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I/Ca in epifaunal benthic foraminifera: A semi-quantitative proxy for bottom water oxygen in a multi-proxy compilation for glacial ocean deoxygenation

https://doi.org/10.1016/j.epsl.2019.116055

Lu, Wanyi; Rickaby, Rosalind E.M.; Hoogakker, Babette A.A.; Rathburn, Anthony E.; Burkett, Ashley M.; Dickson, Alexander J.; Martínez-Méndez, Gema; Hillenbrand, Claus-Dieter; Zhou, Xiaoli; Thomas, Ellen; et al (March 2020, Earth and Planetary Science Letters)

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Intensified Ocean Deoxygenation During the end Devonian Mass Extinction

https://doi.org/10.1029/2019GC008614

Liu, Jiangsi; Luo, Genming; Lu, Zunli; Lu, Wanyi; Qie, Wenkun; Zhang, Feifei; Wang, Xiangdong; Xie, Shucheng (December 2019, Geochemistry, Geophysics, Geosystems)
Paleo-redox context of the Mid-Devonian Appalachian Basin and its relevance to biocrises

https://doi.org/10.1016/j.gca.2019.12.019

He, Ruliang; Lu, Wanyi; Junium, Christopher K.; Ver Straeten, Charles A.; Lu, Zunli (December 2019, Geochimica et Cosmochimica Acta)

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Refining the planktic foraminiferal I/Ca proxy: Results from the Southeast Atlantic Ocean

https://doi.org/10.1016/j.gca.2019.10.025

Lu, Wanyi; Dickson, Alexander J.; Thomas, Ellen; Rickaby, Rosalind E.M.; Chapman, Piers; Lu, Zunli (October 2019, Geochimica et Cosmochimica Acta)

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Late inception of a resiliently oxygenated upper ocean

https://doi.org/10.1126/science.aar5372

Lu, Wanyi; Ridgwell, Andy; Thomas, Ellen; Hardisty, Dalton S.; Luo, Genming; Algeo, Thomas J.; Saltzman, Matthew R.; Gill, Benjamin C.; Shen, Yanan; Ling, Hong-Fei; et al (May 2018, Science)

Rising oceanic and atmospheric oxygen levels through time have been crucial to enhanced habitability of surface Earth environments. Few redox proxies can track secular variations in dissolved oxygen concentrations ([O2]) around threshold levels for metazoan survival in the upper ocean. We present an extensive compilation of iodine to calcium ratios (I/Ca) in marine carbonates. Our record supports a major rise in atmospheric pO2 at ~400 million years ago (Ma), and reveals a step-change in the oxygenation of the upper ocean to relatively sustainable near-modern conditions at ~200 Ma. An Earth system model demonstrates that a shift in organic matter remineralization to greater depths, which may have been due to increasing size and biomineralization of eukaryotic plankton, likely drove the I/Ca signals at ~200 Ma
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