Modelling the effects of permafrost loss on discharge from a wetland‐dominated, discontinuous permafrost basin
Abstract Permafrost degradation in the peat‐rich southern fringe of the discontinuous permafrost zone is catalysing substantial changes to land cover with expansion of permafrost‐free wetlands (bogs and fens) and shrinkage of forest‐dominated permafrost peat plateaux. Predicting discharge from headw...
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crwiley:10.1002/hyp.13546 2024-09-15T18:26:41+00:00 Modelling the effects of permafrost loss on discharge from a wetland‐dominated, discontinuous permafrost basin Stone, Lindsay E. Fang, Xing Haynes, Kristine M. Helbig, Manuel Pomeroy, John W. Sonnentag, Oliver Quinton, William L. Natural Sciences and Engineering Research Council of Canada 2019 http://dx.doi.org/10.1002/hyp.13546 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.13546 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/hyp.13546 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Hydrological Processes volume 33, issue 20, page 2607-2626 ISSN 0885-6087 1099-1085 journal-article 2019 crwiley https://doi.org/10.1002/hyp.13546 2024-07-18T04:22:53Z Abstract Permafrost degradation in the peat‐rich southern fringe of the discontinuous permafrost zone is catalysing substantial changes to land cover with expansion of permafrost‐free wetlands (bogs and fens) and shrinkage of forest‐dominated permafrost peat plateaux. Predicting discharge from headwater basins in this region depends upon understanding and numerically representing the interactions between storage and discharge within and between the major land cover types and how these interactions are changing. To better understand the implications of advanced permafrost thaw‐induced land cover change on wetland discharge, with all landscape features capable of contributing to drainage networks, the hydrological behaviour of a channel fen sub‐basin in the headwaters of Scotty Creek, Northwest Territories, Canada, dominated by peat plateau–bog complexes, was modelled using the Cold Regions Hydrological Modelling platform for the period of 2009 to 2015. The model construction was based on field water balance observations, and performance was deemed adequate when evaluated against measured water balance components. A sensitivity analysis was conducted to assess the impact of progressive permafrost loss on discharge from the sub‐basin, in which all units of the sub‐basin have the potential to contribute to the drainage network, by incrementally reducing the ratio of wetland to plateau in the modelled sub‐basin. Simulated reductions in permafrost extent decreased total annual discharge from the channel fen by 2.5% for every 10% decrease in permafrost area due to increased surface storage capacity, reduced run‐off efficiency, and increased landscape evapotranspiration. Runoff ratios for the fen hydrological response unit dropped from 0.54 to 0.48 after the simulated 50% permafrost area loss with a substantial reduction of 0.47 to 0.31 during the snowmelt season. The reduction in peat plateau area resulted in decreased seasonal variability in discharge due to changes in the flow path routing, with amplified low flows ... Article in Journal/Newspaper Northwest Territories Peat Peat plateau permafrost Wiley Online Library Hydrological Processes 33 20 2607 2626 |
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Wiley Online Library |
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English |
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Abstract Permafrost degradation in the peat‐rich southern fringe of the discontinuous permafrost zone is catalysing substantial changes to land cover with expansion of permafrost‐free wetlands (bogs and fens) and shrinkage of forest‐dominated permafrost peat plateaux. Predicting discharge from headwater basins in this region depends upon understanding and numerically representing the interactions between storage and discharge within and between the major land cover types and how these interactions are changing. To better understand the implications of advanced permafrost thaw‐induced land cover change on wetland discharge, with all landscape features capable of contributing to drainage networks, the hydrological behaviour of a channel fen sub‐basin in the headwaters of Scotty Creek, Northwest Territories, Canada, dominated by peat plateau–bog complexes, was modelled using the Cold Regions Hydrological Modelling platform for the period of 2009 to 2015. The model construction was based on field water balance observations, and performance was deemed adequate when evaluated against measured water balance components. A sensitivity analysis was conducted to assess the impact of progressive permafrost loss on discharge from the sub‐basin, in which all units of the sub‐basin have the potential to contribute to the drainage network, by incrementally reducing the ratio of wetland to plateau in the modelled sub‐basin. Simulated reductions in permafrost extent decreased total annual discharge from the channel fen by 2.5% for every 10% decrease in permafrost area due to increased surface storage capacity, reduced run‐off efficiency, and increased landscape evapotranspiration. Runoff ratios for the fen hydrological response unit dropped from 0.54 to 0.48 after the simulated 50% permafrost area loss with a substantial reduction of 0.47 to 0.31 during the snowmelt season. The reduction in peat plateau area resulted in decreased seasonal variability in discharge due to changes in the flow path routing, with amplified low flows ... |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Stone, Lindsay E. Fang, Xing Haynes, Kristine M. Helbig, Manuel Pomeroy, John W. Sonnentag, Oliver Quinton, William L. |
spellingShingle |
Stone, Lindsay E. Fang, Xing Haynes, Kristine M. Helbig, Manuel Pomeroy, John W. Sonnentag, Oliver Quinton, William L. Modelling the effects of permafrost loss on discharge from a wetland‐dominated, discontinuous permafrost basin |
author_facet |
Stone, Lindsay E. Fang, Xing Haynes, Kristine M. Helbig, Manuel Pomeroy, John W. Sonnentag, Oliver Quinton, William L. |
author_sort |
Stone, Lindsay E. |
title |
Modelling the effects of permafrost loss on discharge from a wetland‐dominated, discontinuous permafrost basin |
title_short |
Modelling the effects of permafrost loss on discharge from a wetland‐dominated, discontinuous permafrost basin |
title_full |
Modelling the effects of permafrost loss on discharge from a wetland‐dominated, discontinuous permafrost basin |
title_fullStr |
Modelling the effects of permafrost loss on discharge from a wetland‐dominated, discontinuous permafrost basin |
title_full_unstemmed |
Modelling the effects of permafrost loss on discharge from a wetland‐dominated, discontinuous permafrost basin |
title_sort |
modelling the effects of permafrost loss on discharge from a wetland‐dominated, discontinuous permafrost basin |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1002/hyp.13546 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.13546 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/hyp.13546 |
genre |
Northwest Territories Peat Peat plateau permafrost |
genre_facet |
Northwest Territories Peat Peat plateau permafrost |
op_source |
Hydrological Processes volume 33, issue 20, page 2607-2626 ISSN 0885-6087 1099-1085 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/hyp.13546 |
container_title |
Hydrological Processes |
container_volume |
33 |
container_issue |
20 |
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2607 |
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2626 |
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1810467189738700800 |