Surface flooding of Antarctic summer sea ice
Abstract The surface flooding of Antarctic sea ice in summer covers 50% or more of the sea-ice area in the major summer ice packs, the western Weddell and the Bellingshausen-Amundsen Seas. Two CRREL ice mass-balance buoys were deployed on the Amundsen Sea pack in late December 2010 from the icebreak...
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crcambridgeupr:10.1017/aog.2020.22 2024-06-23T07:45:26+00:00 Surface flooding of Antarctic summer sea ice Ackley, S. F. Perovich, D. K. Maksym, T. Weissling, B. Xie, H. 2020 http://dx.doi.org/10.1017/aog.2020.22 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305520000221 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Annals of Glaciology volume 61, issue 82, page 117-126 ISSN 0260-3055 1727-5644 journal-article 2020 crcambridgeupr https://doi.org/10.1017/aog.2020.22 2024-06-05T04:04:14Z Abstract The surface flooding of Antarctic sea ice in summer covers 50% or more of the sea-ice area in the major summer ice packs, the western Weddell and the Bellingshausen-Amundsen Seas. Two CRREL ice mass-balance buoys were deployed on the Amundsen Sea pack in late December 2010 from the icebreaker Oden, bridging the summer period (January–February 2011). Temperature records from thermistors embedded vertically in the snow and ice showed progressive increases in the depth of the flooded layer (up to 0.3–0.35 m) on the ice cover during January and February. While the snow depth was relatively unchanged from accumulation (<10 cm), ice thickness decreased by up to a meter from bottom melting during this period. Contemporaneous with the high bottom melting, under-ice water temperatures up to 1°C above the freezing point were found. The high temperature arises from solar heating of the upper mixed layer which can occur when ice concentration in the local area falls and lower albedo ocean water is exposed to radiative heating. The higher proportion of snow ice found in the Amundsen Sea pack ice therefore results from both winter snowfall and summer ice bottom melt found here that can lead to extensive surface flooding. Article in Journal/Newspaper Amundsen Sea Annals of Glaciology Antarc* Antarctic oden Sea ice Cambridge University Press Antarctic Amundsen Sea Weddell Annals of Glaciology 61 82 117 126 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract The surface flooding of Antarctic sea ice in summer covers 50% or more of the sea-ice area in the major summer ice packs, the western Weddell and the Bellingshausen-Amundsen Seas. Two CRREL ice mass-balance buoys were deployed on the Amundsen Sea pack in late December 2010 from the icebreaker Oden, bridging the summer period (January–February 2011). Temperature records from thermistors embedded vertically in the snow and ice showed progressive increases in the depth of the flooded layer (up to 0.3–0.35 m) on the ice cover during January and February. While the snow depth was relatively unchanged from accumulation (<10 cm), ice thickness decreased by up to a meter from bottom melting during this period. Contemporaneous with the high bottom melting, under-ice water temperatures up to 1°C above the freezing point were found. The high temperature arises from solar heating of the upper mixed layer which can occur when ice concentration in the local area falls and lower albedo ocean water is exposed to radiative heating. The higher proportion of snow ice found in the Amundsen Sea pack ice therefore results from both winter snowfall and summer ice bottom melt found here that can lead to extensive surface flooding. |
format |
Article in Journal/Newspaper |
author |
Ackley, S. F. Perovich, D. K. Maksym, T. Weissling, B. Xie, H. |
spellingShingle |
Ackley, S. F. Perovich, D. K. Maksym, T. Weissling, B. Xie, H. Surface flooding of Antarctic summer sea ice |
author_facet |
Ackley, S. F. Perovich, D. K. Maksym, T. Weissling, B. Xie, H. |
author_sort |
Ackley, S. F. |
title |
Surface flooding of Antarctic summer sea ice |
title_short |
Surface flooding of Antarctic summer sea ice |
title_full |
Surface flooding of Antarctic summer sea ice |
title_fullStr |
Surface flooding of Antarctic summer sea ice |
title_full_unstemmed |
Surface flooding of Antarctic summer sea ice |
title_sort |
surface flooding of antarctic summer sea ice |
publisher |
Cambridge University Press (CUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1017/aog.2020.22 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305520000221 |
geographic |
Antarctic Amundsen Sea Weddell |
geographic_facet |
Antarctic Amundsen Sea Weddell |
genre |
Amundsen Sea Annals of Glaciology Antarc* Antarctic oden Sea ice |
genre_facet |
Amundsen Sea Annals of Glaciology Antarc* Antarctic oden Sea ice |
op_source |
Annals of Glaciology volume 61, issue 82, page 117-126 ISSN 0260-3055 1727-5644 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/aog.2020.22 |
container_title |
Annals of Glaciology |
container_volume |
61 |
container_issue |
82 |
container_start_page |
117 |
op_container_end_page |
126 |
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1802639723869503488 |