Mapping the accumulated carbon storage of global coastal wetlands from 2000 to 2020 at a 1km resolution

Coastal wetlands are among the most productive ecosystems globally and play a crucial role in carbon sequestration. However, their carbon sequestration capacity has increasingly been affected by climate change and anthropogenic activities in recent decades. Revealing spatiotemporal changes in coastal wetland carbon sequestration capacity over extended time periods is crucial for understanding the long-term carbon dynamics. Our research constructed a global spatial dataset of accumulated carbon stocks in coastal wetlands at 1 km resolution for the period 2000–2020, capturing spatiotemporal variations in carbon stocks at both global and regional scales and identifying regional patterns of accumulated carbon stock losses. Our findings provide a solid basis for pinpointing vulnerable areas in need of restoration efforts and for supporting sustainable management of coastal wetland ecosystems.