Solar radiation modification (SRM): intractable governance and uncertain science : discussion paper

In: Climate change 2024, 18

In: Research Project of the Federal Foreign Office

Abstract

This discussion paper provides an examination of proposed solar radiation modification (SRM) technologies and their multifaceted implications, based on insights gained from two expert workshops convened by the German Environment Agency and the Copernicus Institute of Sustainable Development, blended with an overview of the academic literature as well as personal assessments and opinions from the authors. SRM encompasses diverse methods proposed to moderate the effects of climate change by reducing solar insolation into the earth climate system, with prominent options including stratospheric aerosol injection (SAI) and marine cloud brightening (MCB). While some advocate for SRM research as imperative given the urgency of the climate crisis, others emphasize the need for caution due to potential technological, ecological, and geopolitical of SRM. The governance of SRM research poses significant challenges, with disagreements often rooted in divergent worldviews and values. We underscore the importance of nuanced approaches, advocating for a multilateral moratorium on the use of SRM while also supporting a stringent framework regulating research activities. Our analysis highlights the necessity of an informed and inclusive dialogue on SRM governance, balancing scientific inquiry with ethical and societal considerations.