Helheim Glacier ice velocity variability responds to runoff and terminus position change at different timescales
The Greenland Ice Sheet discharges ice to the ocean through hundreds of outlet glaciers. Recent acceleration of Greenland outlet glaciers has been linked to both oceanic and atmospheric drivers. Here, we leverage temporally dense observations, regional climate model output, and newly developed time...
Published in: | Nature Communications |
---|---|
Main Authors: | , , , , |
Format: | Text |
Language: | English |
Published: |
Nature Publishing Group UK
2022
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9556534/ https://doi.org/10.1038/s41467-022-33292-y |
id |
ftpubmed:oai:pubmedcentral.nih.gov:9556534 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:9556534 2023-05-15T16:21:00+02:00 Helheim Glacier ice velocity variability responds to runoff and terminus position change at different timescales Ultee, Lizz Felikson, Denis Minchew, Brent Stearns, Leigh A. Riel, Bryan 2022-10-12 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9556534/ https://doi.org/10.1038/s41467-022-33292-y en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9556534/ http://dx.doi.org/10.1038/s41467-022-33292-y © The Author(s) 2022 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 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/ (https://creativecommons.org/licenses/by/4.0/) . CC-BY Nat Commun Article Text 2022 ftpubmed https://doi.org/10.1038/s41467-022-33292-y 2022-10-16T00:59:34Z The Greenland Ice Sheet discharges ice to the ocean through hundreds of outlet glaciers. Recent acceleration of Greenland outlet glaciers has been linked to both oceanic and atmospheric drivers. Here, we leverage temporally dense observations, regional climate model output, and newly developed time series analysis tools to assess the most important forcings causing ice flow variability at one of the largest Greenland outlet glaciers, Helheim Glacier, from 2009 to 2017. We find that ice speed correlates most strongly with catchment-integrated runoff at seasonal to interannual scales, while multi-annual flow variability correlates most strongly with multi-annual terminus variability. The disparate time scales and the influence of subglacial topography on Helheim Glacier’s dynamics highlight different regimes that can inform modeling and forecasting of its future. Notably, our results suggest that the recent terminus history observed at Helheim is a response to, rather than the cause of, upstream changes. Text glacier Greenland Ice Sheet PubMed Central (PMC) Greenland Nature Communications 13 1 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Article |
spellingShingle |
Article Ultee, Lizz Felikson, Denis Minchew, Brent Stearns, Leigh A. Riel, Bryan Helheim Glacier ice velocity variability responds to runoff and terminus position change at different timescales |
topic_facet |
Article |
description |
The Greenland Ice Sheet discharges ice to the ocean through hundreds of outlet glaciers. Recent acceleration of Greenland outlet glaciers has been linked to both oceanic and atmospheric drivers. Here, we leverage temporally dense observations, regional climate model output, and newly developed time series analysis tools to assess the most important forcings causing ice flow variability at one of the largest Greenland outlet glaciers, Helheim Glacier, from 2009 to 2017. We find that ice speed correlates most strongly with catchment-integrated runoff at seasonal to interannual scales, while multi-annual flow variability correlates most strongly with multi-annual terminus variability. The disparate time scales and the influence of subglacial topography on Helheim Glacier’s dynamics highlight different regimes that can inform modeling and forecasting of its future. Notably, our results suggest that the recent terminus history observed at Helheim is a response to, rather than the cause of, upstream changes. |
format |
Text |
author |
Ultee, Lizz Felikson, Denis Minchew, Brent Stearns, Leigh A. Riel, Bryan |
author_facet |
Ultee, Lizz Felikson, Denis Minchew, Brent Stearns, Leigh A. Riel, Bryan |
author_sort |
Ultee, Lizz |
title |
Helheim Glacier ice velocity variability responds to runoff and terminus position change at different timescales |
title_short |
Helheim Glacier ice velocity variability responds to runoff and terminus position change at different timescales |
title_full |
Helheim Glacier ice velocity variability responds to runoff and terminus position change at different timescales |
title_fullStr |
Helheim Glacier ice velocity variability responds to runoff and terminus position change at different timescales |
title_full_unstemmed |
Helheim Glacier ice velocity variability responds to runoff and terminus position change at different timescales |
title_sort |
helheim glacier ice velocity variability responds to runoff and terminus position change at different timescales |
publisher |
Nature Publishing Group UK |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9556534/ https://doi.org/10.1038/s41467-022-33292-y |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Ice Sheet |
genre_facet |
glacier Greenland Ice Sheet |
op_source |
Nat Commun |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9556534/ http://dx.doi.org/10.1038/s41467-022-33292-y |
op_rights |
© The Author(s) 2022 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 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/ (https://creativecommons.org/licenses/by/4.0/) . |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-022-33292-y |
container_title |
Nature Communications |
container_volume |
13 |
container_issue |
1 |
_version_ |
1766009013684666368 |