Articles | Volume 2-oae2023
https://doi.org/10.5194/sp-2-oae2023-8-2023
https://doi.org/10.5194/sp-2-oae2023-8-2023
27 Nov 2023
 | OAE Guide 2023 | Chapter 8
 | 27 Nov 2023 | OAE Guide 2023 | Chapter 8

Natural analogs to ocean alkalinity enhancement

Adam V. Subhas, Nadine Lehmann, and Rosalind E. M. Rickaby

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Cited articles

Andersson, A. J.: A fundamental paradigm for coral reef carbonate sediment dissolution, Frontiers in Marine Science, 2, 52, https://doi.org/10.3389/fmars.2015.00052, 2015. 
Archer, D., Kheshgi, H., and Maier-Reimer, E.: Dynamics of fossil fuel CO2 neutralization by marine CaCO3, Global Biogeochem. Cy., 12, 259–276, https://doi.org/10.1029/98gb00744, 1998. 
Bach, L. T. and Boyd, P. W.: Seeking natural analogs to fast-forward the assessment of marine CO2 removal, P. Natl. Acad. Sci. USA, 118, e2106147118, https://doi.org/10.1073/pnas.2106147118, 2021. 
Bach, L. T., Gill, S. J., Rickaby, R. E. M., Gore, S., and Renforth, P.: CO2 Removal with Enhanced Weathering and Ocean Alkalinity Enhancement: Potential Risks and Co-benefits for Marine Pelagic Ecosystems, Frontiers in Climate, 1, https://doi.org/10.3389/fclim.2019.00007, 2019. 
Bacon, M. P. and Anderson, R. F.: Distribution of thorium isotopes between dissolved and particulate forms in the deep sea, J. Geophys. Res.-Oceans, 87, 2045–2056, https://doi.org/10.1029/jc087ic03p02045, 1982. 
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In addition to emissions reductions, methods of actively removing carbon dioxide from the atmosphere must be considered. One of these methods, called ocean alkalinity enhancement, is currently being studied to evaluate its effectiveness and safety. This article details best practices for the study of natural systems to support the development of ocean alkalinity enhancement as a carbon dioxide removal strategy. Relevant Earth system processes are discussed, along with methods to study them.
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