Projecten per jaar
Samenvatting
The Chicxulub asteroid impact event at the Cretaceous-Paleogene (K-Pg) boundary ~66 Myr ago is widely considered responsible for the mass extinction event leading to the demise of the non-avian dinosaurs. Short-term cooling due to massive release of climate-active agents is hypothesized to have been crucial, with S-bearing gases originating from the target rock vaporization considered an important driving force. Yet, the magnitude of the S release remains poorly constrained. Here we empirically estimate the amount of impact-released S relying on the concentration of S and its isotopic composition within the impact structure and a set of terrestrial K-Pg boundary ejecta sites. The average value of 67 ± 39 Gt obtained is ~5-fold lower than previous numerical estimates. The lower mass of S-released may indicate a less prominent role for S emission leading to a milder impact winter with key implications for species survival during the first years following the impact.
Originele taal-2 | English |
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Pagina's (van-tot) | 1-15 |
Aantal pagina's | 15 |
Tijdschrift | Nature communications |
Volume | 16 |
Nummer van het tijdschrift | 1 |
DOI's | |
Status | Published - 16 jan 2025 |
Bibliografische nota
© 2024. The Author(s).-
BASGO1: OZR Basisfinanciering voor Grote Onderzoeksgroepen - AMGC
1/01/24 → 31/12/29
Project: Fundamenteel
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OZR3911: Bilateral cooperation within the framework of a joint doctoral project: benchfee for joint PhD VUB - UGent, RODIOUCHKINA Katerina
3/12/21 → 2/12/25
Project: Fundamenteel
Uitrusting
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Micro-XRay Fluorescence Spectrometer
Philippe Claeys (Manager)
Archeologie, Milieuveranderingen, en Geo-ChemieUitrusting/faciliteit: no e-resource/single sited