01 Jun 2023
 | 01 Jun 2023

Proposal for a new meteotsunami intensity index

Clare Lewis, Tim Smyth, Jess Neumann, and Hannah Cloke

Abstract. Atmospherically generated coastal waves labelled as meteotsunami are known to cause destruction, injury and fatality due to their rapid onset and unexpected nature. Unlike other coastal hazards such as tsunami, there exists no standardised means of quantifying this phenomenon which is crucial for understanding shoreline impacts and to enable researchers to establish a shared language and framework for meteotsunami analysis and comparison.

In this study, we present a new 5-level Lewis Meteotsunami Intensity Index (LMTI) trialled in the United Kingdom (UK) but designed for global applicability. A comprehensive dataset of meteotsunami events recorded in the UK was utilised and the index's effectiveness was evaluated, with intensity level and spatial distribution of meteotsunami occurrence derived. Results revealed a predominant occurrence of Level 2 moderate intensity meteotsunamis (69 %) in the UK, with distinct hotspots identified in Southwest England and Scotland. Further trial implementation of the LMTI in a global capacity revealed its potential adaptability to other meteotsunami prone regions facilitating the comparison of events and promoting standardisation of assessment methodologies.

Clare Lewis et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comments on Proposal for a new meteotsunami intensity index.', David Williams, 01 Jun 2023
    • AC1: 'Reply on CC1', Clare Lewis, 03 Jun 2023
  • RC1: 'Comment on egusphere-2023-1147', Anonymous Referee #1, 05 Jun 2023
    • AC2: 'Reply on RC1', Clare Lewis, 28 Jun 2023
  • RC2: 'Comment on egusphere-2023-1147', Anonymous Referee #2, 21 Jul 2023
    • RC3: 'Reply on RC2', Anonymous Referee #2, 21 Jul 2023
      • AC5: 'Reply on RC3', Clare Lewis, 06 Sep 2023
    • AC4: 'Reply on RC2', Clare Lewis, 06 Sep 2023
  • RC4: 'Comment on egusphere-2023-1147', Anonymous Referee #2, 07 Aug 2023
    • AC3: 'Reply on RC4', Clare Lewis, 31 Aug 2023

Clare Lewis et al.


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Short summary
Meteotsunami are the result of atmospheric disturbances creating water waves which can impact coastlines causing injury and loss to life and assets. This paper introduces a novel intensity index to allow for the quantification of these events at the shoreline which has the potential to assist in the field of natural hazard assessment. Trialled in the UK with a view to global applicability and to becoming a widely accepted standard in coastal planning, meteotsunami forecasting and early warning.