Orbital pacing and secular evolution of the Early Jurassic carbon cycle

Storm, Marisa S.; Hesselbo, Stephen P.; Jenkyns, Hugh C.; Ruhl, Micha; Ullmann, Clemens V.; Xu, Weimu; Leng, Melanie J. ORCID: https://orcid.org/0000-0003-1115-5166; Riding, James B. ORCID: https://orcid.org/0000-0002-5529-8989; Gorbanenko, Olga. 2020 Orbital pacing and secular evolution of the Early Jurassic carbon cycle. Proceedings of the National Academy of Sciences, 117 (8). 3974-3982. https://doi.org/10.1073/pnas.1912094117

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Official URL: http://dx.doi.org/10.1073/pnas.1912094117

Abstract/Summary

Cyclic variations in Earth’s orbit drive periodic changes in the ocean–atmosphere system at a time scale of tens to hundreds of thousands of years. The Mochras δ13CTOC record illustrates the continued impact of long-eccentricity (405-ky) orbital forcing on the carbon cycle over at least ∼18 My of Early Jurassic time and emphasizes orbital forcing as a driving mechanism behind medium-amplitude δ13C fluctuations superimposed on larger-scale trends that are driven by other variables such as tectonically determined paleogeography and eruption of large igneous provinces. The dataset provides a framework for distinguishing between internal Earth processes and solar-system dynamics as the driving mechanism for Early Jurassic δ13C fluctuations and provides an astronomical time scale for the Sinemurian Stage.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1073/pnas.1912094117
ISSN:	0027-8424
Date made live:	27 Feb 2020 16:40 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/527059

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1073/pnas.1912094117

ISSN:

0027-8424

Date made live:

27 Feb 2020 16:40 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/527059