A global analysis of extreme coastal water levels with implications for potential coastal overtopping - Archive ouverte HAL Access content directly
Journal Articles Nature Communications Year : 2021

A global analysis of extreme coastal water levels with implications for potential coastal overtopping

(1) , (1) , , , (1) , , (1) , , , , , (1)
1

Abstract

Abstract Climate change and anthropogenic pressures are widely expected to exacerbate coastal hazards such as episodic coastal flooding. This study presents global-scale potential coastal overtopping estimates, which account for not only the effects of sea level rise and storm surge, but also for wave runup at exposed open coasts. Here we find that the globally aggregated annual overtopping hours have increased by almost 50% over the last two decades. A first-pass future assessment indicates that globally aggregated annual overtopping hours will accelerate faster than the global mean sea-level rise itself, with a clearly discernible increase occurring around mid-century regardless of climate scenario. Under RCP 8.5, the globally aggregated annual overtopping hours by the end of the 21 st -century is projected to be up to 50 times larger compared to present-day. As sea level continues to rise, more regions around the world are projected to become exposed to coastal overtopping.
Fichier principal
Vignette du fichier
s41467-021-24008-9.pdf (3.01 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

insu-03340636 , version 1 (10-09-2021)

Licence

Attribution - CC BY 4.0

Identifiers

Cite

Luis Pedro Almeida, Rafael Almar, Roshanka Ranasinghe, Erwin W J Bergsma, Harold Diaz, et al.. A global analysis of extreme coastal water levels with implications for potential coastal overtopping. Nature Communications, 2021, 12 (1), ⟨10.1038/s41467-021-24008-9⟩. ⟨insu-03340636⟩
49 View
17 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More