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|a Atmospheric Carbon Injection Linked to End-Triassic Mass Extinction |h [electronic resource]. |
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|a [S.l.] : |b American Association for the Advancement of Science, |c 2011-07-22. |
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|a Science Magazine Volume 333. |
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|a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights. |
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|a The end-Triassic mass extinction (~201.4 million years ago), marked by terrestrial ecosystem turnover
and up to ~50% loss in marine biodiversity, has been attributed to intensified volcanic activity
during the break-up of Pangaea. Here, we present compound-specific carbon-isotope data of long-chain
n-alkanes derived from waxes of land plants, showing a ~8.5 per mil negative excursion, coincident
with the extinction interval. These data indicate strong carbon-13 depletion of the end-Triassic
atmosphere, within only 10,000 to 20,000 years. The magnitude and rate of this carbon-cycle disruption
can be explained by the injection of at least ~12 × 103 gigatons of isotopically depleted carbon
as methane into the atmosphere. Concurrent vegetation changes reflect strong warming and an
enhanced hydrological cycle. Hence, end-Triassic events are robustly linked to methane-derived massive
carbon release and associated climate change. |
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|a Electronic reproduction. |c Florida International University, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software. |
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|a Jaap S. Sinninghe Damste. |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15050336/00001 |y Click here for full text |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/05/03/36/00001/FI15050336_thm.jpg |
