Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
doi:10.5194/nhess-2016-361
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
12 Dec 2016
Review status
A revision of this discussion paper is under review for the journal Natural Hazards and Earth System Sciences (NHESS).
Changes in beach shoreline due to sea level rise and waves under climate change scenarios: application to the Balearic Islands (Western Mediterranean)
Alejandra R. Enríquez1, Marta Marcos1, Amaya Álvarez-Ellacuría2, Alejandro Orfila1, and Damià Gomis1 1IMEDEA (Universitat de les Illes Balears – CSIC), Esporles, Spain
2SOCIB, Balearic Islands Coastal Observing and Forecasting System, Spain
Abstract. In this work we assess the impacts in reshaping coastlines as a result of sea level rise and changes in wave climate. The methodology proposed combines the SWAN and SWASH wave models to resolve the wave processes from deep waters up to the swash zone in two micro-tidal sandy beaches in Mallorca Island, Western Mediterranean. In a first step, the modelling approach is validated with observations from wave gauges and from the shoreline inferred from video monitoring stations, showing a good agreement between them. Afterwards, the modelling setup is applied to the 21st century sea level and wave projections under two different climate scenarios, RCP45 and RCP85. Sea level projections were retrieved from state of the art regional estimates, while wave projections were obtained from regional climate models. Changes in the coastline are explored under mean and extreme wave conditions. Our results indicate that the studied beaches would suffer a coastal retreat between 7 and up to 50 m, equivalent to half of the present-day aerial beach surface, under the climate scenarios considered.

Citation: Enríquez, A. R., Marcos, M., Álvarez-Ellacuría, A., Orfila, A., and Gomis, D.: Changes in beach shoreline due to sea level rise and waves under climate change scenarios: application to the Balearic Islands (Western Mediterranean), Nat. Hazards Earth Syst. Sci. Discuss., doi:10.5194/nhess-2016-361, in review, 2016.
Alejandra R. Enríquez et al.
Alejandra R. Enríquez et al.
Alejandra R. Enríquez et al.

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Short summary
In this work we assess the impacts in reshaping coastlines as a result of sea level rise and changes in wave climate. The methodology proposed combines two wave models to resolve the wave processes in two micro-tidal sandy beaches in Mallorca Island, Western Mediterranean. The modelling approach is validated with observations. Our results indicate that the studied beaches would suffer a coastal retreat between 7 and up to 50 m, equivalent to half of the present-day aerial beach surface.
In this work we assess the impacts in reshaping coastlines as a result of sea level rise and...
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