气候变化领域集成服务门户(CCPortal): Antarctic sea-ice expansion and Southern Ocean cooling linked to tropical variability

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DOI	10.1038/s41558-022-01339-z
	Antarctic sea-ice expansion and Southern Ocean cooling linked to tropical variability
	Chung E.-S.; Kim S.-J.; Timmermann A.; Ha K.-J.; Lee S.-K.; Stuecker M.F.; Rodgers K.B.; Lee S.-S.; Huang L.
发表日期	2022
ISSN	1758-678X
起始页码	461
结束页码	468
卷号	12 期号:5
英文摘要	A variety of hypotheses, involving sub-ice-shelf melting, stratospheric ozone depletion and tropical teleconnections, have been proposed to explain the observed Antarctic sea-ice expansion over the period of continuous satellite monitoring and corresponding model–observation discrepancy, but the issue remains unresolved. Here, by comparing multiple large ensembles of model simulations with available observations, we show that Antarctic sea ice has expanded due to ocean surface cooling associated with multidecadal variability in the Southern Ocean that temporarily outweighs the opposing forced response. In both observations and model simulations, Southern Ocean multidecadal variability is closely linked to internal variability in the tropics, especially in the Pacific, via atmospheric teleconnections. The linkages are, however, distinctly weaker in simulations than in observations, accompanied by a marked model–observation mismatch in global warming resulting from potential model bias in the forced response and observed tropical variability. Thus, the forced response dominates in simulations, resulting in apparent model–observation discrepancy. © 2022, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	cooling; environmental monitoring; global warming; ozone depletion; satellite altimetry; sea ice; sea surface; Pacific Ocean; Southern Ocean
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/256697
作者单位	Division of Atmospheric Sciences, Korea Polar Research Institute, Incheon, South Korea; Center for Climate Physics, Institute for Basic Science, Busan, South Korea; Pusan National University, Busan, South Korea; Department of Climate System, Pusan National University, Busan, South Korea; BK21 School of Earth and Environmental Systems, Pusan National University, Busan, South Korea; Atlantic Oceanographic and Meteorological Laboratory, NOAA, Miami, FL, United States; Department of Oceanography and International Pacific Research Center, School of Ocean and Earth Science and Technology, University of Hawaiʻi at Mānoa, Honolulu, HI, United States
推荐引用方式 GB/T 7714	Chung E.-S.,Kim S.-J.,Timmermann A.,et al. Antarctic sea-ice expansion and Southern Ocean cooling linked to tropical variability[J],2022,12(5).
APA	Chung E.-S..,Kim S.-J..,Timmermann A..,Ha K.-J..,Lee S.-K..,...&Huang L..(2022).Antarctic sea-ice expansion and Southern Ocean cooling linked to tropical variability.Nature Climate Change,12(5).
MLA	Chung E.-S.,et al."Antarctic sea-ice expansion and Southern Ocean cooling linked to tropical variability".Nature Climate Change 12.5(2022).