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Antarctic sea ice change based on a new sea ice dataset from 1992 to 2008

He, Li-Yin and Ke, Chang-Qing and Zhou, Xiaobing and Cui, Ya-Nan and Shan, Liang (2016) Antarctic sea ice change based on a new sea ice dataset from 1992 to 2008. Climate Research, 71 (2). pp. 155-169. ISSN 0936-577X. http://resolver.caltech.edu/CaltechAUTHORS:20170323-110135648

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Abstract

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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.3354/cr01436 DOIArticle
http://www.int-res.com/abstracts/cr/v71/n2/p155-169/PublisherArticle
Additional Information:© 2016 Inter-Research. Online publication date: December 28, 2016.
Subject Keywords:SICCI algorithm; Sea ice extent; Sea ice area; Sea surface temperature; Antarctica
Record Number:CaltechAUTHORS:20170323-110135648
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170323-110135648
Official Citation:He LY, Ke CQ, Zhou X, Cui YN, Shan L (2016) Antarctic sea ice change based on a new sea ice dataset from 1992 to 2008. Clim Res 71:155-169. https://doi.org/10.3354/cr01436
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75355
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:23 Mar 2017 19:07
Last Modified:23 Mar 2017 19:07

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