Artemieva, N., Morgan, J. and Expedition 364 Science Party, (2017) Quantifying the release of climate-active gases by large meteorite impacts with a case study of Chicxulub. Geophysical Research Letters, 44(20), 10,180-10,188. (doi: 10.1002/2017GL074879)
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Abstract
Potentially hazardous asteroids and comets have hit Earth throughout its history, with catastrophic consequences in the case of the Chicxulub impact. Here we reexamine one of the mechanisms that allow an impact to have a global effect—the release of climate-active gases from sedimentary rocks. We use the SOVA hydrocode and model ejected materials for a sufficient time after impact to quantify the volume of gases that reach high enough altitudes (> 25 km) to have global consequences. We vary impact angle, sediment thickness and porosity, water depth, and shock pressure for devolatilization and present the results in a dimensionless form so that the released gases can be estimated for any impact into a sedimentary target. Using new constraints on the Chicxulub impact angle and target composition, we estimate that 325 ± 130 Gt of sulfur and 425 ± 160 Gt CO2 were ejected and produced severe changes to the global climate.
Item Type: | Articles |
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Additional Information: | A.E. Pickersgill is a member of the Expedition 364 Science Party. |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Pickersgill, Dr Annemarie |
Authors: | Artemieva, N., Morgan, J., and Expedition 364 Science Party, |
College/School: | College of Science and Engineering > School of Geographical and Earth Sciences College of Science and Engineering > Scottish Universities Environmental Research Centre |
Journal Name: | Geophysical Research Letters |
Publisher: | American Geophysical Union |
ISSN: | 0094-8276 |
ISSN (Online): | 1944-8007 |
Published Online: | 28 October 2017 |
Copyright Holders: | Copyright © 2017 American Geophysical Union |
First Published: | First published in Geophysical Research Letters 44(20): 10,180-10,188 |
Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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