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Meta-study of carbonate sediment delivery rates to Indo-Pacific coral reef islands
  • Baptiste Victor Ainési,
  • Gerhard Masselink,
  • Paul Kench
Baptiste Victor Ainési
Ecole Normale Supérieure - PSL University

Corresponding Author:[email protected]

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Gerhard Masselink
Plymouth University
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Paul Kench
University of Auckland
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Coral reef islands are amongst the most vulnerable environments to sea-level rise (SLR). Recent physical and numerical modelling studies have demonstrated that overwash processes may enable reef islands to keep up with SLR through island accretion. Sediment supply to these islands from the surrounding reef system is critical in understanding their morphodynamic adjustments, but is poorly constrained due to insufficient knowledge about sediment delivery rates. This paper provides the first estimation of sediment delivery rates to coral reef islands. Analysis of topographic and geochronological data from 28 coral reef islands indicates an average rate of sediment delivery of c. 0.1m3.m-1.yr-1, but with substantial inter-island variability. Comparison with carbonate sediment production rates from census-based studies suggests that this represents c. 26% of the amount of sediment produced on the reef platform. Results of this study are useful in future modelling studies for predicting morphodynamic adjustments of coral reef islands to SLR
28 Jul 2023Submitted to ESS Open Archive
31 Jul 2023Published in ESS Open Archive