Note: Funding Information: We thank Ricardo Briganti, Juan Jose Munoz-Perez, João Canning-Clode and Ivica Vilibic for editing papers involving editors of this Research Topic. We thank the WRCP Grand Challenge on Regional Sea level and Coastal Impacts, Clivar and BRGM for organizing the workshop and US-Clivar, UNESCO/IOC for sponsorship. Funding Information: GC, RN, RW were supported by PROTECT. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 869304, PROTECT contribution number 37.