| DOI: | 10.1016/j.earscirev.2021.103677
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| 论文题名: | The Younger Dryas impact hypothesis: Review of the impact evidence |
| 作者: | Sweatman M.B.
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| 刊名: | Earth Science Reviews
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| ISSN: | 00128252
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| 出版年: | 2021
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| 卷: | 218 | | 语种: | 英语
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| 中文关键词: | Climate change
; Clovis culture
; Cosmic impact
; Impact microspherules
; Megafaunal extinctions
; Nanodiamonds
; Platinum anomaly
; Younger Dryas
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| 英文关键词: | climate change
; culture
; diamond
; extinction
; paleoclimate
; platinum
; spherule
; Younger Dryas
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| 英文摘要: | Firestone et al., 2007, PNAS 104(41): 16,016–16,021, proposed that a major cosmic impact, circa 10,835 cal. BCE, triggered the Younger Dryas (YD) climate shift along with changes in human cultures and megafaunal extinctions. Fourteen years after this initial work the overwhelming consensus of research undertaken by many independent groups, reviewed here, suggests their claims of a major cosmic impact at this time should be accepted. Evidence is mainly in the form of geochemical signals at what is known as the YD boundary found across at least four continents, especially North America and Greenland, such as excess platinum, quench-melted materials, and nanodiamonds. Their other claims are not yet confirmed, but the scale of the event, including extensive wildfires, and its very close timing with the onset of dramatic YD cooling suggest they are plausible and should be researched further. Notably, arguments by a small cohort of researchers against their claims of a major impact are, in general, poorly constructed, and under close scrutiny most of their evidence can actually be interpreted as supporting the impact hypothesis. © 2021 Elsevier B.V. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/166516
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| Appears in Collections: | 气候变化与战略
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作者单位: | Institute of Materials and Processes, School of Engineering, University of Edinburgh, King's BuildingsEH9 3FB, United Kingdom
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| Recommended Citation: | |
Sweatman M.B.. The Younger Dryas impact hypothesis: Review of the impact evidence[J]. Earth Science Reviews,2021-01-01,218
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