Marine siliceous ecosystem decline led to sustained anomalous Early Triassic warmth.
Lau, Kimberly V
Springer Science and Business Media LLC
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Isson, T. T., Zhang, S., Lau, K. V., Rauzi, S., Tosca, N. J., Penman, D. E., & Planavsky, N. J. (2022). Marine siliceous ecosystem decline led to sustained anomalous Early Triassic warmth.. Nat Commun, 13 (1) https://doi.org/10.1038/s41467-022-31128-3
In the wake of rapid CO2 release tied to the emplacement of the Siberian Traps, elevated temperatures were maintained for over five million years during the end-Permian biotic crisis. This protracted recovery defies our current understanding of climate regulation via the silicate weathering feedback, and hints at a fundamentally altered carbon and silica cycle. Here, we propose that the development of widespread marine anoxia and Si-rich conditions, linked to the collapse of the biological silica factory, warming, and increased weathering, was capable of trapping Earth's system within a hyperthermal by enhancing ocean-atmosphere CO2 recycling via authigenic clay formation. While solid-Earth degassing may have acted as a trigger, subsequent biotic feedbacks likely exacerbated and prolonged the environmental crisis. This refined view of the carbon-silica cycle highlights that the ecological success of siliceous organisms exerts a potentially significant influence on Earth's climate regime.
Article, /704/106/413, /704/47/4113, /119/118, /145, article
Royal Marsden NHS Foundation Trust (Royal Marsden) (MFP-UOW2010)
External DOI: https://doi.org/10.1038/s41467-022-31128-3
This record's URL: https://www.repository.cam.ac.uk/handle/1810/338226