Classification and kinematics of the Planpincieux Glacier break-offs using photographic time-lapse analysis
Herein, we present results obtained from time-lapse imagery acquired by a digital single-lens reflex camera during 2014–18 used to monitor the Planpincieux Glacier on the Italian side of the Grandes Jorasses (Mont Blanc massif). We processed the images using image cross-correlation to measure the su...
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Language: | English |
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Cambridge University Press
2020
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ftdoajarticles:oai:doaj.org/article:2899cb96034c42828261416fc0dc1146 2023-05-15T16:57:36+02:00 Classification and kinematics of the Planpincieux Glacier break-offs using photographic time-lapse analysis Daniele Giordan Niccolò Dematteis Paolo Allasia Elena Motta 2020-04-01T00:00:00Z https://doi.org/10.1017/jog.2019.99 https://doaj.org/article/2899cb96034c42828261416fc0dc1146 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143019000996/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2019.99 0022-1430 1727-5652 https://doaj.org/article/2899cb96034c42828261416fc0dc1146 Journal of Glaciology, Vol 66, Pp 188-202 (2020) Glacier calving glacier fluctuations glacier hazards glacier monitoring mountain glaciers Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2020 ftdoajarticles https://doi.org/10.1017/jog.2019.99 2023-03-12T01:30:57Z Herein, we present results obtained from time-lapse imagery acquired by a digital single-lens reflex camera during 2014–18 used to monitor the Planpincieux Glacier on the Italian side of the Grandes Jorasses (Mont Blanc massif). We processed the images using image cross-correlation to measure the surface kinematics of the most active lobe of the glacier that presents a high velocity and frequent ice detachments. During the monitoring, we observed two or three periods of sharp acceleration per year that culminated with large break-offs followed by analogous decelerations. Overall, we registered more than 350 failures with a volume >100 m3, of which, 14 events had volumes larger than 10 000 m3. The study identified a monotonic positive relationship between the velocity and failure volume that may be used to estimate the volume of the collapses before an event. We identified the thresholds of velocity and acceleration that characterise the activation of the speed-up periods. The study allowed the characterisation of three different instability processes that lead to the break-off of ice chunks from the glacier terminus: (i) disaggregation, (ii) slab fracture and (iii) water tunnelling failure which can be differentiated based on the rheology, the volume involved and the trigger process. Article in Journal/Newspaper Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Mont Blanc ENVELOPE(69.468,69.468,-49.461,-49.461) Journal of Glaciology 66 256 188 202 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Glacier calving glacier fluctuations glacier hazards glacier monitoring mountain glaciers Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Glacier calving glacier fluctuations glacier hazards glacier monitoring mountain glaciers Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Daniele Giordan Niccolò Dematteis Paolo Allasia Elena Motta Classification and kinematics of the Planpincieux Glacier break-offs using photographic time-lapse analysis |
topic_facet |
Glacier calving glacier fluctuations glacier hazards glacier monitoring mountain glaciers Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Herein, we present results obtained from time-lapse imagery acquired by a digital single-lens reflex camera during 2014–18 used to monitor the Planpincieux Glacier on the Italian side of the Grandes Jorasses (Mont Blanc massif). We processed the images using image cross-correlation to measure the surface kinematics of the most active lobe of the glacier that presents a high velocity and frequent ice detachments. During the monitoring, we observed two or three periods of sharp acceleration per year that culminated with large break-offs followed by analogous decelerations. Overall, we registered more than 350 failures with a volume >100 m3, of which, 14 events had volumes larger than 10 000 m3. The study identified a monotonic positive relationship between the velocity and failure volume that may be used to estimate the volume of the collapses before an event. We identified the thresholds of velocity and acceleration that characterise the activation of the speed-up periods. The study allowed the characterisation of three different instability processes that lead to the break-off of ice chunks from the glacier terminus: (i) disaggregation, (ii) slab fracture and (iii) water tunnelling failure which can be differentiated based on the rheology, the volume involved and the trigger process. |
format |
Article in Journal/Newspaper |
author |
Daniele Giordan Niccolò Dematteis Paolo Allasia Elena Motta |
author_facet |
Daniele Giordan Niccolò Dematteis Paolo Allasia Elena Motta |
author_sort |
Daniele Giordan |
title |
Classification and kinematics of the Planpincieux Glacier break-offs using photographic time-lapse analysis |
title_short |
Classification and kinematics of the Planpincieux Glacier break-offs using photographic time-lapse analysis |
title_full |
Classification and kinematics of the Planpincieux Glacier break-offs using photographic time-lapse analysis |
title_fullStr |
Classification and kinematics of the Planpincieux Glacier break-offs using photographic time-lapse analysis |
title_full_unstemmed |
Classification and kinematics of the Planpincieux Glacier break-offs using photographic time-lapse analysis |
title_sort |
classification and kinematics of the planpincieux glacier break-offs using photographic time-lapse analysis |
publisher |
Cambridge University Press |
publishDate |
2020 |
url |
https://doi.org/10.1017/jog.2019.99 https://doaj.org/article/2899cb96034c42828261416fc0dc1146 |
long_lat |
ENVELOPE(69.468,69.468,-49.461,-49.461) |
geographic |
Mont Blanc |
geographic_facet |
Mont Blanc |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 66, Pp 188-202 (2020) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143019000996/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2019.99 0022-1430 1727-5652 https://doaj.org/article/2899cb96034c42828261416fc0dc1146 |
op_doi |
https://doi.org/10.1017/jog.2019.99 |
container_title |
Journal of Glaciology |
container_volume |
66 |
container_issue |
256 |
container_start_page |
188 |
op_container_end_page |
202 |
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1766049170769051648 |