Analysis of Antarctic Peninsula Glacier Frontal Ablation Rates with Respect to Iceberg Melt-Inferred Variability in Ocean Conditions
Marine-terminating glaciers on the Antarctic Peninsula (AP) have retreated, accelerated and thinned in response to climate change in recent decades. Ocean warming has been implicated as a trigger for these changes in glacier dynamics, yet little data exist near glacier termini to assess the role of...
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ftboisestateu:oai:scholarworks.boisestate.edu:geo_facpubs-1518 2023-11-12T04:06:51+01:00 Analysis of Antarctic Peninsula Glacier Frontal Ablation Rates with Respect to Iceberg Melt-Inferred Variability in Ocean Conditions Dryak, M. C. Enderlin, E. M. 2020-06-01T07:00:00Z application/pdf https://scholarworks.boisestate.edu/geo_facpubs/514 https://scholarworks.boisestate.edu/context/geo_facpubs/article/1518/viewcontent/Enderlin__Ellyn__2020__Analysis_of_Antarctic_Peninsula___PUB.pdf unknown ScholarWorks https://scholarworks.boisestate.edu/geo_facpubs/514 https://scholarworks.boisestate.edu/context/geo_facpubs/article/1518/viewcontent/Enderlin__Ellyn__2020__Analysis_of_Antarctic_Peninsula___PUB.pdf http://creativecommons.org/licenses/by/4.0/ Geosciences Faculty Publications and Presentations Antarctic glaciology glacier ablation phenomena icebergs melt – basal remote sensing Earth Sciences Glaciology text 2020 ftboisestateu 2023-10-20T00:12:49Z Marine-terminating glaciers on the Antarctic Peninsula (AP) have retreated, accelerated and thinned in response to climate change in recent decades. Ocean warming has been implicated as a trigger for these changes in glacier dynamics, yet little data exist near glacier termini to assess the role of ocean warming here. We use remotely-sensed iceberg melt rates seaward of two glaciers on the eastern and six glaciers on the western AP from 2013 to 2019 to explore connections between variations in ocean conditions and glacier frontal ablation. We find iceberg melt rates follow regional ocean temperature variations, with the highest melt rates (mean ≈ 10 cm d−1) at Cadman and Widdowson glaciers in the west and the lowest melt rates (mean ≈ 0.5 cm d−1) at Crane Glacier in the east. Near-coincident glacier frontal ablation rates from 2014 to 2018 vary from ~450 m a−1 at Edgeworth and Blanchard glaciers to ~3000 m a−1 at Seller Glacier, former Wordie Ice Shelf tributary. Variations in iceberg melt rates and glacier frontal ablation rates are significantly positively correlated around the AP (Spearman's ρ = 0.71, p-value = 0.003). We interpret this correlation as support for previous research suggesting submarine melting of glacier termini exerts control on glacier frontal dynamics around the AP. Text Antarc* Antarctic Antarctic Peninsula Crane Glacier Ice Shelf Iceberg* Wordie Ice Shelf Boise State University: Scholar Works Antarctic Antarctic Peninsula Blanchard ENVELOPE(-62.083,-62.083,-64.733,-64.733) Cadman ENVELOPE(-63.833,-63.833,-65.583,-65.583) Crane Glacier ENVELOPE(-62.714,-62.714,-65.393,-65.393) Seller Glacier ENVELOPE(-66.326,-66.326,-69.339,-69.339) The Antarctic Wordie ENVELOPE(-67.500,-67.500,-69.167,-69.167) Wordie Ice Shelf ENVELOPE(-67.750,-67.750,-69.250,-69.250) |
institution |
Open Polar |
collection |
Boise State University: Scholar Works |
op_collection_id |
ftboisestateu |
language |
unknown |
topic |
Antarctic glaciology glacier ablation phenomena icebergs melt – basal remote sensing Earth Sciences Glaciology |
spellingShingle |
Antarctic glaciology glacier ablation phenomena icebergs melt – basal remote sensing Earth Sciences Glaciology Dryak, M. C. Enderlin, E. M. Analysis of Antarctic Peninsula Glacier Frontal Ablation Rates with Respect to Iceberg Melt-Inferred Variability in Ocean Conditions |
topic_facet |
Antarctic glaciology glacier ablation phenomena icebergs melt – basal remote sensing Earth Sciences Glaciology |
description |
Marine-terminating glaciers on the Antarctic Peninsula (AP) have retreated, accelerated and thinned in response to climate change in recent decades. Ocean warming has been implicated as a trigger for these changes in glacier dynamics, yet little data exist near glacier termini to assess the role of ocean warming here. We use remotely-sensed iceberg melt rates seaward of two glaciers on the eastern and six glaciers on the western AP from 2013 to 2019 to explore connections between variations in ocean conditions and glacier frontal ablation. We find iceberg melt rates follow regional ocean temperature variations, with the highest melt rates (mean ≈ 10 cm d−1) at Cadman and Widdowson glaciers in the west and the lowest melt rates (mean ≈ 0.5 cm d−1) at Crane Glacier in the east. Near-coincident glacier frontal ablation rates from 2014 to 2018 vary from ~450 m a−1 at Edgeworth and Blanchard glaciers to ~3000 m a−1 at Seller Glacier, former Wordie Ice Shelf tributary. Variations in iceberg melt rates and glacier frontal ablation rates are significantly positively correlated around the AP (Spearman's ρ = 0.71, p-value = 0.003). We interpret this correlation as support for previous research suggesting submarine melting of glacier termini exerts control on glacier frontal dynamics around the AP. |
format |
Text |
author |
Dryak, M. C. Enderlin, E. M. |
author_facet |
Dryak, M. C. Enderlin, E. M. |
author_sort |
Dryak, M. C. |
title |
Analysis of Antarctic Peninsula Glacier Frontal Ablation Rates with Respect to Iceberg Melt-Inferred Variability in Ocean Conditions |
title_short |
Analysis of Antarctic Peninsula Glacier Frontal Ablation Rates with Respect to Iceberg Melt-Inferred Variability in Ocean Conditions |
title_full |
Analysis of Antarctic Peninsula Glacier Frontal Ablation Rates with Respect to Iceberg Melt-Inferred Variability in Ocean Conditions |
title_fullStr |
Analysis of Antarctic Peninsula Glacier Frontal Ablation Rates with Respect to Iceberg Melt-Inferred Variability in Ocean Conditions |
title_full_unstemmed |
Analysis of Antarctic Peninsula Glacier Frontal Ablation Rates with Respect to Iceberg Melt-Inferred Variability in Ocean Conditions |
title_sort |
analysis of antarctic peninsula glacier frontal ablation rates with respect to iceberg melt-inferred variability in ocean conditions |
publisher |
ScholarWorks |
publishDate |
2020 |
url |
https://scholarworks.boisestate.edu/geo_facpubs/514 https://scholarworks.boisestate.edu/context/geo_facpubs/article/1518/viewcontent/Enderlin__Ellyn__2020__Analysis_of_Antarctic_Peninsula___PUB.pdf |
long_lat |
ENVELOPE(-62.083,-62.083,-64.733,-64.733) ENVELOPE(-63.833,-63.833,-65.583,-65.583) ENVELOPE(-62.714,-62.714,-65.393,-65.393) ENVELOPE(-66.326,-66.326,-69.339,-69.339) ENVELOPE(-67.500,-67.500,-69.167,-69.167) ENVELOPE(-67.750,-67.750,-69.250,-69.250) |
geographic |
Antarctic Antarctic Peninsula Blanchard Cadman Crane Glacier Seller Glacier The Antarctic Wordie Wordie Ice Shelf |
geographic_facet |
Antarctic Antarctic Peninsula Blanchard Cadman Crane Glacier Seller Glacier The Antarctic Wordie Wordie Ice Shelf |
genre |
Antarc* Antarctic Antarctic Peninsula Crane Glacier Ice Shelf Iceberg* Wordie Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Crane Glacier Ice Shelf Iceberg* Wordie Ice Shelf |
op_source |
Geosciences Faculty Publications and Presentations |
op_relation |
https://scholarworks.boisestate.edu/geo_facpubs/514 https://scholarworks.boisestate.edu/context/geo_facpubs/article/1518/viewcontent/Enderlin__Ellyn__2020__Analysis_of_Antarctic_Peninsula___PUB.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
_version_ |
1782327792159948800 |