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Extraordinary Biomass-Burning Episode and Impact Winter Triggered by the Younger Dryas Cosmic Impact approximate to 12,800 Years Ago. 1. Ice Cores and Glaciers
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SYSNO ASEP 0488673 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Extraordinary Biomass-Burning Episode and Impact Winter Triggered by the Younger Dryas Cosmic Impact approximate to 12,800 Years Ago. 1. Ice Cores and Glaciers Author(s) Wolbach, W. S. (US)
Ballard, J. P. (US)
Mayewski, P. A. (US)
Adedeji, V. (US)
Bunch, T. E. (US)
Firestone, R. B. (US)
French, T. A. (US)
Howard, G. A. (US)
Israde-Alcántara, I. (MX)
Johnson, J. R. (US)
Kimbel, D. R. (US)
Kinzie, Ch. R. (US)
Kurbatov, A. (US)
Kletetschka, Günther (GLU-S) RID, SAI, ORCID
LeCompte, M. A. (US)
Mahaney, W. C. (CA)
Mellot, A. L. (US)
Maiorana-Boutilier, A. (US)
Mitra, S. (US)
Moore, Ch. R. (US)
Napier, W. M. (GB)
Parlier, J. (US)
Tankersley, K. B. (US)
Thomas, B. C. (US)
Wittke, J. H. (US)
West, A. (US)
Kennett, J. P. (US)Source Title Journal of Geology. - : University of Chicago Press - ISSN 0022-1376
Roč. 126, č. 2 (2018), s. 165-184Number of pages 20 s. Publication form Print - P Language eng - English Country US - United States Keywords biomass burning ; comet ; deposition ; ice core ; impact ; mass extinction ; paleoclimate ; paleoenvironment ; platinum ; trigger mechanism ; wildfire ; winter ; Younger Dryas Subject RIV DB - Geology ; Mineralogy OECD category Geology Institutional support GLU-S - RVO:67985831 UT WOS 000425530500002 EID SCOPUS 85042306672 DOI https://doi.org/10.1086/695703 Annotation The Younger Dryas boundary (YDB) cosmic-impact hypothesis is based on considerable evidence that Earth collided with fragments of a disintegrating 100-km-diameter comet, the remnants of which persist within the inner solar system approximate to 12,800 y later. Evidence suggests that the YDB cosmic impact triggered an impact winter and the subsequent Younger Dryas (YD) climate episode, biomass burning, late Pleistocene megafaunal extinctions, and human cultural shifts and population declines. The cosmic impact deposited anomalously high concentrations of platinum over much of the Northern Hemisphere, as recorded at 26 YDB sites at the YD onset, including the Greenland Ice Sheet Project 2 ice core, in which platinum deposition spans approximate to 21 y (approximate to 12,836-12,815 cal BP). The YD onset also exhibits increased dust concentrations, synchronous with the onset of a remarkably high peak in ammonium, a biomass-burning aerosol. In four ice-core sequences from Greenland, Antarctica, and Russia, similar anomalous peaks in other combustion aerosols occur, including nitrate, oxalate, acetate, and formate, reflecting one of the largest biomass-burning episodes in more than 120,000 y. In support of widespread wildfires, the perturbations in CO2 records from Taylor Glacier, Antarctica, suggest that biomass burning at the YD onset may have consumed approximate to 10 million km(2), or approximate to 9% of Earth's terrestrial biomass. The ice record is consistent with YDB impact theory that extensive impact-related biomass burning triggered the abrupt onset of an impact winter, which led, through climatic feedbacks, to the anomalous YD climate episode. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Tel.: 226 800 273 Year of Publishing 2019
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