DOI: 10.1016/j.quascirev.2019.03.005
Scopus记录号: 2-s2.0-85062839283
论文题名: Multiple sources for tephra from AD 1259 volcanic signal in Antarctic ice cores
作者: Narcisi B. ; Petit J.R. ; Delmonte B. ; Batanova V. ; Savarino J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2019
卷: 210 起始页码: 164
结束页码: 174
语种: 英语
英文关键词: Antarctic rifting volcanism
; Antarctica
; Cryptotephra
; Glass shard microanalysis
; Ice cores
; Samalas AD 1257 eruption
; Volcanic isochron
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
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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117337
Appears in Collections: 气候变化与战略
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Recommended Citation:
Narcisi B.,Petit J.R.,Delmonte B.,et al. Multiple sources for tephra from AD 1259 volcanic signal in Antarctic ice cores[J]. Quaternary Science Reviews,2019-01-01,210