Understanding of an Iceberg Breaking Off Event Based on Ice-Front Motion Analysis of Amery Ice Shelf, Antarctica
On 26 September 2019, a massive iceberg broke off the west side of the Amery Ice Shelf (AIS) in East Antarctica. Since 1973, the AIS calving front has steadily advanced at a rate of 1.0 km yr −1 . However, the advancement rate of the central portion of the AIS increased dramatically during 2012–2015...
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MDPI AG
2021
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ftdoajarticles:oai:doaj.org/article:4f15b5e8a02143b6899e37ade583f5a2 2023-05-15T13:21:58+02:00 Understanding of an Iceberg Breaking Off Event Based on Ice-Front Motion Analysis of Amery Ice Shelf, Antarctica Zhaohui Chi Andrew Klein 2021-12-01T00:00:00Z https://doi.org/10.3390/rs13244983 https://doaj.org/article/4f15b5e8a02143b6899e37ade583f5a2 EN eng MDPI AG https://www.mdpi.com/2072-4292/13/24/4983 https://doaj.org/toc/2072-4292 doi:10.3390/rs13244983 2072-4292 https://doaj.org/article/4f15b5e8a02143b6899e37ade583f5a2 Remote Sensing, Vol 13, Iss 4983, p 4983 (2021) ice-front motion analysis Amery Ice Shelf Antarctica Science Q article 2021 ftdoajarticles https://doi.org/10.3390/rs13244983 2022-12-31T12:46:27Z On 26 September 2019, a massive iceberg broke off the west side of the Amery Ice Shelf (AIS) in East Antarctica. Since 1973, the AIS calving front has steadily advanced at a rate of 1.0 km yr −1 . However, the advancement rate of the central portion of the AIS increased dramatically during 2012–2015, which indicates a velocity increase prior to the calving event. Eight calving front locations from 1973 to 2018 were mapped to investigate the advancement rate of AIS over the entire observational period. Additionally, the propagation of rift A was observed unstable from 2012 to 2015. The westward propagation rate of rift A1 increased to 3.7 km yr −1 from 2015 to 2017, which was considerably faster than the other rifts near the AIS calving front. The increased advancement rate and the increasing propagation magnitude of at least one active rift appear to be precursors of this large calving event. Article in Journal/Newspaper Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Shelf Directory of Open Access Journals: DOAJ Articles Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) East Antarctica Remote Sensing 13 24 4983 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ice-front motion analysis Amery Ice Shelf Antarctica Science Q |
spellingShingle |
ice-front motion analysis Amery Ice Shelf Antarctica Science Q Zhaohui Chi Andrew Klein Understanding of an Iceberg Breaking Off Event Based on Ice-Front Motion Analysis of Amery Ice Shelf, Antarctica |
topic_facet |
ice-front motion analysis Amery Ice Shelf Antarctica Science Q |
description |
On 26 September 2019, a massive iceberg broke off the west side of the Amery Ice Shelf (AIS) in East Antarctica. Since 1973, the AIS calving front has steadily advanced at a rate of 1.0 km yr −1 . However, the advancement rate of the central portion of the AIS increased dramatically during 2012–2015, which indicates a velocity increase prior to the calving event. Eight calving front locations from 1973 to 2018 were mapped to investigate the advancement rate of AIS over the entire observational period. Additionally, the propagation of rift A was observed unstable from 2012 to 2015. The westward propagation rate of rift A1 increased to 3.7 km yr −1 from 2015 to 2017, which was considerably faster than the other rifts near the AIS calving front. The increased advancement rate and the increasing propagation magnitude of at least one active rift appear to be precursors of this large calving event. |
format |
Article in Journal/Newspaper |
author |
Zhaohui Chi Andrew Klein |
author_facet |
Zhaohui Chi Andrew Klein |
author_sort |
Zhaohui Chi |
title |
Understanding of an Iceberg Breaking Off Event Based on Ice-Front Motion Analysis of Amery Ice Shelf, Antarctica |
title_short |
Understanding of an Iceberg Breaking Off Event Based on Ice-Front Motion Analysis of Amery Ice Shelf, Antarctica |
title_full |
Understanding of an Iceberg Breaking Off Event Based on Ice-Front Motion Analysis of Amery Ice Shelf, Antarctica |
title_fullStr |
Understanding of an Iceberg Breaking Off Event Based on Ice-Front Motion Analysis of Amery Ice Shelf, Antarctica |
title_full_unstemmed |
Understanding of an Iceberg Breaking Off Event Based on Ice-Front Motion Analysis of Amery Ice Shelf, Antarctica |
title_sort |
understanding of an iceberg breaking off event based on ice-front motion analysis of amery ice shelf, antarctica |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/rs13244983 https://doaj.org/article/4f15b5e8a02143b6899e37ade583f5a2 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) |
geographic |
Amery Amery Ice Shelf East Antarctica |
geographic_facet |
Amery Amery Ice Shelf East Antarctica |
genre |
Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Shelf |
genre_facet |
Amery Ice Shelf Antarc* Antarctica East Antarctica Ice Shelf |
op_source |
Remote Sensing, Vol 13, Iss 4983, p 4983 (2021) |
op_relation |
https://www.mdpi.com/2072-4292/13/24/4983 https://doaj.org/toc/2072-4292 doi:10.3390/rs13244983 2072-4292 https://doaj.org/article/4f15b5e8a02143b6899e37ade583f5a2 |
op_doi |
https://doi.org/10.3390/rs13244983 |
container_title |
Remote Sensing |
container_volume |
13 |
container_issue |
24 |
container_start_page |
4983 |
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1766362510783414272 |