Academic Journal
Terrestrial evidence for volcanogenic sulfate-driven cooling event ~30 kyr before the Cretaceous-Paleogene mass extinction.
| العنوان: | Terrestrial evidence for volcanogenic sulfate-driven cooling event ~30 kyr before the Cretaceous-Paleogene mass extinction. |
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| المؤلفون: | O'Connor, Lauren K, Jerrett, Rhodri M, Price, Gregory D, Lyson, Tyler R, Lengger, Sabine K, Peterse, Francien, van Dongen, Bart E |
| المصدر: | Sci Adv ; ISSN:2375-2548 ; Volume:10 ; Issue:51 |
| بيانات النشر: | Atypon |
| سنة النشر: | 2024 |
| المجموعة: | PubMed Central (PMC) |
| الوصف: | Alongside the Chicxulub meteorite impact, Deccan volcanism is considered a primary trigger for the Cretaceous-Paleogene (K-Pg) mass extinction. Models suggest that volcanic outgassing of carbon and sulfur-potent environmental stressors-drove global temperature change, but the relative timing, duration, and magnitude of such change remains uncertain. Here, we use the organic paleothermometer MBT'5me and the carbon-isotope composition of two K-Pg-spanning lignites from the western Unites States, to test models of volcanogenic air temperature change in the ~100 kyr before the mass extinction. Our records show long-term warming of ~3°C, probably driven by Deccan CO2 emissions, and reveal a transient (<10 kyr) ~5°C cooling event, coinciding with the peak of the Poladpur "pulse" of Deccan eruption ~30 kyr before the K-Pg boundary. This cooling was likely caused by the aerosolization of volcanogenic sulfur. Temperatures returned to pre-event values before the mass extinction, suggesting that, from the terrestrial perspective, volcanogenic climate change was not the primary cause of K-Pg extinction. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | https://doi.org/10.1126/sciadv.ado5478; https://pubmed.ncbi.nlm.nih.gov/39693422; https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11654674/ |
| DOI: | 10.1126/sciadv.ado5478 |
| الاتاحة: | https://doi.org/10.1126/sciadv.ado5478 https://pubmed.ncbi.nlm.nih.gov/39693422 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11654674/ |
| رقم الانضمام: | edsbas.48CBAAC4 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1126/sciadv.ado5478 |
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