Phillip E Jardine
Response to Comment on "Dying in the Sun: Direct evidence for elevated UV-B radiation at the end-Permian mass extinction"
Jardine, Phillip E; Peng, Huiping; Marshall, John E A; Lomax, Barry H; Bomfleur, Benjamin; Kent, Matthew S; Fraser, Wesley T; Liu, Feng
Authors
Huiping Peng
John E A Marshall
Barry H Lomax
Benjamin Bomfleur
MATTHEW KENT Matthew.Kent@nottingham.ac.uk
Research Fellow
Wesley T Fraser
Feng Liu
Abstract
Seddon and Zimmermann have raised questions about the evidence for increased UV-B flux across the end-Permian mass extinction (EPME) that was presented in our recent study, specifically regarding the measurement of UV-B-absorbing compound (UAC) levels in fossil pollen. We respond to these points, arguing that the comparison of FTIR spectra of >250 million-year-old Permian fossil pollen with ~700-year-old subfossil pollen is not valid and that negligible nonrandom interference derived from water vapor fluctuations during data generation cannot coincidentally produce a substantial UAC peak during the EPME. Furthermore, we refute the suggestion that the measured aromatic peak at 1600 cm-1 could have been influenced by diagenetic products from other organic constituents of pollen. The most productive route forward will be to generate sporomorph geochemical data from additional Permian-Triassic boundary sections to test the results put forward in our study.
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 25, 2023 |
Online Publication Date | Aug 25, 2023 |
Publication Date | Aug 25, 2023 |
Deposit Date | Sep 4, 2023 |
Publicly Available Date | Sep 11, 2023 |
Journal | Science Advances |
Electronic ISSN | 2375-2548 |
Publisher | American Association for the Advancement of Science (AAAS) |
Peer Reviewed | Not Peer Reviewed |
Volume | 9 |
Issue | 34 |
Article Number | eadj6309 |
DOI | https://doi.org/10.1126/sciadv.adj6309 |
Keywords | Ultraviolet Rays, Extinction, Biological, Fossils, Ethers |
Public URL | https://nottingham-repository.worktribe.com/output/24870057 |
Publisher URL | https://www.science.org/doi/10.1126/sciadv.adj6309 |
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Response to Comment on “Dying in the Sun: Direct evidence for elevated UV-B radiation at the end-Permian mass extinction”
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https://creativecommons.org/licenses/by/4.0/
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