Articles | Volume 11, issue 3
https://doi.org/10.5194/esurf-11-529-2023
https://doi.org/10.5194/esurf-11-529-2023
Research article
 | 
27 Jun 2023
Research article |  | 27 Jun 2023

Initial shape reconstruction of a volcanic island as a tool for quantifying long-term coastal erosion: the case of Corvo Island (Azores)

Rémi Bossis, Vincent Regard, and Sébastien Carretier

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Short summary
This study presents a method to calculate the volume of rock eroded by the sea on volcanic islands, by reconstructing their pre-erosion shape and size. The method has been applied on Corvo Island (Azores). We show that before the island was eroded, it was roughly 8 km wide and 1 km high. The island has lost more than 6 km3 of rock and 80 % of its surface. We also show that the erosion of sea cliffs is mainly due to the moderate and most frequent waves.