Observing the disintegration of the A68A iceberg from space
Icebergs impact the physical and biological properties of the ocean where they drift, depending on the degree of melting. We use satellite imagery and altimetry to quantify the area, thickness, and volume change of the massive A68A iceberg from its calving off the Larsen-C Ice Shelf in July 2017 unt...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:10142207 2023-12-24T10:17:39+01:00 Observing the disintegration of the A68A iceberg from space Braakmann-Folgmann, A Shepherd, A Gerrish, L Izzard, J Ridout, A 2022-03-01 text https://discovery.ucl.ac.uk/id/eprint/10142207/1/Ridout_1-s2.0-S0034425721005757-main.pdf https://discovery.ucl.ac.uk/id/eprint/10142207/ eng eng https://discovery.ucl.ac.uk/id/eprint/10142207/1/Ridout_1-s2.0-S0034425721005757-main.pdf https://discovery.ucl.ac.uk/id/eprint/10142207/ open Remote Sensing of Environment , 270 , Article 112855. (2022) Tabular icebergs Basal melting Satellite altimetry ICESat-2 CryoSat-2 Freshwater flux Mass loss South Georgia A68 Article 2022 ftucl 2023-11-27T13:07:32Z Icebergs impact the physical and biological properties of the ocean where they drift, depending on the degree of melting. We use satellite imagery and altimetry to quantify the area, thickness, and volume change of the massive A68A iceberg from its calving off the Larsen-C Ice Shelf in July 2017 until January 2021, when it disintegrated. A68A thinned from 235 ± 9 to 168 ± 10 m, on average, and lost 802 ± 34 Gt of ice in 3.5 years, 254 ± 17 Gt of which was through basal melting (a lower bound for the immediate fresh water input into the ocean). Basal melting peaked at 7.2 ± 2.3 m/month in the Northern Scotia Sea and an estimated 152 ± 61 Gt of freshwater was released off South Georgia, potentially altering the local ocean properties, plankton occurrence and conditions for predators. Article in Journal/Newspaper Ice Shelf Scotia Sea University College London: UCL Discovery Scotia Sea |
institution |
Open Polar |
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University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
Tabular icebergs Basal melting Satellite altimetry ICESat-2 CryoSat-2 Freshwater flux Mass loss South Georgia A68 |
spellingShingle |
Tabular icebergs Basal melting Satellite altimetry ICESat-2 CryoSat-2 Freshwater flux Mass loss South Georgia A68 Braakmann-Folgmann, A Shepherd, A Gerrish, L Izzard, J Ridout, A Observing the disintegration of the A68A iceberg from space |
topic_facet |
Tabular icebergs Basal melting Satellite altimetry ICESat-2 CryoSat-2 Freshwater flux Mass loss South Georgia A68 |
description |
Icebergs impact the physical and biological properties of the ocean where they drift, depending on the degree of melting. We use satellite imagery and altimetry to quantify the area, thickness, and volume change of the massive A68A iceberg from its calving off the Larsen-C Ice Shelf in July 2017 until January 2021, when it disintegrated. A68A thinned from 235 ± 9 to 168 ± 10 m, on average, and lost 802 ± 34 Gt of ice in 3.5 years, 254 ± 17 Gt of which was through basal melting (a lower bound for the immediate fresh water input into the ocean). Basal melting peaked at 7.2 ± 2.3 m/month in the Northern Scotia Sea and an estimated 152 ± 61 Gt of freshwater was released off South Georgia, potentially altering the local ocean properties, plankton occurrence and conditions for predators. |
format |
Article in Journal/Newspaper |
author |
Braakmann-Folgmann, A Shepherd, A Gerrish, L Izzard, J Ridout, A |
author_facet |
Braakmann-Folgmann, A Shepherd, A Gerrish, L Izzard, J Ridout, A |
author_sort |
Braakmann-Folgmann, A |
title |
Observing the disintegration of the A68A iceberg from space |
title_short |
Observing the disintegration of the A68A iceberg from space |
title_full |
Observing the disintegration of the A68A iceberg from space |
title_fullStr |
Observing the disintegration of the A68A iceberg from space |
title_full_unstemmed |
Observing the disintegration of the A68A iceberg from space |
title_sort |
observing the disintegration of the a68a iceberg from space |
publishDate |
2022 |
url |
https://discovery.ucl.ac.uk/id/eprint/10142207/1/Ridout_1-s2.0-S0034425721005757-main.pdf https://discovery.ucl.ac.uk/id/eprint/10142207/ |
geographic |
Scotia Sea |
geographic_facet |
Scotia Sea |
genre |
Ice Shelf Scotia Sea |
genre_facet |
Ice Shelf Scotia Sea |
op_source |
Remote Sensing of Environment , 270 , Article 112855. (2022) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/10142207/1/Ridout_1-s2.0-S0034425721005757-main.pdf https://discovery.ucl.ac.uk/id/eprint/10142207/ |
op_rights |
open |
_version_ |
1786205924983046144 |