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Emerging dominance of summer rainfall driving High Arctic terrestrial-aquatic connectivity

Hydrological transformations induced by climate warming are causing Arctic annual fluvial energy to shift from skewed (snowmelt-dominated) to multimodal (snowmelt- and rainfall-dominated) distributions. We integrated decade-long hydrometeorological and biogeochemical data from the High Arctic to sho...

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Autores principales: Beel, C. R., Heslop, J. K., Orwin, J. F., Pope, M. A., Schevers, A. J., Hung, J. K. Y., Lafrenière, M. J., Lamoureux, S. F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7933336/
https://www.ncbi.nlm.nih.gov/pubmed/33664252
http://dx.doi.org/10.1038/s41467-021-21759-3
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author Beel, C. R.
Heslop, J. K.
Orwin, J. F.
Pope, M. A.
Schevers, A. J.
Hung, J. K. Y.
Lafrenière, M. J.
Lamoureux, S. F.
author_facet Beel, C. R.
Heslop, J. K.
Orwin, J. F.
Pope, M. A.
Schevers, A. J.
Hung, J. K. Y.
Lafrenière, M. J.
Lamoureux, S. F.
author_sort Beel, C. R.
collection PubMed
description Hydrological transformations induced by climate warming are causing Arctic annual fluvial energy to shift from skewed (snowmelt-dominated) to multimodal (snowmelt- and rainfall-dominated) distributions. We integrated decade-long hydrometeorological and biogeochemical data from the High Arctic to show that shifts in the timing and magnitude of annual discharge patterns and stream power budgets are causing Arctic material transfer regimes to undergo fundamental changes. Increased late summer rainfall enhanced terrestrial-aquatic connectivity for dissolved and particulate material fluxes. Permafrost disturbances (<3% of the watersheds’ areal extent) reduced watershed-scale dissolved organic carbon export, offsetting concurrent increased export in undisturbed watersheds. To overcome the watersheds’ buffering capacity for transferring particulate material (30 ± 9 Watt), rainfall events had to increase by an order of magnitude, indicating the landscape is primed for accelerated geomorphological change when future rainfall magnitudes and consequent pluvial responses exceed the current buffering capacity of the terrestrial-aquatic continuum.
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spelling pubmed-79333362021-03-21 Emerging dominance of summer rainfall driving High Arctic terrestrial-aquatic connectivity Beel, C. R. Heslop, J. K. Orwin, J. F. Pope, M. A. Schevers, A. J. Hung, J. K. Y. Lafrenière, M. J. Lamoureux, S. F. Nat Commun Article Hydrological transformations induced by climate warming are causing Arctic annual fluvial energy to shift from skewed (snowmelt-dominated) to multimodal (snowmelt- and rainfall-dominated) distributions. We integrated decade-long hydrometeorological and biogeochemical data from the High Arctic to show that shifts in the timing and magnitude of annual discharge patterns and stream power budgets are causing Arctic material transfer regimes to undergo fundamental changes. Increased late summer rainfall enhanced terrestrial-aquatic connectivity for dissolved and particulate material fluxes. Permafrost disturbances (<3% of the watersheds’ areal extent) reduced watershed-scale dissolved organic carbon export, offsetting concurrent increased export in undisturbed watersheds. To overcome the watersheds’ buffering capacity for transferring particulate material (30 ± 9 Watt), rainfall events had to increase by an order of magnitude, indicating the landscape is primed for accelerated geomorphological change when future rainfall magnitudes and consequent pluvial responses exceed the current buffering capacity of the terrestrial-aquatic continuum. Nature Publishing Group UK 2021-03-04 /pmc/articles/PMC7933336/ /pubmed/33664252 http://dx.doi.org/10.1038/s41467-021-21759-3 Text en © Crown 2021 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/.
spellingShingle Article
Beel, C. R.
Heslop, J. K.
Orwin, J. F.
Pope, M. A.
Schevers, A. J.
Hung, J. K. Y.
Lafrenière, M. J.
Lamoureux, S. F.
Emerging dominance of summer rainfall driving High Arctic terrestrial-aquatic connectivity
title Emerging dominance of summer rainfall driving High Arctic terrestrial-aquatic connectivity
title_full Emerging dominance of summer rainfall driving High Arctic terrestrial-aquatic connectivity
title_fullStr Emerging dominance of summer rainfall driving High Arctic terrestrial-aquatic connectivity
title_full_unstemmed Emerging dominance of summer rainfall driving High Arctic terrestrial-aquatic connectivity
title_short Emerging dominance of summer rainfall driving High Arctic terrestrial-aquatic connectivity
title_sort emerging dominance of summer rainfall driving high arctic terrestrial-aquatic connectivity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7933336/
https://www.ncbi.nlm.nih.gov/pubmed/33664252
http://dx.doi.org/10.1038/s41467-021-21759-3
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