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Unchanged frequency and decreasing magnitude of outbursts from ice-dammed lakes in Alaska
Glacial lakes can form and grow due to glacial retreat, and rapid lake drainage can produce destructive floods. Outburst flood compilations show a temporal increase in frequency; however, recent studies highlight the role of observational bias, creating uncertainty about current and future glacial-l...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10545694/ https://www.ncbi.nlm.nih.gov/pubmed/37783682 http://dx.doi.org/10.1038/s41467-023-41794-6 |
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author | Rick, B. McGrath, D. McCoy, S. W. Armstrong, W. H. |
author_facet | Rick, B. McGrath, D. McCoy, S. W. Armstrong, W. H. |
author_sort | Rick, B. |
collection | PubMed |
description | Glacial lakes can form and grow due to glacial retreat, and rapid lake drainage can produce destructive floods. Outburst flood compilations show a temporal increase in frequency; however, recent studies highlight the role of observational bias, creating uncertainty about current and future glacial-lake hazards. Here, we focus on the Alaska region, which generated a third of previously documented outbursts globally. Using multitemporal satellite imagery, we documented 1150 drainages from 106 ice-dammed lakes between 1985 and 2020. Documented events became more frequent over time, however, accounting for increasing image availability reveals no significant increase occurred. Most lakes decreased in area and volume, suggesting a reduction in regional flood hazard. Our satellite-based approach documented 60% more events in a 35-year period than had previously been documented over 100 years. This suggests that outburst floods have historically been underreported and warrants systematic study of other regions. |
format | Online Article Text |
id | pubmed-10545694 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-105456942023-10-04 Unchanged frequency and decreasing magnitude of outbursts from ice-dammed lakes in Alaska Rick, B. McGrath, D. McCoy, S. W. Armstrong, W. H. Nat Commun Article Glacial lakes can form and grow due to glacial retreat, and rapid lake drainage can produce destructive floods. Outburst flood compilations show a temporal increase in frequency; however, recent studies highlight the role of observational bias, creating uncertainty about current and future glacial-lake hazards. Here, we focus on the Alaska region, which generated a third of previously documented outbursts globally. Using multitemporal satellite imagery, we documented 1150 drainages from 106 ice-dammed lakes between 1985 and 2020. Documented events became more frequent over time, however, accounting for increasing image availability reveals no significant increase occurred. Most lakes decreased in area and volume, suggesting a reduction in regional flood hazard. Our satellite-based approach documented 60% more events in a 35-year period than had previously been documented over 100 years. This suggests that outburst floods have historically been underreported and warrants systematic study of other regions. Nature Publishing Group UK 2023-10-02 /pmc/articles/PMC10545694/ /pubmed/37783682 http://dx.doi.org/10.1038/s41467-023-41794-6 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Rick, B. McGrath, D. McCoy, S. W. Armstrong, W. H. Unchanged frequency and decreasing magnitude of outbursts from ice-dammed lakes in Alaska |
title | Unchanged frequency and decreasing magnitude of outbursts from ice-dammed lakes in Alaska |
title_full | Unchanged frequency and decreasing magnitude of outbursts from ice-dammed lakes in Alaska |
title_fullStr | Unchanged frequency and decreasing magnitude of outbursts from ice-dammed lakes in Alaska |
title_full_unstemmed | Unchanged frequency and decreasing magnitude of outbursts from ice-dammed lakes in Alaska |
title_short | Unchanged frequency and decreasing magnitude of outbursts from ice-dammed lakes in Alaska |
title_sort | unchanged frequency and decreasing magnitude of outbursts from ice-dammed lakes in alaska |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10545694/ https://www.ncbi.nlm.nih.gov/pubmed/37783682 http://dx.doi.org/10.1038/s41467-023-41794-6 |
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