Evidences of Permafrost Signatures in the Planform Shape of Arctic Meandering Streams
Abstract We investigate whether geomorphic signatures of permafrost are embedded in planforms of river meanders, and we inquire as to how physical factors unique to permafrost environments are able to affect their dynamics. By exploiting satellite imagery, a data set of 19 freely‐meandering Arctic r...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2024
|
Subjects: | |
Online Access: | https://doi.org/10.1029/2024GL109410 https://doaj.org/article/a7fdafdf14724ae6b62df13e7a517ceb |
id |
ftdoajarticles:oai:doaj.org/article:a7fdafdf14724ae6b62df13e7a517ceb |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:a7fdafdf14724ae6b62df13e7a517ceb 2024-09-30T14:30:19+00:00 Evidences of Permafrost Signatures in the Planform Shape of Arctic Meandering Streams Niccolò Ragno Riccardo Bonanomi Marta Crivellaro Marco Tubino 2024-09-01T00:00:00Z https://doi.org/10.1029/2024GL109410 https://doaj.org/article/a7fdafdf14724ae6b62df13e7a517ceb EN eng Wiley https://doi.org/10.1029/2024GL109410 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2024GL109410 https://doaj.org/article/a7fdafdf14724ae6b62df13e7a517ceb Geophysical Research Letters, Vol 51, Iss 17, Pp n/a-n/a (2024) morphodynamics meandering permafrost remote sensing Geophysics. Cosmic physics QC801-809 article 2024 ftdoajarticles https://doi.org/10.1029/2024GL109410 2024-09-17T16:00:46Z Abstract We investigate whether geomorphic signatures of permafrost are embedded in planforms of river meanders, and we inquire as to how physical factors unique to permafrost environments are able to affect their dynamics. By exploiting satellite imagery, a data set of 19 freely‐meandering Arctic rivers is compared against an independent data set of 23 freely‐meandering streams flowing through temperate and tropical regions. Suitable dimensionless metrics are defined to characterize morphometric properties of meanders in terms of the spatio‐temporal distribution of curvature and channel width. Results show the absence of marked contrasts in the amplitude of bend‐curvature between the two data set. Differently, we find a permafrost signature in the channel width response, which manifests itself through larger values of the average bend‐width and by peaks of width fluctuations. Field data suggest that permafrost meanders tend to widen for increasing bend sinuosity, likely promoting a shift of their morphodynamic regime as final cutoff is approached. Article in Journal/Newspaper Arctic permafrost Directory of Open Access Journals: DOAJ Articles Arctic Geophysical Research Letters 51 17 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
morphodynamics meandering permafrost remote sensing Geophysics. Cosmic physics QC801-809 |
spellingShingle |
morphodynamics meandering permafrost remote sensing Geophysics. Cosmic physics QC801-809 Niccolò Ragno Riccardo Bonanomi Marta Crivellaro Marco Tubino Evidences of Permafrost Signatures in the Planform Shape of Arctic Meandering Streams |
topic_facet |
morphodynamics meandering permafrost remote sensing Geophysics. Cosmic physics QC801-809 |
description |
Abstract We investigate whether geomorphic signatures of permafrost are embedded in planforms of river meanders, and we inquire as to how physical factors unique to permafrost environments are able to affect their dynamics. By exploiting satellite imagery, a data set of 19 freely‐meandering Arctic rivers is compared against an independent data set of 23 freely‐meandering streams flowing through temperate and tropical regions. Suitable dimensionless metrics are defined to characterize morphometric properties of meanders in terms of the spatio‐temporal distribution of curvature and channel width. Results show the absence of marked contrasts in the amplitude of bend‐curvature between the two data set. Differently, we find a permafrost signature in the channel width response, which manifests itself through larger values of the average bend‐width and by peaks of width fluctuations. Field data suggest that permafrost meanders tend to widen for increasing bend sinuosity, likely promoting a shift of their morphodynamic regime as final cutoff is approached. |
format |
Article in Journal/Newspaper |
author |
Niccolò Ragno Riccardo Bonanomi Marta Crivellaro Marco Tubino |
author_facet |
Niccolò Ragno Riccardo Bonanomi Marta Crivellaro Marco Tubino |
author_sort |
Niccolò Ragno |
title |
Evidences of Permafrost Signatures in the Planform Shape of Arctic Meandering Streams |
title_short |
Evidences of Permafrost Signatures in the Planform Shape of Arctic Meandering Streams |
title_full |
Evidences of Permafrost Signatures in the Planform Shape of Arctic Meandering Streams |
title_fullStr |
Evidences of Permafrost Signatures in the Planform Shape of Arctic Meandering Streams |
title_full_unstemmed |
Evidences of Permafrost Signatures in the Planform Shape of Arctic Meandering Streams |
title_sort |
evidences of permafrost signatures in the planform shape of arctic meandering streams |
publisher |
Wiley |
publishDate |
2024 |
url |
https://doi.org/10.1029/2024GL109410 https://doaj.org/article/a7fdafdf14724ae6b62df13e7a517ceb |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost |
genre_facet |
Arctic permafrost |
op_source |
Geophysical Research Letters, Vol 51, Iss 17, Pp n/a-n/a (2024) |
op_relation |
https://doi.org/10.1029/2024GL109410 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2024GL109410 https://doaj.org/article/a7fdafdf14724ae6b62df13e7a517ceb |
op_doi |
https://doi.org/10.1029/2024GL109410 |
container_title |
Geophysical Research Letters |
container_volume |
51 |
container_issue |
17 |
_version_ |
1811635319989075968 |