气候变化领域集成服务门户(CCPortal): Multiple sources for tephra from AD 1259 volcanic signal in Antarctic ice cores

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DOI	10.1016/j.quascirev.2019.03.005
	Multiple sources for tephra from AD 1259 volcanic signal in Antarctic ice cores
	Narcisi B.; Petit J.R.; Delmonte B.; Batanova V.; Savarino J.
发表日期	2019
ISSN	0277-3791
起始页码	164
结束页码	174
卷号	210
英文摘要	Strong volcanic signals simultaneously recorded in polar ice sheets are commonly assigned to major low-latitude eruptions that dispersed large quantities of aerosols in the global atmosphere with the potential of inducing climate perturbations. Parent eruptions responsible for specific events are typically deduced from matching to a known volcanic eruption having coincidental date. However, more robust source linkage can be achieved only through geochemical characterisation of the airborne volcanic glass products (tephra) sometimes preserved in the polar strata. We analysed fine-grained tephra particles extracted from layers of the AD 1259 major bipolar volcanic signal in four East Antarctic ice cores drilled in different widely-spaced locations on the Antarctic Plateau. The very large database of glass-shard geochemistry combined with grain size analyses consistently indicate that the material was sourced from multiple distinct eruptions. These are the AD 1257 mega-eruption of Samalas volcano in Indonesia, recently proposed to be the single event responsible for the polar signal, as well as a newly-identified Antarctic eruption, which occurred in northern Victoria Land in AD 1259. Finally, a further eruption that took place somewhere outside of Antarctica has also contributed to tephra deposition. Our high-resolution, multiple-site approach was critical for revealing spatial heterogeneity of tephra at the continental scale. Evidence from ice-core tephra indicates recurrent explosive activity at the Antarctic volcanoes and could have implications for improved reconstruction of post-volcanic effects on climate from proxy polar records. © 2019 Elsevier Ltd
英文关键词	Antarctic rifting volcanism; Antarctica; Cryptotephra; Glass shard microanalysis; Ice cores; Samalas AD 1257 eruption; Volcanic isochron
语种	英语
scopus关键词	Geochemistry; Glacial geology; Glass; Volcanoes; Antarctic rifting volcanism; Antarctica; Cryptotephra; Glass shards; Ice core; Samalas AD 1257 eruption; Volcanic isochron; Ice; explosive volcanism; grain size; heterogeneity; ice core; igneous geochemistry; microstructure; rifting; tephra; volcanic eruption; volcanic glass; Antarctic Plateau; Antarctica; East Antarctica; Indonesia; Victoria Land
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151974
作者单位	ENEA, C.R., Casaccia, Roma, 00123, Italy; Univ. Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, Grenoble, 38000, France; Department of Earth and Environmental Sciences (DISAT), Univ. Milano-Bicocca, Piazza della Scienza, Milano, 20126, Italy; Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Grenoble, 38000, France
推荐引用方式 GB/T 7714	Narcisi B.,Petit J.R.,Delmonte B.,et al. Multiple sources for tephra from AD 1259 volcanic signal in Antarctic ice cores[J],2019,210.
APA	Narcisi B.,Petit J.R.,Delmonte B.,Batanova V.,&Savarino J..(2019).Multiple sources for tephra from AD 1259 volcanic signal in Antarctic ice cores.Quaternary Science Reviews,210.
MLA	Narcisi B.,et al."Multiple sources for tephra from AD 1259 volcanic signal in Antarctic ice cores".Quaternary Science Reviews 210(2019).