This study investigates the vulnerability of the US Atlantic coast to sea-level rise, focusing on the impact of land subsidence. Using satellite data (2007-2020), the researchers created a high-resolution map of subsidence rates. They found that subsidence exceeding 3 mm per year affects most coastal areas, particularly coastal marshes. The study highlights that previous assessments underestimated marsh vulnerability by not fully accounting for subsidence, estimating that 58-100% of coastal marshes are losing elevation relative to sea level.

Leonard O. Ohenhen, Manoochehr Shirzaei, Chandrakanta Ojha, Matthew L. Kirwan