SRM on the table: the role of geoengineering for the stability and effectiveness of climate coalitions

Piergiuseppe Pezzoli (), Johannes Emmerling () and Massimo Tavoni ()
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Piergiuseppe Pezzoli: Centro Euro-Mediterraneo sui Cambiamenti Climatici
Johannes Emmerling: Centro Euro-Mediterraneo sui Cambiamenti Climatici
Massimo Tavoni: Centro Euro-Mediterraneo sui Cambiamenti Climatici

Climatic Change, 2023, vol. 176, issue 10, No 11, 21 pages

Abstract: Abstract Geoengineering, including solar radiation management (SRM), has received increasing scrutiny due to the rise of climate extremes and slow progress in mitigating global carbon emissions. This climate policy option, even as a possibility, can have consequential implications for international climate governance. Here, we study how solar engineering affects the effectiveness and stability of a large set of regional coalitions through numerical simulations. We posit a requirement in terms of global political or economic power and analyze the exclusive membership coalition formation process when coalitions jointly decide on geoengineering and mitigation. We show that geoengineering can provide incentives for cooperation and partially solve the typical trade-off between stability and effectiveness of climate coalitions. However, temperature reduction mostly comes from deploying SRM within the coalition rather than from further emission reductions, thus exposing the world to relatively large-scale deployment of SRM with as of today uncertain potential side effects and risks.

Keywords: Geoengineering; Mitigation; Coalitions; Stability (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1007/s10584-023-03604-2

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