Preprints
https://doi.org/10.5194/egusphere-2022-508
https://doi.org/10.5194/egusphere-2022-508
05 Jul 2022
 | 05 Jul 2022

Impact of wave-water level non-linear interactions for the projections of mean and extreme wave conditions along the coasts of western Europe

Alisée A. Chaigneau, Stéphane Law-Chune, Angélique Melet, Aurore Voldoire, Guillaume Reffray, and Lotfi Aouf

Abstract. Wind-waves are a main driver of coastal environment changes. Wave setup and runup contribute to coastal hazards such as coastal flooding during extreme water level (EWL) events. Wave characteristics used to estimate wave setup are sensitive to changes in water depth in shallow waters. However, wind-waves models used for historical simulations and projections typically do not account for water level changes whether from tides, storm surges, or long-term sea level rise. In this study, the sensitivity of projected changes in wind-wave characteristics to the non-linear interactions between wind-waves and water level changes is investigated along the Atlantic European coastline. For this purpose, a global wave model is dynamically downscaled over the northeastern Atlantic for the 1950–2100 period and for two climate change scenarios (SSP1-2.6 and SSP5-8.5). Twin experiments are performed by accounting (or not) for hourly variations of water level from regional ocean simulations in the regional wave model. The largest impacts of wave-water level interactions are found in the Bay of Mont-Saint-Michel in France, due to a large tidal range of 10 m. At this location and during an historical extreme event, significant wave height was found to be up to 1 m higher (or +25 %) when considering water level variations, leading to an increase in wave setup by between +8.4 cm and +14.7 cm, depending on the value of the beach slope used. At the end of the 21st century under SSP5-8.5 scenario, the wave simulation including water level variations exhibits an increase in extreme significant wave heights and wave setup values by up to +20 % and +10 % respectively. These results are found for many coastal points of the large continental shelf where shallow-water dynamics prevail, and especially so in macro-tidal areas.

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Journal article(s) based on this preprint

20 Jul 2023
Impact of sea level changes on future wave conditions along the coasts of western Europe
Alisée A. Chaigneau, Stéphane Law-Chune, Angélique Melet, Aurore Voldoire, Guillaume Reffray, and Lotfi Aouf
Ocean Sci., 19, 1123–1143, https://doi.org/10.5194/os-19-1123-2023,https://doi.org/10.5194/os-19-1123-2023, 2023
Short summary
Alisée A. Chaigneau, Stéphane Law-Chune, Angélique Melet, Aurore Voldoire, Guillaume Reffray, and Lotfi Aouf

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-508', Anonymous Referee #1, 07 Sep 2022
    • AC1: 'Reply on RC1', Alisée Chaigneau, 20 Dec 2022
  • RC2: 'Comment on egusphere-2022-508', Anonymous Referee #2, 30 Sep 2022
    • AC2: 'Reply on RC2', Alisée Chaigneau, 20 Dec 2022

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-508', Anonymous Referee #1, 07 Sep 2022
    • AC1: 'Reply on RC1', Alisée Chaigneau, 20 Dec 2022
  • RC2: 'Comment on egusphere-2022-508', Anonymous Referee #2, 30 Sep 2022
    • AC2: 'Reply on RC2', Alisée Chaigneau, 20 Dec 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Alisée Chaigneau on behalf of the Authors (20 Dec 2022)  Author's response   Author's tracked changes   Manuscript 
ED: Reconsider after major revisions (04 Jan 2023) by Joanne Williams
AR by Alisée Chaigneau on behalf of the Authors (24 Feb 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (03 Mar 2023) by Joanne Williams
RR by Anonymous Referee #1 (21 Mar 2023)
RR by Anonymous Referee #2 (31 Mar 2023)
ED: Publish subject to minor revisions (review by editor) (05 Apr 2023) by Joanne Williams
AR by Angelique Melet on behalf of the Authors (29 Apr 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (18 May 2023) by Joanne Williams
AR by Angelique Melet on behalf of the Authors (22 May 2023)  Manuscript 

Journal article(s) based on this preprint

20 Jul 2023
Impact of sea level changes on future wave conditions along the coasts of western Europe
Alisée A. Chaigneau, Stéphane Law-Chune, Angélique Melet, Aurore Voldoire, Guillaume Reffray, and Lotfi Aouf
Ocean Sci., 19, 1123–1143, https://doi.org/10.5194/os-19-1123-2023,https://doi.org/10.5194/os-19-1123-2023, 2023
Short summary
Alisée A. Chaigneau, Stéphane Law-Chune, Angélique Melet, Aurore Voldoire, Guillaume Reffray, and Lotfi Aouf
Alisée A. Chaigneau, Stéphane Law-Chune, Angélique Melet, Aurore Voldoire, Guillaume Reffray, and Lotfi Aouf

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Short summary
Wind-waves are a major driver of coastal environment changes and can drive coastal marine hazards such as coastal flooding. In this paper, by using numerical modeling along the Atlantic European coastline, we assess how much wind-wave characteristics will change at the end of the century due to sea level rise. For example, significant wave height and wave setup extreme events will be increased by up to +20 % and +10 % respectively when considering mean sea level rise.