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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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https://doi.org/10.5194/gmd-2020-233
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-2020-233
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: model description paper 10 Aug 2020

Submitted as: model description paper | 10 Aug 2020

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This preprint is currently under review for the journal GMD.

Inclusion of a suite of weathering tracers in the cGENIE Earth System Model – muffin release v.0.9.10

Markus Adloff1, Andy Ridgwell1,2, Fanny M. Monteiro1, Ian J. Parkinson3, Alexander Dickson4, Philip A. E. Pogge von Strandmann5, Matthew S. Fantle6, and Sarah E. Greene7 Markus Adloff et al.
  • 1BRIDGE (Bristol Research Initiative for the Dynamic Global Environment), School of Geographical Sciences, University of Bristol, Bristol, UK
  • 2Department of Earth Sciences, University of California Riverside, Riverside, California, USA
  • 3School of Earth Sciences, University of Bristol, Bristol, UK
  • 4Department of Earth Sciences, Royal Holloway University of London, London, UK
  • 5London Geochemistry and Isotope Centre (LOGIC), Institute of Earth and Planetary Sciences, University College London and Birkbeck, University of London, London, UK
  • 6Department of Geosciences, Penn State University, Pennsylvania, USA
  • 7School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, UK

Abstract. The metals strontium (Sr), lithium (Li), osmium (Os) and calcium (Ca) and their isotopes are important tracers in the study of changes in weathering rates and volcanism, two main processes which shape the long-term cycling of carbon and other biogeochemically important elements at the Earth's surface. Traditionally, isotopic shifts of these four elements in the geologic record are interpreted with isotope-mixing, tracer-specific box models because of their long residence times in the ocean. However, these models often lack mechanistic links between the cycling of the four metals and other geochemically relevant elements, particularly carbon. Here we develop and evaluate the implementation of Sr, Li, Os and Ca isotopes into the Earth system model cGENIE. The model has the potential to study these metal systems at equilibrium and under perturbations alongside other biogeochemical cycles. We provide examples of how to apply this new model to investigate Sr, Li, Os and Ca isotope dynamics and responses to environmental change.

Markus Adloff et al.

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Model code and software

cgenie.muffin v.0.9.10 Andy Ridgwell, Chris Reinhard, Sebastiaan van de Velde, Markus Adloff, Jamie Wilson, Fanny Monteiro, Dominik Hülse, and Pam Vervoort https://doi.org/10.5281/zenodo.3620846

Markus Adloff et al.

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Latest update: 28 Sep 2020
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Short summary
We present the first representation of the trace metals Sr, Os, Li and Ca in a 3D Earth system model (cGENIE). The simulation of marine metal sources (weathering, hydrothermal input) and sinks (deposition) reproduces the observed concentrations and isotopic homogeneity of these metals in the modern ocean. With these new tracers, cGENIE can be used to test hypotheses linking these metal cycles and the cycling of other elements like O and C, and simulate their dynamic response to external forcing.
We present the first representation of the trace metals Sr, Os, Li and Ca in a 3D Earth system...
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