Evaluating the Retreat, Arrest, and Regrowth of Crane Glacier Against Marine Ice Cliff Process Models
Abstract The fastest projected rates of sea level rise appear in models which include “the marine ice cliff instability (MICI),” a hypothesized but mostly unobserved process defined by rapid fracture and wastage of terminal ice cliffs that outpaces viscous relaxation and ice‐shelf formation. Crane G...
Published in: | Geophysical Research Letters |
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Online Access: | https://doi.org/10.1029/2022GL102400 https://doaj.org/article/f1dae5b65d8640869dd3c9c918c0c227 |
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ftdoajarticles:oai:doaj.org/article:f1dae5b65d8640869dd3c9c918c0c227 2024-09-15T18:02:59+00:00 Evaluating the Retreat, Arrest, and Regrowth of Crane Glacier Against Marine Ice Cliff Process Models C. Needell N. Holschuh 2023-02-01T00:00:00Z https://doi.org/10.1029/2022GL102400 https://doaj.org/article/f1dae5b65d8640869dd3c9c918c0c227 EN eng Wiley https://doi.org/10.1029/2022GL102400 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2022GL102400 https://doaj.org/article/f1dae5b65d8640869dd3c9c918c0c227 Geophysical Research Letters, Vol 50, Iss 4, Pp n/a-n/a (2023) ice sheets ice cliff MICI Crane Glacier altimetry Larsen B Ice Shelf Geophysics. Cosmic physics QC801-809 article 2023 ftdoajarticles https://doi.org/10.1029/2022GL102400 2024-08-05T17:49:23Z Abstract The fastest projected rates of sea level rise appear in models which include “the marine ice cliff instability (MICI),” a hypothesized but mostly unobserved process defined by rapid fracture and wastage of terminal ice cliffs that outpaces viscous relaxation and ice‐shelf formation. Crane Glacier's response to the Larsen B Ice Shelf collapse has been invoked as evidence of MICI in the observational record. Using available remote sensing data, we analyze Crane's retreat, arrest, and regrowth over the last two decades. Much of Crane's terminus retreat occurred in floating, not grounded ice. Retreat accelerated by at least 54% during the 2 years following ice shelf collapse. This is inconsistent with contemporaneous regional forcing that promoted ice shelf growth during this period, but consistent with a geometrically controlled positive feedback. We infer a maximum possible cliff height of 111 m, which according to process models, could enable cliff calving assuming damaged ice. Article in Journal/Newspaper Crane Glacier Ice Shelf Directory of Open Access Journals: DOAJ Articles Geophysical Research Letters 50 4 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ice sheets ice cliff MICI Crane Glacier altimetry Larsen B Ice Shelf Geophysics. Cosmic physics QC801-809 |
spellingShingle |
ice sheets ice cliff MICI Crane Glacier altimetry Larsen B Ice Shelf Geophysics. Cosmic physics QC801-809 C. Needell N. Holschuh Evaluating the Retreat, Arrest, and Regrowth of Crane Glacier Against Marine Ice Cliff Process Models |
topic_facet |
ice sheets ice cliff MICI Crane Glacier altimetry Larsen B Ice Shelf Geophysics. Cosmic physics QC801-809 |
description |
Abstract The fastest projected rates of sea level rise appear in models which include “the marine ice cliff instability (MICI),” a hypothesized but mostly unobserved process defined by rapid fracture and wastage of terminal ice cliffs that outpaces viscous relaxation and ice‐shelf formation. Crane Glacier's response to the Larsen B Ice Shelf collapse has been invoked as evidence of MICI in the observational record. Using available remote sensing data, we analyze Crane's retreat, arrest, and regrowth over the last two decades. Much of Crane's terminus retreat occurred in floating, not grounded ice. Retreat accelerated by at least 54% during the 2 years following ice shelf collapse. This is inconsistent with contemporaneous regional forcing that promoted ice shelf growth during this period, but consistent with a geometrically controlled positive feedback. We infer a maximum possible cliff height of 111 m, which according to process models, could enable cliff calving assuming damaged ice. |
format |
Article in Journal/Newspaper |
author |
C. Needell N. Holschuh |
author_facet |
C. Needell N. Holschuh |
author_sort |
C. Needell |
title |
Evaluating the Retreat, Arrest, and Regrowth of Crane Glacier Against Marine Ice Cliff Process Models |
title_short |
Evaluating the Retreat, Arrest, and Regrowth of Crane Glacier Against Marine Ice Cliff Process Models |
title_full |
Evaluating the Retreat, Arrest, and Regrowth of Crane Glacier Against Marine Ice Cliff Process Models |
title_fullStr |
Evaluating the Retreat, Arrest, and Regrowth of Crane Glacier Against Marine Ice Cliff Process Models |
title_full_unstemmed |
Evaluating the Retreat, Arrest, and Regrowth of Crane Glacier Against Marine Ice Cliff Process Models |
title_sort |
evaluating the retreat, arrest, and regrowth of crane glacier against marine ice cliff process models |
publisher |
Wiley |
publishDate |
2023 |
url |
https://doi.org/10.1029/2022GL102400 https://doaj.org/article/f1dae5b65d8640869dd3c9c918c0c227 |
genre |
Crane Glacier Ice Shelf |
genre_facet |
Crane Glacier Ice Shelf |
op_source |
Geophysical Research Letters, Vol 50, Iss 4, Pp n/a-n/a (2023) |
op_relation |
https://doi.org/10.1029/2022GL102400 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2022GL102400 https://doaj.org/article/f1dae5b65d8640869dd3c9c918c0c227 |
op_doi |
https://doi.org/10.1029/2022GL102400 |
container_title |
Geophysical Research Letters |
container_volume |
50 |
container_issue |
4 |
_version_ |
1810440527863087104 |