
Sylvain Richoz
Universitetslektor

Ocean acidification and the Permo-Triassic mass extinction
Författare
Summary, in English
Ocean acidification triggered by Siberian Trap volcanism was a possible kill mechanism for the Permo-Triassic Boundary mass extinction, but direct evidence for an acidification event is lacking. We present a high-resolution seawater pH record across this interval, using boron isotope data combined with a quantitative modeling approach. In the latest Permian, increased ocean alkalinity primed the Earth system with a low level of atmospheric CO2 and a high ocean buffering capacity. The first phase of extinction was coincident with a slow injection of carbon into the atmosphere, and ocean pH remained stable. During the second extinction pulse, however, a rapid and large injection of carbon caused an abrupt acidification event that drove the preferential loss of heavily calcified marine biota.
Publiceringsår
2015-04-10
Språk
Engelska
Sidor
229-232
Publikation/Tidskrift/Serie
Science
Volym
348
Issue
6231
Dokumenttyp
Artikel i tidskrift
Förlag
American Association for the Advancement of Science (AAAS)
Aktiv
Published
ISBN/ISSN/Övrigt
- ISSN: 0036-8075