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Hidden vulnerability of US Atlantic coast to sea-level rise due to vertical land motion

Earth Sciences

Hidden vulnerability of US Atlantic coast to sea-level rise due to vertical land motion

L. O. Ohenhen, M. Shirzaei, et al.

This groundbreaking study by Leonard O. Ohenhen, Manoochehr Shirzaei, Chandrakanta Ojha, and Matthew L. Kirwan reveals alarming findings about the vulnerability of the US Atlantic coast to sea-level rise. By thoroughly analyzing satellite data, the researchers uncover that significant subsidence rates are putting coastal marshes at risk, with many losing elevation faster than anticipated. Discover how this work reshapes our understanding of marsh vulnerability!

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Playback language: English
Abstract
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.
Publisher
Nature Communications
Published On
Apr 11, 2023
Authors
Leonard O. Ohenhen, Manoochehr Shirzaei, Chandrakanta Ojha, Matthew L. Kirwan
Tags
sea-level rise
land subsidence
coastal vulnerability
satellite data
coastal marshes
elevation loss
US Atlantic coast

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