Sea-level rise from land subsidence in major coastal cities

Coastal land can be lost at rapid rates due to relative sea-level rise (RSLR) resulting from local subsidence. However, the comparative severity of subsidence is unknown high spatial variabilities and difficulties reconciling observations across localities. Here we provide self-consistent, resolution (RLLS) velocities derived Interferometric Synthetic Aperture Radar for 48 largest coastal cities, which represent 20% global urban population. We show that cities experiencing fastest RLLS are concentrated in Asia. also more variable (−16.2 1.1 mm per year) than Intergovernmental Panel on Climate Change estimations vertical motion (−5.2 4.9 year). With our standardized method, identification vulnerabilities comparisons RSLR effects accounting now possible worldwide. These will better inform sustainable planning future adaptation strategies cities. face a compound threat subsidence; however, spatially difficult quantify. Remote interferometric radar allow high-resolution major