Liu, Z, Ji, X, Luo, W et al. (2 more authors) (2023) Deciphering the Palaeocene-Eocene thermal maximum by Granger causality test. Geosystems and Geoenvironment, 2 (1). 100125. ISSN 2772-8838
Abstract
The Palaeocene-Eocene thermal maximum is a global warming period (∼56 Ma), which is marked by a sharp negative carbon isotope excursion (CIE) that caused by the injection of massive isotopically-light carbon into the ocean-atmosphere. It is generally considered that the carbon injection caused global warming. However, several studies have suggested that warming and environmental perturbations precede the onset of the CIE. Here we present Granger test to investigate the detailed mechanisms of this event. We show a shift from climate-warming driving carbon-emission scenario to a scheme in which carbon-injection causing global-warming during the CIE. The initial carbon emission might be from methane hydrates dissociation and/or permafrost thawing, possibly linked with astronomical paced warming. This change of causal direction may result from the warming feedback of the emitted carbon and additional carbon from other sources, such as volcanism, bolide impact, oxidation of marine organic matter, and wildfires burning peatlands.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Author(s). Published by Elsevier Ltd on behalf of Ocean University of China. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
Keywords: | Climate warming; Carbon emission; Gas hydrate; Oxygen isotope |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Business (Leeds) > Work and Employment Relation Division (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 20 Sep 2022 13:49 |
Last Modified: | 01 Feb 2023 01:58 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.geogeo.2022.100125 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:190976 |