Evolution of shallow groundwater flow systems in areas of degrading permafrost
The recent increase in fresh-water discharge during low-flow conditions as observed in many (sub-) Arctic Rivers has been attributed to a reactivation of groundwater flow systems caused by permafrost degradation. Hydrogeological simulations show how groundwater flow conditions in an idealized aquife...
Published in: | Geophysical Research Letters |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:24314 2023-05-15T15:03:12+02:00 Evolution of shallow groundwater flow systems in areas of degrading permafrost Bense, VF Ferguson, G Kooi, H 2009 https://ueaeprints.uea.ac.uk/id/eprint/24314/ https://doi.org/10.1029/2009GL039225 unknown Bense, VF, Ferguson, G and Kooi, H (2009) Evolution of shallow groundwater flow systems in areas of degrading permafrost. Geophysical Research Letters, 36 (22). ISSN 1944-8007 doi:10.1029/2009GL039225 Article PeerReviewed 2009 ftuniveastangl https://doi.org/10.1029/2009GL039225 2023-01-30T21:26:09Z The recent increase in fresh-water discharge during low-flow conditions as observed in many (sub-) Arctic Rivers has been attributed to a reactivation of groundwater flow systems caused by permafrost degradation. Hydrogeological simulations show how groundwater flow conditions in an idealized aquifer system evolve on timescales of decades to centuries in response to climate warming scenarios as progressive lowering of the permafrost table establishes a growing shallow groundwater flow system. Ultimately, disappearance of residual permafrost at depth causes a sudden establishment of deep groundwater flow paths. The projected shifts in groundwater flow conditions drive characteristic non-linear trends in the evolution of increasing groundwater discharge to streams. Although the subsurface distribution of ice will markedly influence the system response, current modeling results suggest that late-stage accelerations in base flow increase of streams and rivers, are to be expected, even if surface air temperatures stabilize at the current levels in the near future. Article in Journal/Newspaper Arctic Ice permafrost University of East Anglia: UEA Digital Repository Arctic Geophysical Research Letters 36 22 |
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Open Polar |
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University of East Anglia: UEA Digital Repository |
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ftuniveastangl |
language |
unknown |
description |
The recent increase in fresh-water discharge during low-flow conditions as observed in many (sub-) Arctic Rivers has been attributed to a reactivation of groundwater flow systems caused by permafrost degradation. Hydrogeological simulations show how groundwater flow conditions in an idealized aquifer system evolve on timescales of decades to centuries in response to climate warming scenarios as progressive lowering of the permafrost table establishes a growing shallow groundwater flow system. Ultimately, disappearance of residual permafrost at depth causes a sudden establishment of deep groundwater flow paths. The projected shifts in groundwater flow conditions drive characteristic non-linear trends in the evolution of increasing groundwater discharge to streams. Although the subsurface distribution of ice will markedly influence the system response, current modeling results suggest that late-stage accelerations in base flow increase of streams and rivers, are to be expected, even if surface air temperatures stabilize at the current levels in the near future. |
format |
Article in Journal/Newspaper |
author |
Bense, VF Ferguson, G Kooi, H |
spellingShingle |
Bense, VF Ferguson, G Kooi, H Evolution of shallow groundwater flow systems in areas of degrading permafrost |
author_facet |
Bense, VF Ferguson, G Kooi, H |
author_sort |
Bense, VF |
title |
Evolution of shallow groundwater flow systems in areas of degrading permafrost |
title_short |
Evolution of shallow groundwater flow systems in areas of degrading permafrost |
title_full |
Evolution of shallow groundwater flow systems in areas of degrading permafrost |
title_fullStr |
Evolution of shallow groundwater flow systems in areas of degrading permafrost |
title_full_unstemmed |
Evolution of shallow groundwater flow systems in areas of degrading permafrost |
title_sort |
evolution of shallow groundwater flow systems in areas of degrading permafrost |
publishDate |
2009 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/24314/ https://doi.org/10.1029/2009GL039225 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice permafrost |
genre_facet |
Arctic Ice permafrost |
op_relation |
Bense, VF, Ferguson, G and Kooi, H (2009) Evolution of shallow groundwater flow systems in areas of degrading permafrost. Geophysical Research Letters, 36 (22). ISSN 1944-8007 doi:10.1029/2009GL039225 |
op_doi |
https://doi.org/10.1029/2009GL039225 |
container_title |
Geophysical Research Letters |
container_volume |
36 |
container_issue |
22 |
_version_ |
1766335088970170368 |