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Carnegie Climate Governance Initiative
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Policy Brief: Governing Marine Solar Radiation Management
Current commitments made under the 2015 Paris Agreement on climate change
are insufficient to keep global warming to ‘well below’ 2°C, and according
to the Intergovernmental Panel on Climate Change (IPCC), much greater
ambition is necessary.

In response to the risks posed by climate change, some are considering the
viability of Solar Radiation Modification (SRM) techniques, which aim to
reflect solar radiation back into space or allow more heat to escape
Earth’s atmosphere. With more than two thirds of Earth covered by water,
numerous potential SRM techniques might be considered for deployment in the
marine environment in the future.

Marine SRM techniques are for the most part theoretical, but if ever
deployed, some could create large and potentially long-term risks and
governance challenges. We do not yet know enough about the risks, costs and
potential benefits, or governance requirements, to understand if marine SRM
techniques could be viable, or – if so – whether, when or how to deploy
them.


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