Publication details.


Author(s):M. Marcos, J. Rohmer, M. Vousdoukas, L. Mentaschi, G. Le Cozannet, A. Amores
Title:Increased Extreme Coastal Water Levels Due to the Combined Action of Storm Surges and Wind Waves
JCR Impact Factor:4.497
Issue No.:8
Abstract:©2019. American Geophysical Union. All Rights Reserved.The dependence between extreme storm surges and wind waves is assessed statistically along the global coasts using the outputs of two numerical models consistently forced with the same atmospheric fields. We show that 55% of the world coastlines face compound storm surge wave extremes. Hence, for a given level of probability, neglecting these dependencies leads to underestimating extreme coastal water levels. Dependencies are dominant in midlatitudes and are likely underestimated in the tropics due to limited representation of tropical cyclones. Furthermore, we show that in half of the areas with dependence, the estimated probability of occurrence of coastal extreme water levels increases significantly when it is accounted for. Translated in terms of return periods, this means that along 30% of global coastlines, extreme water levels expected at most once in a century without considering dependence between storm surges and waves become a 1 in 50-year event.

Related staff

  • Marta Marcos Moreno
  • Ángel Miguel Amores Maimó
  • Related departments

  • Oceanography and Global Change
  • Related research groups

  • Marine Technologies, Operational and Coastal Oceanography