气候变化领域集成服务门户(CCPortal): Multi-decadal trends in Antarctic sea-ice extent driven by ENSO

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DOI	10.1038/s41561-021-00697-1
	Multi-decadal trends in Antarctic sea-ice extent driven by ENSO–SAM over the last 2,000 years
	Crosta X.; Etourneau J.; Orme L.C.; Dalaiden Q.; Campagne P.; Swingedouw D.; Goosse H.; Massé G.; Miettinen A.; McKay R.M.; Dunbar R.B.; Escutia C.; Ikehara M.
发表日期	2021
ISSN	17520894
起始页码	156
结束页码	160
卷号	14 期号:3
英文摘要	Antarctic sea ice has paradoxically become more extensive over the past four decades despite a warming climate. The regional expression of this trend has been linked to changes in vertical redistribution of ocean heat and large-scale wind-field shifts. However, the short length of modern observations has hindered attempts to attribute this trend to anthropogenic forcing or natural variability. Here, we present two new decadal-resolution records of sea ice and sea surface temperatures that document pervasive regional climate heterogeneity in Indian Antarctic sea-ice cover over the last 2,000 years. Data assimilation of our marine records in a climate model suggests that the reconstructed dichotomous regional conditions were driven by the multi-decadal variability of the El Niño Southern Oscillation and Southern Annular Mode (SAM). For example, during an El Niño/SAM– combination, the northward sea-ice transport was reduced while heat advection from the subtropics to the Southern Ocean increased, which resulted in reduced sea-ice extent in the Indian sector as sea ice was compacted along the Antarctic coast. Our results therefore indicate that natural variability is large in the Southern Ocean and suggest that it has played a crucial role in the recent sea-ice trends and their decadal variability in this region. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	advection; climate modeling; decadal variation; El Nino-Southern Oscillation; ice cover; regional climate; sea ice; sea surface temperature; trend analysis; vertical distribution; wind field; Southern Ocean
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206882
作者单位	Université de Bordeaux, CNRS, EPHE, UMR 5805 EPOC, Pessac, France; EPHE-PSL Research University, Paris, France; ICARUS, Department of Geography, Maynooth University, Maynooth, Ireland; Earth and Life Institute (ELI), Université catholique de Louvain (UCL), Louvain-La-Neuve, Belgium; LOCEAN, UMR CNRS/UPCM/IRD/MNHN 7159, Université Pierre et Marie Curie, Paris, France; Norwegian Polar Institute, Tromsø, Norway; Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand; School of Earth, Energy, and Environmental Sciences, Stanford University, Stanford, CA, United States; Andaluz Institute of Earth Sciences, CSIC-University of Granada, Granada, Spain; Center for Advanced Marine Core Research, Kochi University, Nankoku, Japan; Ecosystems and Environment Research Programme, University of Helsinki, Helsinki, Finland
推荐引用方式 GB/T 7714	Crosta X.,Etourneau J.,Orme L.C.,等. Multi-decadal trends in Antarctic sea-ice extent driven by ENSO–SAM over the last 2,000 years[J],2021,14(3).
APA	Crosta X..,Etourneau J..,Orme L.C..,Dalaiden Q..,Campagne P..,...&Ikehara M..(2021).Multi-decadal trends in Antarctic sea-ice extent driven by ENSO–SAM over the last 2,000 years.Nature Geoscience,14(3).
MLA	Crosta X.,et al."Multi-decadal trends in Antarctic sea-ice extent driven by ENSO–SAM over the last 2,000 years".Nature Geoscience 14.3(2021).