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DOI	10.1016/j.scib.2021.07.028
	Variability of Antarctic sea ice extent over the past 200 years
	Yang J.; Xiao C.; Liu J.; Li S.; Qin D.
发表日期	2021
卷号	66 期号:23
英文摘要	While Arctic sea ice has been decreasing in recent decades that is largely due to anthropogenic forcing, the extent of Antarctic sea ice showed a positive trend during 1979–2015, followed by an abrupt decrease. The shortness of the satellite record limits our ability to quantify the possible contribution of anthropogenic forcing and internal variability to the observed Antarctic sea ice variability. In this study, ice core and fast ice records with annual resolution from six sites are used to reconstruct the annual-resolved northernmost latitude of sea ice edge (NLSIE) for different sectors of the Southern Ocean, including the Weddell Sea (WS), Bellingshausen Sea (BS), Amundsen Sea (AS), Ross Sea (RS), and the Indian and western Pacific Ocean (IndWPac). The linear trends of the NLSIE are analyzed for each sector for the past 100–200 years and found to be −0.08°, −0.17°, +0.07°, +0.02°, and −0.03° per decade (≥95% confidence level) for the WS, BS, AS, RS, and IndWPac, respectively. For the entire Antarctic, our composite NLSIE shows a decreasing trend (−0.03° per decade, 99% confidence level) during the 20th century, with a rapid decline in the mid-1950s. It was not until the early 1980s that the observed increasing trend occurred. A comparison with major climate indices shows that the long-term linear trends in all five sectors are largely dominated by the changes in the Southern Annular Mode (SAM). The multi-decadal variability in WS, BS, and AS is dominated by the Interdecadal Pacific Oscillation, whereas that in the IndWPac and RS is dominated by the SAM. © 2021 Science China Press
英文关键词	Antarctic; Ice core; Interdecadal Pacific Oscillation; Sea ice; Southern Annular Mode
语种	英语
scopus关键词	Oceanography; Amundsen Sea; Antarctic; Antarctic sea ice; Ice core; Inter-decadal pacific oscillations; Ross Sea; Sea-ice edge; Southern Annular Mode; Weddell Sea; Western Pacific; Sea ice
来源期刊	Science Bulletin
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251217
作者单位	State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, 100875, China; Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY 12222, United States; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Yang J.,Xiao C.,Liu J.,et al. Variability of Antarctic sea ice extent over the past 200 years[J]. 中国科学院西北生态环境资源研究院,2021,66(23).
APA	Yang J.,Xiao C.,Liu J.,Li S.,&Qin D..(2021).Variability of Antarctic sea ice extent over the past 200 years.Science Bulletin,66(23).
MLA	Yang J.,et al."Variability of Antarctic sea ice extent over the past 200 years".Science Bulletin 66.23(2021).