Special issues PALeo constraints on SEA level rise (PALSEA): ice-sheet and sea-level responses to past climate warming 12491 Holocene sea-level history of the northern coast of South China Sea 12492 Glacial isostatic adjustment along the Pacific coast of central North America 12490 Placing the Common Era in a Holocene context: millennial to centennial patterns and trends in the hydroclimate of North America over the past 2000 years 12457 Technical note: Open-paleo-data implementation pilot – the PAGES 2k special issue 12448