Next generation scenarios for informing climate and sustainability transitions

Actions should improve Integrated Assessment Models (IAMs) or propose alternative approaches to address key challenges and gaps in current climate scenario frameworks.

They should extend the scope of scenarios beyond the 21st century, enlarge the future possibility space with more diverse narratives and drivers (e.g. post-growth), more explicit consideration of equity, justice, geopolitics and attention to inclusivity.

Area A: Integration of climate impacts and adaptation dimension - Develop approaches to better integrate physical climate impacts, adaptation, its costs and limits into mitigation pathways. This includes exploring how climate impacts including extremes and biophysical feedbacks affect mitigation strategies, testing the resilience of low-emission pathways to climate impacts, and how adaptation interacts with mitigation.

Area B: Improved scenario frameworks - Update baseline scenarios and expand scenario narratives to better address multi-scale, cross-sectoral issues and the needs of downstream assessments. Scenarios should capture a wider range of plausible futures to reflect changing socio-economic and environmental conditions (including a broader range of economic growth assumptions), technological advancements, evolving policy landscape and disruptive events. This includes extension of Shared Socioeconomic Pathways (SSP) and Representative Concentration Pathways (RCP) scenario framework, or development of alternatives, to enhance regional and local applicability, to support adaptation pathway development, and to improve relevance beyond the climate research community - notably for biodiversity and SDGs.

Area C: Improved policy representation - Enhance the granularity and diversity of policy (both mitigation and adaptation) representation in scenarios with more focus on implementation aspects to bridge the gap between modelled pathways and real-world action. Address social, geopolitical, economic and technological factors, considering interactions between industrial, trade, climate and other environmental policies (e.g. air pollution). Examine implications for competitiveness, employment, investment flows, energy security, supply chain resilience, technological innovation, international spillovers, as well as well-being. Investigate implementation and impact of recent commitments and initiatives (e.g. fossil fuel phase-out, Global Methane Pledge) and the impact of rising geopolitical tensions on their implementation, and mitigation action overall.

Actions should promote transdisciplinary collaboration and co-design with stakeholders to integrate diverse perspectives and needs.

They should develop and test new approaches, including communication, to improve uptake of results by various audiences.

The topic therefore requires inclusion of relevant SSH expertise, to produce meaningful and significant effects to enhance the societal impact of related research activities.

All projects funded from this topic are strongly encouraged to collaborate and envisage clustering activities together and with other relevant projects in and outside of Horizon Europe.

They should contribute to the organisation of the European Climate and Energy Modelling Platform conferences to foster dialogue between scientists, policymakers and other stakeholders.

They should also support inclusive and transparent model intercomparison exercises, aligning with the efforts of the European Climate and Energy Modelling Forum.

International cooperation is generally encouraged and specifically required with low, and lower/upper-middle-income countries – particularly major GHG emitters such as China (contributing to the EU-China Climate Change and Biodiversity (CCB) flagship initiative), India, Brazil and Indonesia.

It should ensure diverse, globally representative scenario space and, where appropriate, foster capacity development.