Differential impact of thermal and physical permafrost disturbances on High Arctic dissolved and particulate fluvial fluxes
Abstract Climate warming and changing precipitation patterns have thermally (active layer deepening) and physically (permafrost-thaw related mass movements) disturbed permafrost-underlain watersheds across much of the Arctic, increasing the transfer of dissolved and particulate material from terrest...
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2020
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Online Access: | http://dx.doi.org/10.1038/s41598-020-68824-3 http://www.nature.com/articles/s41598-020-68824-3.pdf http://www.nature.com/articles/s41598-020-68824-3 |
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crspringernat:10.1038/s41598-020-68824-3 2023-05-15T14:48:16+02:00 Differential impact of thermal and physical permafrost disturbances on High Arctic dissolved and particulate fluvial fluxes Beel, C. R. Lamoureux, S. F. Orwin, J. F. Pope, M. A. Lafrenière, M. J. Scott, N. A. ArcticNet Gouvernement du Canada | Natural Sciences and Engineering Research Council of Canada 2020 http://dx.doi.org/10.1038/s41598-020-68824-3 http://www.nature.com/articles/s41598-020-68824-3.pdf http://www.nature.com/articles/s41598-020-68824-3 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Scientific Reports volume 10, issue 1 ISSN 2045-2322 Multidisciplinary journal-article 2020 crspringernat https://doi.org/10.1038/s41598-020-68824-3 2022-01-04T11:05:33Z Abstract Climate warming and changing precipitation patterns have thermally (active layer deepening) and physically (permafrost-thaw related mass movements) disturbed permafrost-underlain watersheds across much of the Arctic, increasing the transfer of dissolved and particulate material from terrestrial to aquatic ecosystems. We examined the multiyear (2006–2017) impact of thermal and physical permafrost disturbances on all of the major components of fluvial flux. Thermal disturbances increased the flux of dissolved organic carbon (DOC), but localized physical disturbances decreased multiyear DOC flux. Physical disturbances increased major ion and suspended sediment flux, which remained elevated a decade after disturbance, and changed carbon export from a DOC to a particulate organic carbon (POC) dominated system. As the magnitude and frequency of physical permafrost disturbance intensifies in response to Arctic climate change, disturbances will become an increasingly important mechanism to deliver POC from terrestrial to aquatic ecosystems. Although nival runoff remained the primary hydrological driver, the importance of pluvial runoff as driver of fluvial flux increased following both thermal and physical permafrost disturbance. We conclude the transition from a nival-dominated fluvial regime to a regime where rainfall runoff is proportionately more important will be a likely tipping point to accelerated High Arctic change. Article in Journal/Newspaper Arctic Climate change permafrost Springer Nature (via Crossref) Arctic Scientific Reports 10 1 |
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Springer Nature (via Crossref) |
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English |
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Multidisciplinary Beel, C. R. Lamoureux, S. F. Orwin, J. F. Pope, M. A. Lafrenière, M. J. Scott, N. A. Differential impact of thermal and physical permafrost disturbances on High Arctic dissolved and particulate fluvial fluxes |
topic_facet |
Multidisciplinary |
description |
Abstract Climate warming and changing precipitation patterns have thermally (active layer deepening) and physically (permafrost-thaw related mass movements) disturbed permafrost-underlain watersheds across much of the Arctic, increasing the transfer of dissolved and particulate material from terrestrial to aquatic ecosystems. We examined the multiyear (2006–2017) impact of thermal and physical permafrost disturbances on all of the major components of fluvial flux. Thermal disturbances increased the flux of dissolved organic carbon (DOC), but localized physical disturbances decreased multiyear DOC flux. Physical disturbances increased major ion and suspended sediment flux, which remained elevated a decade after disturbance, and changed carbon export from a DOC to a particulate organic carbon (POC) dominated system. As the magnitude and frequency of physical permafrost disturbance intensifies in response to Arctic climate change, disturbances will become an increasingly important mechanism to deliver POC from terrestrial to aquatic ecosystems. Although nival runoff remained the primary hydrological driver, the importance of pluvial runoff as driver of fluvial flux increased following both thermal and physical permafrost disturbance. We conclude the transition from a nival-dominated fluvial regime to a regime where rainfall runoff is proportionately more important will be a likely tipping point to accelerated High Arctic change. |
author2 |
ArcticNet Gouvernement du Canada | Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Beel, C. R. Lamoureux, S. F. Orwin, J. F. Pope, M. A. Lafrenière, M. J. Scott, N. A. |
author_facet |
Beel, C. R. Lamoureux, S. F. Orwin, J. F. Pope, M. A. Lafrenière, M. J. Scott, N. A. |
author_sort |
Beel, C. R. |
title |
Differential impact of thermal and physical permafrost disturbances on High Arctic dissolved and particulate fluvial fluxes |
title_short |
Differential impact of thermal and physical permafrost disturbances on High Arctic dissolved and particulate fluvial fluxes |
title_full |
Differential impact of thermal and physical permafrost disturbances on High Arctic dissolved and particulate fluvial fluxes |
title_fullStr |
Differential impact of thermal and physical permafrost disturbances on High Arctic dissolved and particulate fluvial fluxes |
title_full_unstemmed |
Differential impact of thermal and physical permafrost disturbances on High Arctic dissolved and particulate fluvial fluxes |
title_sort |
differential impact of thermal and physical permafrost disturbances on high arctic dissolved and particulate fluvial fluxes |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
http://dx.doi.org/10.1038/s41598-020-68824-3 http://www.nature.com/articles/s41598-020-68824-3.pdf http://www.nature.com/articles/s41598-020-68824-3 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change permafrost |
genre_facet |
Arctic Climate change permafrost |
op_source |
Scientific Reports volume 10, issue 1 ISSN 2045-2322 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-020-68824-3 |
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Scientific Reports |
container_volume |
10 |
container_issue |
1 |
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1766319359403229184 |