Rock coast erosion: An overlooked source of sediments to the ocean. Europe as an example

Abstract

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Rock coast erosion: an overlooked source of sedimentsto the ocean. Europe as an example

How volcanic stratigraphy constrains headscarp collapse scenarios: the Samperre cliff case study (Martinique island, Lesser Antilles)

“…It is twice as much as the estimation of 0.1 × 10 6 m 3 yr −1 of Clouard et al (2013). If we assume a density of 3000 kg m 3 , we get a flux between 0.3 and 0.6 Mt yr −1 : it represents between 0.2 % and 0.5 % of the sediment flux from cliff retreat in Europe (over a distance of 127 000 km; see Regard et al, 2022).…”

How 3d volcanic stratigraphy constrains headscarp collapse scenarios: the Samperre Cliff case study (Martinique Island, Lesser Antilles)

“…It is twice as much as the estimation 0.1 × 10 6 m 3 yr −1 of Clouard et al (2013). If we assume a density of 3000 kg m 3 , we get a flux between 0.3 and 0.6 Mt yr −1 : it represents between 0.2% and 0.5% of the sediment flux from cliff retreat in Europe (over a distance of 127,000 km, see Regard et al, 2022). Of course, the Samperre cliff has been particularly active since (at least) 1950 and our results suggest it could reach an equilibrium state in the coming decades.…”

A Model Integrating Satellite‐Derived Shoreline Observations for Predicting Fine‐Scale Shoreline Response to Waves and Sea‐Level Rise Across Large Coastal Regions

“…Hence, the modeling approach (and the results in Figure 12) may misrepresent the episodic nature of sediment supply in some locations. The current shoreline model could, in theory, be coupled with parameterized models of cliff erosion and/or fluvial input (e.g., Alessio & Keller, 2020; Limber et al., 2018; Regard et al., 2022) to mitigate reliance on the long‐term residual shoreline trend parameter (e.g., $${v}_{\text{lt}}$$). However, this endeavor, which has not yet been attempted in the literature, is beyond the scope of the current work and is left as future work.…”