‘Opening up’ geoengineering appraisal: Multi-Criteria Mapping of options for tackling climate change

New IAGP research article published with Global Environmental Change: ‘Opening up’ geoengineering appraisal: Multi-Criteria Mapping of options for tackling climate change. In response to the ‘closing down’ identified in the first systematic review of climate geoengineering appraisals, geoengineering appraisal is 'opened up' here for the first time to a diversity of framings, knowledges and pathways using a Multi-Criteria Mapping methodology. Carbon and solar geoengineering proposals are appraised alongside a range of other options for responding to climate change with a select but diverse group of experts and stakeholders. A radically different view has emerged, with geoengineering proposals performing more poorly than their mitigation counterparts. In particular, where stratospheric aerosol injection has previously outperformed other geoengineering options, when assessed against a broader diversity of criteria (spanning all the identified criteria groups) and other options for responding to climate change it performs relatively poorly. The article concludes with several key recommendations are made for future policy and research.