Antarctic sea ice change based on a new sea ice dataset from 1992 to 2008
The sea ice concentration dataset (covering the period 1992-2008) used in this study is a new dataset based on the Sea Ice Climate Change Initiative (SICCI) algorithm. We investigate whether the SICCI dataset is on a par with other datasets for studying sea ice cover changes in the Southern Ocean. W...
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ftcaltechauth:oai:authors.library.caltech.edu:h0dy4-nmb05 2024-06-23T07:47:55+00:00 Antarctic sea ice change based on a new sea ice dataset from 1992 to 2008 He, Li-Yin Ke, Chang-Qing Zhou, Xiaobing Cui, Ya-Nan Shan, Liang 2016-12-28 https://doi.org/10.3354/cr01436 unknown Inter Research https://doi.org/10.3354/cr01436 oai:authors.library.caltech.edu:h0dy4-nmb05 eprintid:75355 resolverid:CaltechAUTHORS:20170323-110135648 info:eu-repo/semantics/openAccess Other Climate Research, 71(2), 155-169, (2016-12-28) SICCI algorithm Sea ice extent Sea ice area Sea surface temperature Antarctica info:eu-repo/semantics/article 2016 ftcaltechauth https://doi.org/10.3354/cr01436 2024-06-12T06:19:42Z The sea ice concentration dataset (covering the period 1992-2008) used in this study is a new dataset based on the Sea Ice Climate Change Initiative (SICCI) algorithm. We investigate whether the SICCI dataset is on a par with other datasets for studying sea ice cover changes in the Southern Ocean. We then examine spatiotemporal variations in sea ice derived from the SICCI dataset over the Southern Ocean, and analyse relationships of sea ice with sea surface temperature (SST). The results indicate that there is no significant difference between the SICCI dataset and the NASA Team dataset, and therefore the former can also be used for studying sea ice changes. Both sea ice extent (SIE) and sea ice area (SIA) derived from the SICCI dataset over the Southern Ocean increased slightly from 1992 to 2008, at rates of (17.75 ± 11.50) × 10^3 and (17.37 ± 9.51) × 10^3 km^2 yr^(–1), respectively. Antarctic sea ice has significant seasonal variations; all seasonally averaged SIE and SIA show an increase, with spring showing the largest positive changing rate. The Weddell Sea, Ross Sea, and Indian Ocean have positive yearly changing rates in SIE and SIA, while the Bellingshausen/Amundsen seas and western Pacific Ocean have negative yearly changing rates. However, overall sea ice over the Southern Ocean has a slight positive trend, which is the same as the sea ice change pattern derived from the NASA Team dataset. This indicates that the contributions to the change in sea ice over the whole Southern Ocean due to the Weddell Sea, Ross Sea, and Indian Ocean dominate over those by the Bellingshausen/Amundsen seas and western Pacific Ocean. Further analysis shows that both SIE and SIA are negatively correlated with SST in the Southern Ocean or each of the 5 longitudinal sectors, and sea ice is more sensitive to SST in spring and autumn. © 2016 Inter-Research. Online publication date: December 28, 2016. Supplemental Material - c071p155_supp.pdf Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Sea ice Southern Ocean Weddell Sea Caltech Authors (California Institute of Technology) Antarctic Indian Pacific Ross Sea Southern Ocean Weddell Weddell Sea Climate Research 71 2 155 169 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
topic |
SICCI algorithm Sea ice extent Sea ice area Sea surface temperature Antarctica |
spellingShingle |
SICCI algorithm Sea ice extent Sea ice area Sea surface temperature Antarctica He, Li-Yin Ke, Chang-Qing Zhou, Xiaobing Cui, Ya-Nan Shan, Liang Antarctic sea ice change based on a new sea ice dataset from 1992 to 2008 |
topic_facet |
SICCI algorithm Sea ice extent Sea ice area Sea surface temperature Antarctica |
description |
The sea ice concentration dataset (covering the period 1992-2008) used in this study is a new dataset based on the Sea Ice Climate Change Initiative (SICCI) algorithm. We investigate whether the SICCI dataset is on a par with other datasets for studying sea ice cover changes in the Southern Ocean. We then examine spatiotemporal variations in sea ice derived from the SICCI dataset over the Southern Ocean, and analyse relationships of sea ice with sea surface temperature (SST). The results indicate that there is no significant difference between the SICCI dataset and the NASA Team dataset, and therefore the former can also be used for studying sea ice changes. Both sea ice extent (SIE) and sea ice area (SIA) derived from the SICCI dataset over the Southern Ocean increased slightly from 1992 to 2008, at rates of (17.75 ± 11.50) × 10^3 and (17.37 ± 9.51) × 10^3 km^2 yr^(–1), respectively. Antarctic sea ice has significant seasonal variations; all seasonally averaged SIE and SIA show an increase, with spring showing the largest positive changing rate. The Weddell Sea, Ross Sea, and Indian Ocean have positive yearly changing rates in SIE and SIA, while the Bellingshausen/Amundsen seas and western Pacific Ocean have negative yearly changing rates. However, overall sea ice over the Southern Ocean has a slight positive trend, which is the same as the sea ice change pattern derived from the NASA Team dataset. This indicates that the contributions to the change in sea ice over the whole Southern Ocean due to the Weddell Sea, Ross Sea, and Indian Ocean dominate over those by the Bellingshausen/Amundsen seas and western Pacific Ocean. Further analysis shows that both SIE and SIA are negatively correlated with SST in the Southern Ocean or each of the 5 longitudinal sectors, and sea ice is more sensitive to SST in spring and autumn. © 2016 Inter-Research. Online publication date: December 28, 2016. Supplemental Material - c071p155_supp.pdf |
format |
Article in Journal/Newspaper |
author |
He, Li-Yin Ke, Chang-Qing Zhou, Xiaobing Cui, Ya-Nan Shan, Liang |
author_facet |
He, Li-Yin Ke, Chang-Qing Zhou, Xiaobing Cui, Ya-Nan Shan, Liang |
author_sort |
He, Li-Yin |
title |
Antarctic sea ice change based on a new sea ice dataset from 1992 to 2008 |
title_short |
Antarctic sea ice change based on a new sea ice dataset from 1992 to 2008 |
title_full |
Antarctic sea ice change based on a new sea ice dataset from 1992 to 2008 |
title_fullStr |
Antarctic sea ice change based on a new sea ice dataset from 1992 to 2008 |
title_full_unstemmed |
Antarctic sea ice change based on a new sea ice dataset from 1992 to 2008 |
title_sort |
antarctic sea ice change based on a new sea ice dataset from 1992 to 2008 |
publisher |
Inter Research |
publishDate |
2016 |
url |
https://doi.org/10.3354/cr01436 |
geographic |
Antarctic Indian Pacific Ross Sea Southern Ocean Weddell Weddell Sea |
geographic_facet |
Antarctic Indian Pacific Ross Sea Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica Ross Sea Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Sea ice Southern Ocean Weddell Sea |
op_source |
Climate Research, 71(2), 155-169, (2016-12-28) |
op_relation |
https://doi.org/10.3354/cr01436 oai:authors.library.caltech.edu:h0dy4-nmb05 eprintid:75355 resolverid:CaltechAUTHORS:20170323-110135648 |
op_rights |
info:eu-repo/semantics/openAccess Other |
op_doi |
https://doi.org/10.3354/cr01436 |
container_title |
Climate Research |
container_volume |
71 |
container_issue |
2 |
container_start_page |
155 |
op_container_end_page |
169 |
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1802638166921838592 |