Imperial College London
Alternate

ProfessorJoannaMorgan

Faculty of Engineering, Department of Earth Science & Engineering

Emeritus Professor of Geophysics
 
 
 
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Contact

 

+44 (0)20 7594 6423j.v.morgan

 
 
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Location

 

1.46CRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Chiarenza:2020:10.1073/pnas.2006087117,
author = {Chiarenza, A and Farnsworth, A and Mannion, PD and Lunt, DJ and Valdes, P and Morgan, JV and Allison, PA},
doi = {10.1073/pnas.2006087117},
journal = {Proceedings of the National Academy of Sciences of USA},
pages = {17084--17093},
title = {Asteroid impact, not volcanism, caused the end-Cretaceous dinosaur extinction},
url = {http://dx.doi.org/10.1073/pnas.2006087117},
volume = {117},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The Cretaceous/Paleogene mass extinction, 66 Ma, included the demise of non-avian dinosaurs. Intense debate has focused on the relative roles of Deccan volcanism and the Chicxulub asteroid impact as kill mechanisms for this event. Here, we combine fossil-occurrence data with paleoclimate and habitat suitability models to evaluate dinosaur habitability in the wake of various asteroid impact and Deccan volcanism scenarios. Asteroid impact models generate a prolonged cold winter that suppresses potential global dinosaur habitats. Conversely, long-term forcing from Deccan volcanism (carbon dioxide [CO2]-induced warming) leads to increased habitat suitability. Short-term (aerosol cooling) volcanism still allows equatorial habitability. These results support the asteroid impact as the main driver of the non-avian dinosaur extinction. By contrast, induced warming from volcanism mitigated the most extreme effects of asteroid impact, potentially reducing the extinction severity.
AU  - Chiarenza,A
AU  - Farnsworth,A
AU  - Mannion,PD
AU  - Lunt,DJ
AU  - Valdes,P
AU  - Morgan,JV
AU  - Allison,PA
DO  - 10.1073/pnas.2006087117
EP  - 17093
PY  - 2020///
SN  - 0027-8424
SP  - 17084
TI  - Asteroid impact, not volcanism, caused the end-Cretaceous dinosaur extinction
T2  - Proceedings of the National Academy of Sciences of USA
UR  - http://dx.doi.org/10.1073/pnas.2006087117
UR  - https://www.pnas.org/content/117/29/17084
UR  - http://hdl.handle.net/10044/1/80488
VL  - 117
ER  -
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