.pdf https://hess.copernicus.org/articles/24/1109/2020/hess-24-1109-2020.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Hydrology and Earth System Sciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2100610 -- http://www.hydrol-earth-syst-sci.net/volumes_and_issues.html -- 1607-7938 https://doi.org/10.5194/hess-24-1109-2020 https://noa.gwlb.de/receive/cop_mods_00054015 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00053668/hess-24-1109-2020.pdf https://hess.copernicus.org/articles/24/1109/2020/hess-24-1109-2020.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/hess-24-1109-2020 |
container_title |
Hydrology and Earth System Sciences |
container_volume |
24 |
container_issue |
3 |
container_start_page |
1109 |
op_container_end_page |
1129 |
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1766341018806910976 |