Calving, ice flow, and thickness of outlet glaciers controlled by land-fast sea ice in Lützow-Holm Bay, East Antarctica
To investigate the mechanisms driving recent changes in outlet glaciers in Antarctica, we measured the glacier front position, flow velocity and surface elevation of five outlet glaciers flowing into Lützow-Holm Bay in East Antarctica. After a steady advance from 2008 to 2015, all the glaciers synch...
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ftdoajarticles:oai:doaj.org/article:b468552ba998423db3c2ccb68c6ad260 2023-09-05T13:14:03+02:00 Calving, ice flow, and thickness of outlet glaciers controlled by land-fast sea ice in Lützow-Holm Bay, East Antarctica Ken Kondo Shin Sugiyama https://doi.org/10.1017/jog.2023.59 https://doaj.org/article/b468552ba998423db3c2ccb68c6ad260 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S002214302300059X/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2023.59 0022-1430 1727-5652 https://doaj.org/article/b468552ba998423db3c2ccb68c6ad260 Journal of Glaciology, Pp 1-13 Antarctic glaciology glacier calving glacier flow remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article ftdoajarticles https://doi.org/10.1017/jog.2023.59 2023-08-20T00:35:49Z To investigate the mechanisms driving recent changes in outlet glaciers in Antarctica, we measured the glacier front position, flow velocity and surface elevation of five outlet glaciers flowing into Lützow-Holm Bay in East Antarctica. After a steady advance from 2008 to 2015, all the glaciers synchronously retreated by 0.4–6.0 km between 2016 and 2018. The initiation of the retreat coincided with the breakup of land-fast sea ice in Lützow-Holm Bay in 2016, which resulted in the largest sea-ice loss in the region since 1998. Similar flow variations and surface elevation changes were observed near the grounding line of Shirase, Skallen and Telen glaciers. The slowdown in 2011–15 (by 13%) and the speedup in 2016–18 (by 7%) coincided with the respective increase and decrease in surface elevation. Simultaneous retreat and acceleration after the land-fast sea-ice breakup implies that sea ice has a significant influence on glacier dynamics. Thickening/thinning observed near the grounding line was attributed to a reduced/enhanced stretching flow regime during the deceleration/acceleration period. Our results demonstrate that land-fast sea ice affects not only terminus positions, but also the flow speed and ice thickness of the Antarctic glaciers. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Journal of Glaciology Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic East Antarctica Lützow-Holm Bay ENVELOPE(38.000,38.000,-69.500,-69.500) Skallen ENVELOPE(39.467,39.467,-69.650,-69.650) Telen ENVELOPE(39.700,39.700,-69.633,-69.633) The Antarctic Journal of Glaciology 1 13 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic glaciology glacier calving glacier flow remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Antarctic glaciology glacier calving glacier flow remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Ken Kondo Shin Sugiyama Calving, ice flow, and thickness of outlet glaciers controlled by land-fast sea ice in Lützow-Holm Bay, East Antarctica |
topic_facet |
Antarctic glaciology glacier calving glacier flow remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
To investigate the mechanisms driving recent changes in outlet glaciers in Antarctica, we measured the glacier front position, flow velocity and surface elevation of five outlet glaciers flowing into Lützow-Holm Bay in East Antarctica. After a steady advance from 2008 to 2015, all the glaciers synchronously retreated by 0.4–6.0 km between 2016 and 2018. The initiation of the retreat coincided with the breakup of land-fast sea ice in Lützow-Holm Bay in 2016, which resulted in the largest sea-ice loss in the region since 1998. Similar flow variations and surface elevation changes were observed near the grounding line of Shirase, Skallen and Telen glaciers. The slowdown in 2011–15 (by 13%) and the speedup in 2016–18 (by 7%) coincided with the respective increase and decrease in surface elevation. Simultaneous retreat and acceleration after the land-fast sea-ice breakup implies that sea ice has a significant influence on glacier dynamics. Thickening/thinning observed near the grounding line was attributed to a reduced/enhanced stretching flow regime during the deceleration/acceleration period. Our results demonstrate that land-fast sea ice affects not only terminus positions, but also the flow speed and ice thickness of the Antarctic glaciers. |
format |
Article in Journal/Newspaper |
author |
Ken Kondo Shin Sugiyama |
author_facet |
Ken Kondo Shin Sugiyama |
author_sort |
Ken Kondo |
title |
Calving, ice flow, and thickness of outlet glaciers controlled by land-fast sea ice in Lützow-Holm Bay, East Antarctica |
title_short |
Calving, ice flow, and thickness of outlet glaciers controlled by land-fast sea ice in Lützow-Holm Bay, East Antarctica |
title_full |
Calving, ice flow, and thickness of outlet glaciers controlled by land-fast sea ice in Lützow-Holm Bay, East Antarctica |
title_fullStr |
Calving, ice flow, and thickness of outlet glaciers controlled by land-fast sea ice in Lützow-Holm Bay, East Antarctica |
title_full_unstemmed |
Calving, ice flow, and thickness of outlet glaciers controlled by land-fast sea ice in Lützow-Holm Bay, East Antarctica |
title_sort |
calving, ice flow, and thickness of outlet glaciers controlled by land-fast sea ice in lützow-holm bay, east antarctica |
publisher |
Cambridge University Press |
url |
https://doi.org/10.1017/jog.2023.59 https://doaj.org/article/b468552ba998423db3c2ccb68c6ad260 |
long_lat |
ENVELOPE(38.000,38.000,-69.500,-69.500) ENVELOPE(39.467,39.467,-69.650,-69.650) ENVELOPE(39.700,39.700,-69.633,-69.633) |
geographic |
Antarctic East Antarctica Lützow-Holm Bay Skallen Telen The Antarctic |
geographic_facet |
Antarctic East Antarctica Lützow-Holm Bay Skallen Telen The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica Journal of Glaciology Sea ice |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Journal of Glaciology Sea ice |
op_source |
Journal of Glaciology, Pp 1-13 |
op_relation |
https://www.cambridge.org/core/product/identifier/S002214302300059X/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2023.59 0022-1430 1727-5652 https://doaj.org/article/b468552ba998423db3c2ccb68c6ad260 |
op_doi |
https://doi.org/10.1017/jog.2023.59 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
13 |
_version_ |
1776205113770115072 |