Snow-ice contribution to the structure of sea ice in the Amundsen Sea, Antarctica
The widespread occurrence of snow-ice formation on the pack ice plays a critical role in the mass balance of Antarctic sea ice. The stable isotope composition, ice texture and salinity of eight ice cores, obtained from the Amundsen Sea during the Oden Southern Ocean 2010/11 expedition from late Dece...
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Cambridge University Press
2020
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ftdoajarticles:oai:doaj.org/article:3a931fff1d3f448ba4479a4d4bce529a 2023-05-15T13:23:42+02:00 Snow-ice contribution to the structure of sea ice in the Amundsen Sea, Antarctica Lijun Tian Yongli Gao Blake Weissling Stephen F. Ackley 2020-12-01T00:00:00Z https://doi.org/10.1017/aog.2020.55 https://doaj.org/article/3a931fff1d3f448ba4479a4d4bce529a EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0260305520000555/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2020.55 0260-3055 1727-5644 https://doaj.org/article/3a931fff1d3f448ba4479a4d4bce529a Annals of Glaciology, Vol 61, Pp 369-378 (2020) Ice core mass-balance reconstruction sea ice sea-ice growth and decay snow and ice chemistry Meteorology. Climatology QC851-999 article 2020 ftdoajarticles https://doi.org/10.1017/aog.2020.55 2023-03-12T01:31:55Z The widespread occurrence of snow-ice formation on the pack ice plays a critical role in the mass balance of Antarctic sea ice. The stable isotope composition, ice texture and salinity of eight ice cores, obtained from the Amundsen Sea during the Oden Southern Ocean 2010/11 expedition from late December 2010 to January 2011, were investigated to illustrate the snow-ice growth process and its contribution to sea-ice development. Most previous research has utilized δ18O as an index tracer to determine the percentages of core length that contain meteoric water, i.e. snow ice. However, this standard practice of snow-ice identification might be biased due to normally low-resolution isotopic measurements and mixing/diffusion processes between the snow ice and underlying ice layers. Snow-ice contributions in these ice cores based instead on an updated isotope mixing model are also presented. Depth profiles of ice texture and salinity are described to serve as representations of the structures of these ice cores. Our isotope mixing model produced an average of 15.9% snow-ice contribution for pack ice in the Amundsen Sea, and meteoric water occupying 40% of snow-ice mass for all ice stations. These results are compared to previous investigations of snow-ice occurrence around Antarctica. Article in Journal/Newspaper Amundsen Sea Annals of Glaciology Antarc* Antarctic Antarctica ice core Sea ice Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean Amundsen Sea Annals of Glaciology 61 83 369 378 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ice core mass-balance reconstruction sea ice sea-ice growth and decay snow and ice chemistry Meteorology. Climatology QC851-999 |
spellingShingle |
Ice core mass-balance reconstruction sea ice sea-ice growth and decay snow and ice chemistry Meteorology. Climatology QC851-999 Lijun Tian Yongli Gao Blake Weissling Stephen F. Ackley Snow-ice contribution to the structure of sea ice in the Amundsen Sea, Antarctica |
topic_facet |
Ice core mass-balance reconstruction sea ice sea-ice growth and decay snow and ice chemistry Meteorology. Climatology QC851-999 |
description |
The widespread occurrence of snow-ice formation on the pack ice plays a critical role in the mass balance of Antarctic sea ice. The stable isotope composition, ice texture and salinity of eight ice cores, obtained from the Amundsen Sea during the Oden Southern Ocean 2010/11 expedition from late December 2010 to January 2011, were investigated to illustrate the snow-ice growth process and its contribution to sea-ice development. Most previous research has utilized δ18O as an index tracer to determine the percentages of core length that contain meteoric water, i.e. snow ice. However, this standard practice of snow-ice identification might be biased due to normally low-resolution isotopic measurements and mixing/diffusion processes between the snow ice and underlying ice layers. Snow-ice contributions in these ice cores based instead on an updated isotope mixing model are also presented. Depth profiles of ice texture and salinity are described to serve as representations of the structures of these ice cores. Our isotope mixing model produced an average of 15.9% snow-ice contribution for pack ice in the Amundsen Sea, and meteoric water occupying 40% of snow-ice mass for all ice stations. These results are compared to previous investigations of snow-ice occurrence around Antarctica. |
format |
Article in Journal/Newspaper |
author |
Lijun Tian Yongli Gao Blake Weissling Stephen F. Ackley |
author_facet |
Lijun Tian Yongli Gao Blake Weissling Stephen F. Ackley |
author_sort |
Lijun Tian |
title |
Snow-ice contribution to the structure of sea ice in the Amundsen Sea, Antarctica |
title_short |
Snow-ice contribution to the structure of sea ice in the Amundsen Sea, Antarctica |
title_full |
Snow-ice contribution to the structure of sea ice in the Amundsen Sea, Antarctica |
title_fullStr |
Snow-ice contribution to the structure of sea ice in the Amundsen Sea, Antarctica |
title_full_unstemmed |
Snow-ice contribution to the structure of sea ice in the Amundsen Sea, Antarctica |
title_sort |
snow-ice contribution to the structure of sea ice in the amundsen sea, antarctica |
publisher |
Cambridge University Press |
publishDate |
2020 |
url |
https://doi.org/10.1017/aog.2020.55 https://doaj.org/article/3a931fff1d3f448ba4479a4d4bce529a |
geographic |
Antarctic Southern Ocean Amundsen Sea |
geographic_facet |
Antarctic Southern Ocean Amundsen Sea |
genre |
Amundsen Sea Annals of Glaciology Antarc* Antarctic Antarctica ice core Sea ice Southern Ocean |
genre_facet |
Amundsen Sea Annals of Glaciology Antarc* Antarctic Antarctica ice core Sea ice Southern Ocean |
op_source |
Annals of Glaciology, Vol 61, Pp 369-378 (2020) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0260305520000555/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2020.55 0260-3055 1727-5644 https://doaj.org/article/3a931fff1d3f448ba4479a4d4bce529a |
op_doi |
https://doi.org/10.1017/aog.2020.55 |
container_title |
Annals of Glaciology |
container_volume |
61 |
container_issue |
83 |
container_start_page |
369 |
op_container_end_page |
378 |
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1766374282607198208 |