Formation of a large ice depression on Dålk Glacier (Larsemann Hills, East Antarctica) caused by the rapid drainage of an englacial cavity
In the afternoon of 30 January 2017, a catastrophic outburst flood occurred in the Larsemann Hills (Princess Elizabeth Land, East Antarctica). The rapid drainage of both a thin supraglacial layer of water (near Boulder Lake) and Lake Ledyanoe into the englacial Lake Dålk provoked its overfill and ou...
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Cambridge University Press
2021
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ftdoajarticles:oai:doaj.org/article:80464d34a1534eb79eeccc786e52414a 2023-05-15T14:01:35+02:00 Formation of a large ice depression on Dålk Glacier (Larsemann Hills, East Antarctica) caused by the rapid drainage of an englacial cavity Alina Boronina Sergey Popov Galina Pryakhina Antonina Chetverova Ekaterina Ryzhova Svetlana Grigoreva 2021-12-01T00:00:00Z https://doi.org/10.1017/jog.2021.58 https://doaj.org/article/80464d34a1534eb79eeccc786e52414a EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143021000587/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2021.58 0022-1430 1727-5652 https://doaj.org/article/80464d34a1534eb79eeccc786e52414a Journal of Glaciology, Vol 67, Pp 1121-1136 (2021) Antarctic glaciology glacier hazards glacier hydrology glacier modelling ground-penetrating radar Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2021 ftdoajarticles https://doi.org/10.1017/jog.2021.58 2023-03-12T01:30:57Z In the afternoon of 30 January 2017, a catastrophic outburst flood occurred in the Larsemann Hills (Princess Elizabeth Land, East Antarctica). The rapid drainage of both a thin supraglacial layer of water (near Boulder Lake) and Lake Ledyanoe into the englacial Lake Dålk provoked its overfill and outburst. As a result, a depression of 183 m × 220 m was formed in the place where Lake Dålk was located. This study summarises and clarifies the current state of knowledge on the flood that occurred in 2017. We present a phenomenological model of depression formation. We specify the reasons for the outburst of the system of lakes Boulder, Ledyanoe and Dålk. In addition, we carry out mathematical modelling of the outburst of each of the three lakes and estimate the flood severity. Outburst hydrographs, channel diameters, volume and duration of floods were calculated. Particular simulation results were validated with field data. In conclusion, we give an overview of the new outburst cycle of the lake system, which began in 2020 with the drainage of the lakes Boulder and Ledyanoe, and the new formation of Lake Dålk. Further research is required to improve our understanding of the lake system responses to changing external factors. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Journal of Glaciology Princess Elizabeth Land Directory of Open Access Journals: DOAJ Articles Antarctic East Antarctica Larsemann Hills ENVELOPE(76.217,76.217,-69.400,-69.400) Princess Elizabeth Land ENVELOPE(80.367,80.367,-68.500,-68.500) Dålk Glacier ENVELOPE(76.472,76.472,-69.426,-69.426) Boulder Lake ENVELOPE(76.391,76.391,-69.411,-69.411) Journal of Glaciology 67 266 1121 1136 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic glaciology glacier hazards glacier hydrology glacier modelling ground-penetrating radar Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Antarctic glaciology glacier hazards glacier hydrology glacier modelling ground-penetrating radar Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Alina Boronina Sergey Popov Galina Pryakhina Antonina Chetverova Ekaterina Ryzhova Svetlana Grigoreva Formation of a large ice depression on Dålk Glacier (Larsemann Hills, East Antarctica) caused by the rapid drainage of an englacial cavity |
topic_facet |
Antarctic glaciology glacier hazards glacier hydrology glacier modelling ground-penetrating radar Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
In the afternoon of 30 January 2017, a catastrophic outburst flood occurred in the Larsemann Hills (Princess Elizabeth Land, East Antarctica). The rapid drainage of both a thin supraglacial layer of water (near Boulder Lake) and Lake Ledyanoe into the englacial Lake Dålk provoked its overfill and outburst. As a result, a depression of 183 m × 220 m was formed in the place where Lake Dålk was located. This study summarises and clarifies the current state of knowledge on the flood that occurred in 2017. We present a phenomenological model of depression formation. We specify the reasons for the outburst of the system of lakes Boulder, Ledyanoe and Dålk. In addition, we carry out mathematical modelling of the outburst of each of the three lakes and estimate the flood severity. Outburst hydrographs, channel diameters, volume and duration of floods were calculated. Particular simulation results were validated with field data. In conclusion, we give an overview of the new outburst cycle of the lake system, which began in 2020 with the drainage of the lakes Boulder and Ledyanoe, and the new formation of Lake Dålk. Further research is required to improve our understanding of the lake system responses to changing external factors. |
format |
Article in Journal/Newspaper |
author |
Alina Boronina Sergey Popov Galina Pryakhina Antonina Chetverova Ekaterina Ryzhova Svetlana Grigoreva |
author_facet |
Alina Boronina Sergey Popov Galina Pryakhina Antonina Chetverova Ekaterina Ryzhova Svetlana Grigoreva |
author_sort |
Alina Boronina |
title |
Formation of a large ice depression on Dålk Glacier (Larsemann Hills, East Antarctica) caused by the rapid drainage of an englacial cavity |
title_short |
Formation of a large ice depression on Dålk Glacier (Larsemann Hills, East Antarctica) caused by the rapid drainage of an englacial cavity |
title_full |
Formation of a large ice depression on Dålk Glacier (Larsemann Hills, East Antarctica) caused by the rapid drainage of an englacial cavity |
title_fullStr |
Formation of a large ice depression on Dålk Glacier (Larsemann Hills, East Antarctica) caused by the rapid drainage of an englacial cavity |
title_full_unstemmed |
Formation of a large ice depression on Dålk Glacier (Larsemann Hills, East Antarctica) caused by the rapid drainage of an englacial cavity |
title_sort |
formation of a large ice depression on dålk glacier (larsemann hills, east antarctica) caused by the rapid drainage of an englacial cavity |
publisher |
Cambridge University Press |
publishDate |
2021 |
url |
https://doi.org/10.1017/jog.2021.58 https://doaj.org/article/80464d34a1534eb79eeccc786e52414a |
long_lat |
ENVELOPE(76.217,76.217,-69.400,-69.400) ENVELOPE(80.367,80.367,-68.500,-68.500) ENVELOPE(76.472,76.472,-69.426,-69.426) ENVELOPE(76.391,76.391,-69.411,-69.411) |
geographic |
Antarctic East Antarctica Larsemann Hills Princess Elizabeth Land Dålk Glacier Boulder Lake |
geographic_facet |
Antarctic East Antarctica Larsemann Hills Princess Elizabeth Land Dålk Glacier Boulder Lake |
genre |
Antarc* Antarctic Antarctica East Antarctica Journal of Glaciology Princess Elizabeth Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Journal of Glaciology Princess Elizabeth Land |
op_source |
Journal of Glaciology, Vol 67, Pp 1121-1136 (2021) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143021000587/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2021.58 0022-1430 1727-5652 https://doaj.org/article/80464d34a1534eb79eeccc786e52414a |
op_doi |
https://doi.org/10.1017/jog.2021.58 |
container_title |
Journal of Glaciology |
container_volume |
67 |
container_issue |
266 |
container_start_page |
1121 |
op_container_end_page |
1136 |
_version_ |
1766271499091574784 |