Heron, Mal, Domps, Baptiste, Guérin, Charles-Antoine, Wang, Manman, and Petersen, Leif (2024) HF Radar Real-Time Alert to a Tsunami-Like Disturbance at Tofino on January 5, 2020: Surge or Tsunami? IEEE Journal of Oceanic Engineering, 49 (1). pp. 105-113.

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Abstract

A real-time alert issued by a high frequency (HF) Wellen radar (WERA) at Tofino on January 5, 2020 was identified as a possible meteotsunami because of the anomalous surface currents. Reanalysis of the HF radar data and consideration of associated meteorological data from Global Forecast System North West Pacific forecasts, the GOES-17 weather satellite and the NDBC buoy at La Pérouse, indicate that the anomaly in ocean currents was a combination of a wind setup at the coast over several preceding hours and an abrupt change in wind direction driven by the passage of a severe cold front. It is unlikely that the Proudman resonance condition between the wind speed and gravity wave phase velocity existed, except perhaps very close to the coast. The inclusion of the wind direction measurements by the HF radar will improve the real-time alerts at the coast by discriminating between tsunamis and wind-driven storm surge events.

Item ID:	82777
Item Type:	Article (Research - C1)
ISSN:	1558-1691
Copyright Information:	© 2023 The Authors. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/
Date Deposited:	15 May 2024 07:01
FoR Codes:	40 ENGINEERING > 4015 Maritime engineering > 401503 Ocean engineering @ 100%
SEO Codes:	19 ENVIRONMENTAL POLICY, CLIMATE CHANGE AND NATURAL HAZARDS > 1904 Natural hazards > 190403 Geological hazards (e.g. earthquakes, landslides and volcanic activity) @ 100%
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