Synthesizing lessons from European adaptation pathways projects for climate resilience

Climate adaptation planning faces challenges due to deep uncertainty and complex socio-ecological systems, often resulting in fragmented and incremental responses. This study synthesizes experiences from 21 cities and regions across eight European Union-funded projects, employing diverse methodologies to develop adaptation pathways that sequence climate adaptation measures over time. Through a systematic approach answering research questions across 8 themes to reveal lessons learned, we find varied stakeholder engagement approaches, data limitations influencing pathway quantification, inconsistent use of adaptation tipping points, and challenges integrating pathways with spatial and urban planning frameworks. While adaptation pathways enhance long-term strategic thinking and stakeholder collaboration, their institutional embedding and operationalization remain challenging within projects. Two main directions for future pathways research and practice are derived: (1) Embedding adaptation-pathway thinking into governance and planning; and (2) Addressing data needs, robust monitoring and multidimensional uncertainties. The study underscores the importance of flexible, inclusive, and data-informed approaches to support dynamic adaptation under uncertainty. These insights inform future efforts to mainstream adaptation pathways into policy and practice, contributing to climate-resilient development in Europe and potentially other regions with similar governance and vulnerability contexts.