Was climatic cooling during the earliest Carboniferous driven by expansion of seed plants?
| Autor: | Thomas J. Algeo, Wenkun Qie, Xiangdong Wang, Bo Chen, Marcel Regelous, Michael M. Joachimski, Pu Huang, Tianchen He, Jitao Chen, Philip A.E. Pogge von Strandmann, Isabel P. Montañez, Jiangsi Liu |
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| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
biology Paleozoic Earth science Climate change Weathering 15. Life on land 010502 geochemistry & geophysics biology.organism_classification 01 natural sciences Carbon cycle Geophysics 13. Climate action Space and Planetary Science Geochemistry and Petrology Carboniferous Earth and Planetary Sciences (miscellaneous) Ice age Conodont Global cooling Geology 0105 earth and related environmental sciences |
| Zdroj: | Earth and Planetary Science Letters |
| ISSN: | 0012-821X |
| DOI: | 10.1016/j.epsl.2021.116953 |
| Popis: | The expansion of land plants is considered to have played a key role in triggering the Late Paleozoic Ice Age (LPIA), but evidence linking climatic events to terrestrial floral changes is limited. Here, we generated bulk carbonate δ13C, conodont δ18O and 87Sr/86Sr profiles from the lowermost Carboniferous of South China and Vietnam in order to investigate their relationship to contemporaneous land plant evolution. Climatic cooling in the mid-Tournaisian coincided with large perturbations to the global carbon cycle and continental weathering regimes as well as with a major diversification episode among seed plants. These relationships are consistent with terrestrial floral changes triggering intensified weathering of basalts (i.e., lower 87Sr/86Sr), enhanced marine productivity (i.e., higher δ13Ccarb), and reduced atmospheric pCO2 and attendant global cooling (i.e., higher conodont δ18O). The results of our study suggest that expansion of terrestrial floras was a key driver of Early Carboniferous climate change. |
| Databáze: | OpenAIRE |
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