Differential impact of thermal and physical permafrost disturbances on High Arctic dissolved and particulate fluvial fluxes
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 a...
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ftpubmed:oai:pubmedcentral.nih.gov:7366920 2023-05-15T14:48:08+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. 2020-07-16 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7366920/ http://www.ncbi.nlm.nih.gov/pubmed/32678255 https://doi.org/10.1038/s41598-020-68824-3 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7366920/ http://www.ncbi.nlm.nih.gov/pubmed/32678255 http://dx.doi.org/10.1038/s41598-020-68824-3 © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. CC-BY Sci Rep Article Text 2020 ftpubmed https://doi.org/10.1038/s41598-020-68824-3 2020-07-26T00:33:23Z 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. Text Arctic Climate change permafrost PubMed Central (PMC) Arctic Scientific Reports 10 1 |
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Article 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 |
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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. |
format |
Text |
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 |
Nature Publishing Group UK |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7366920/ http://www.ncbi.nlm.nih.gov/pubmed/32678255 https://doi.org/10.1038/s41598-020-68824-3 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change permafrost |
genre_facet |
Arctic Climate change permafrost |
op_source |
Sci Rep |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7366920/ http://www.ncbi.nlm.nih.gov/pubmed/32678255 http://dx.doi.org/10.1038/s41598-020-68824-3 |
op_rights |
© The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
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CC-BY |
op_doi |
https://doi.org/10.1038/s41598-020-68824-3 |
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Scientific Reports |
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