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A global classification of coastal flood hazard climates associated with large-scale oceanographic forcing

A. Rueda,S. Vitousek,P. Camus,A. Tomás,A. Espejo,I. Losada,P. Barnard,L. Erikson,P. Ruggiero,B. Reguero,F. Méndez

Published 2017 in Scientific Reports

ABSTRACT

Coastal communities throughout the world are exposed to numerous and increasing threats, such as coastal flooding and erosion, saltwater intrusion and wetland degradation. Here, we present the first global-scale analysis of the main drivers of coastal flooding due to large-scale oceanographic factors. Given the large dimensionality of the problem (e.g. spatiotemporal variability in flood magnitude and the relative influence of waves, tides and surge levels), we have performed a computer-based classification to identify geographical areas with homogeneous climates. Results show that 75% of coastal regions around the globe have the potential for very large flooding events with low probabilities (unbounded tails), 82% are tide-dominated, and almost 49% are highly susceptible to increases in flooding frequency due to sea-level rise.

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