Longman, J, Mills, BJW orcid.org/0000-0002-9141-0931, Donnadieu, Y et al. (1 more author) (2022) Assessing Volcanic Controls on Miocene Climate Change. Geophysical Research Letters, 49 (2). e2021GL096519. ISSN 0094-8276
Abstract
The Miocene period saw substantially warmer Earth surface temperatures than today, particularly during a period of global warming called the Mid Miocene Climatic Optimum (MMCO; ∼17–15 Ma). However, the long-term drivers of Miocene climate remain poorly understood. By using a new continuous climate-biogeochemical model (SCION), we can investigate the interaction between volcanism, climate and biogeochemical cycles through the Miocene. We identify high tectonic CO2 degassing rates and further emissions associated with the emplacement of the Columbia River Basalt Group as the primary driver of the background warmth and the MMCO respectively. We also find that enhanced weathering of the basaltic terrane and input of explosive volcanic ash to the oceans are not sufficient to drive the immediate cooling following the MMCO and suggest that another mechanism, perhaps the change in ocean chemistry due to massive evaporite deposition, was responsible.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2022. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | Mid Miocene Climatic Optimum; biogeochemical modeling; SCION; volcanism; tectonic forcing; weathering feedbacks |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Earth Surface Science Institute (ESSI) (Leeds) |
Funding Information: | Funder Grant number NERC (Natural Environment Research Council) NE/S009663/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 27 Jan 2022 13:20 |
Last Modified: | 27 Jan 2022 13:20 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1029/2021GL096519 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:182901 |