![]() ![]() Storm M.S., Hesselbo S.P., Jenkyns H.C., Ruhl R., Ullmann C.V., Xu W., Leng M., Riding R.B., Gorbanenko O. ( 2020): On the Onset of Central Atlantic Magmatic Province (CAMP) Volcanism, Environmental and Carbon-Cycle Change at the Triassic–Jurassic Transition (Neuquén Basin, Argentina). Ruhl M., Hesselbo S.P., Al-Suwaidi A., Jenkyns H.C., Damborenea S.E., Manceñido M., Storm M.S., Mather T., Riccardi A. C. ( 2022): New age constraints on the Lower Jurassic Pliensbachian–Toarcian Boundary at Chacay Melehue (Neuquén Basin, Argentina). (Georessources Management), RWTH Aachen, GermanyĪl-Suwaidi, A.H., Ruhl, M., Jenkyns, H.C., Damborenea, S. This project is aiming to reconstruct atmospheric CO 2 throughout Early Jurassic key intervals, such as the Sinemurian-Pliensbachain boundray, in order to contextualize climatic events and distinguish between and the causal mechanisms driving climatic shifts such as changing Carbon dioxide concentrations vs paleogeographic and oceanographic chages. ![]() Geochemical records suggest changes in the global carbon cycle, frequent development of organic matter preservation intervals, climatic hot and cold snaps and oceanographic changes - however, there is no hollistic understanding of the secular evolution of the Early Jurassic paleoenvironment and climate following the ETE and leading up to the T-OAE. While these event intervals are well studied, information on the time interval bracketed by these events, comprising some 18 Ma years, is comparatively scarse. The Early Jurassic (~201 - 174 Ma) was marked by major paleoenvironmental and climatic events, namely the end-Triassic mass extinction (ETE) and the Toarcian oceanic anoxic event (T-OAE). It therefore has the potential to generate long-term and high resolution pCO 2 reconstructions based on a single proxy preserved in the Mesozoic record - a vast advantage above e.g., species- specific biomarkers (e.g. Phytane is one of the most abundantly available phytoplanktonic biomarkers and spatially and temporally ubiquitous. Quantifying pCO 2 in the geological record can offer context for evaluating the direction and magnitude of climate change, and aid in a better understanding of evironmental responses and feedback mechanisms associated with increasing greenhouse gas release.Ī recently developed method utilizes the isotopic composition of phytane as a pCO 2 proxy. Quantifying pCO 2 in the geological past as a key to the Early Jurassic paleoenvironment and climateĬarbon dioxide concentrations in the atmosphere ( pCO 2) play a key role in the Earth’s climate dynamics. ![]()
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