Impact of Fjord Geometry on Grounding Line Stability
Recent and past retreat of marine-terminating glaciers are broadly consistent with observed ocean warming, yet responses vary significantly within regions experiencing similar ocean conditions. We assess how fjord geometry modulates glacier response to a regional ocean warming on decadal to millenni...
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Online Access: | https://hdl.handle.net/1956/18160 https://doi.org/10.3389/feart.2018.00071 |
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ftunivbergen:oai:bora.uib.no:1956/18160 2023-05-15T16:41:59+02:00 Impact of Fjord Geometry on Grounding Line Stability Åkesson, Henning Nisancioglu, Kerim Hestnes Nick, Faezeh M. 2018-06-05 application/pdf https://hdl.handle.net/1956/18160 https://doi.org/10.3389/feart.2018.00071 eng eng Frontiers Deglaciation of the Norwegian fjords urn:issn:2296-6463 https://hdl.handle.net/1956/18160 https://doi.org/10.3389/feart.2018.00071 cristin:1589149 Attribution CC BY http://creativecommons.org/licenses/by/4.0 Copyright 2018 The Author(s) 71 Frontiers in Earth Science 6 grounding lines Fjords marine-terminating glaciers calving numerical modeling ice shelves moraines ocean warming Peer reviewed Journal article 2018 ftunivbergen https://doi.org/10.3389/feart.2018.00071 2023-03-14T17:40:00Z Recent and past retreat of marine-terminating glaciers are broadly consistent with observed ocean warming, yet responses vary significantly within regions experiencing similar ocean conditions. We assess how fjord geometry modulates glacier response to a regional ocean warming on decadal to millennial time scales, by using an idealized, numerical model of fast-flowing glaciers including a crevasse-depth calving criterion. Our simulations show that, given identical climate forcing, grounding line responses can differ by tens of kilometers due to variations in channel width. We identify fjord mouths and embayments as vulnerable geometries, showing that glaciers in these fjords are prone to rapid, irreversible retreat, independent of the presence of a fjord sill. This irreversible retreat has relevance for the potential future recovery of marine ice sheets, if the current anthropogenic warming is reduced, or reversed, as well as for the response of marine ice sheets to past climate states; including the warm Bølling-Allerød interstadial, the Younger Dryas cold reversal and the Little Ice Age. publishedVersion Article in Journal/Newspaper Ice Shelves University of Bergen: Bergen Open Research Archive (BORA-UiB) Frontiers in Earth Science 6 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
grounding lines Fjords marine-terminating glaciers calving numerical modeling ice shelves moraines ocean warming |
spellingShingle |
grounding lines Fjords marine-terminating glaciers calving numerical modeling ice shelves moraines ocean warming Åkesson, Henning Nisancioglu, Kerim Hestnes Nick, Faezeh M. Impact of Fjord Geometry on Grounding Line Stability |
topic_facet |
grounding lines Fjords marine-terminating glaciers calving numerical modeling ice shelves moraines ocean warming |
description |
Recent and past retreat of marine-terminating glaciers are broadly consistent with observed ocean warming, yet responses vary significantly within regions experiencing similar ocean conditions. We assess how fjord geometry modulates glacier response to a regional ocean warming on decadal to millennial time scales, by using an idealized, numerical model of fast-flowing glaciers including a crevasse-depth calving criterion. Our simulations show that, given identical climate forcing, grounding line responses can differ by tens of kilometers due to variations in channel width. We identify fjord mouths and embayments as vulnerable geometries, showing that glaciers in these fjords are prone to rapid, irreversible retreat, independent of the presence of a fjord sill. This irreversible retreat has relevance for the potential future recovery of marine ice sheets, if the current anthropogenic warming is reduced, or reversed, as well as for the response of marine ice sheets to past climate states; including the warm Bølling-Allerød interstadial, the Younger Dryas cold reversal and the Little Ice Age. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Åkesson, Henning Nisancioglu, Kerim Hestnes Nick, Faezeh M. |
author_facet |
Åkesson, Henning Nisancioglu, Kerim Hestnes Nick, Faezeh M. |
author_sort |
Åkesson, Henning |
title |
Impact of Fjord Geometry on Grounding Line Stability |
title_short |
Impact of Fjord Geometry on Grounding Line Stability |
title_full |
Impact of Fjord Geometry on Grounding Line Stability |
title_fullStr |
Impact of Fjord Geometry on Grounding Line Stability |
title_full_unstemmed |
Impact of Fjord Geometry on Grounding Line Stability |
title_sort |
impact of fjord geometry on grounding line stability |
publisher |
Frontiers |
publishDate |
2018 |
url |
https://hdl.handle.net/1956/18160 https://doi.org/10.3389/feart.2018.00071 |
genre |
Ice Shelves |
genre_facet |
Ice Shelves |
op_source |
71 Frontiers in Earth Science 6 |
op_relation |
Deglaciation of the Norwegian fjords urn:issn:2296-6463 https://hdl.handle.net/1956/18160 https://doi.org/10.3389/feart.2018.00071 cristin:1589149 |
op_rights |
Attribution CC BY http://creativecommons.org/licenses/by/4.0 Copyright 2018 The Author(s) |
op_doi |
https://doi.org/10.3389/feart.2018.00071 |
container_title |
Frontiers in Earth Science |
container_volume |
6 |
_version_ |
1766032447930105856 |