Cosmic-Impact Event in Lake Sediments from Central Europe Postdates the Laacher See Eruption and Marks Onset of the Younger Dryas

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10386245" target="_blank" >RIV/00216208:11310/18:10386245 - isvavai.cz</a>

Alternative codes found

RIV/60077344:_____/18:00493827 RIV/67985939:_____/18:00493827 RIV/67985530:_____/18:00493827 RIV/67985831:_____/18:00493827 RIV/00020711:_____/18:00004644

Result on the web

<a href="https://doi.org/10.1086/699869" target="_blank" >https://doi.org/10.1086/699869</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1086/699869" target="_blank" >10.1086/699869</a>

Result language

angličtina

Original language name

Cosmic-Impact Event in Lake Sediments from Central Europe Postdates the Laacher See Eruption and Marks Onset of the Younger Dryas

Original language description

The Younger Dryas (YD) climate episode (similar to 12,850-11,650 calendar years before present [cal BP]) is an event recorded widely across the Northern Hemisphere. We conducted multiple analyses at high resolution of a YD-age sedimentary sequence from Stara Jimka, a paleolake in the Bohemian Forest, Czech Republic. Age-depth modeling indicates that a central European warming trend was interrupted at similar to 13,020 +/- 110 cal BP by the sudden onset of cooling (&lt;20 y) known as the Gerzensee climate oscillation and marked by the deposition of fine-grained sediment at this location. That cooling episode ended at similar to 13,001 +/- 66 cal BP and was followed by a similar to 121-y-long warming trend. After that, the Laacher See tephra depositional event, dating to similar to 12,820 +/- 20 cal BP, continued an overall warming trend. The composition of Laacher See volcanic tephra in this section likely corresponds to the middle eruption sequence. Finally, the deposition of glassy microspherules marked the onset of the YD climate change at 12,755 +/- 92 cal BP. The sequence across the YD onset is marked by (1) a peak in glassy microspherules (117,000/kg), (2) a peak in framboidal spherules (14,000/kg), (3) significant changes in the lake&apos;s weathering proxies, and (4) major changes in fauna and flora, showing a shift to unfavorable environmental conditions (decrease in temperature and lake trophy status). Collectively, this evidence is consistent with the YD impact hypothesis and evidence of one or more cosmic airburst events occurring at this time.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Geology

ISSN

0022-1376

e-ISSN

—

Volume of the periodical

126

Issue of the periodical within the volume

6

Country of publishing house

US - UNITED STATES

Number of pages

15

Pages from-to

561-575

UT code for WoS article

000449866400001

EID of the result in the Scopus database

2-s2.0-85055477893