Meteotsunami generation by tropical cyclone rainbands: nearshore effects of rainband dynamics and storm surge

• DOI: 10.1002/essoar.10502952.1
• Publication Date: 2020-05-02T11:04:45Z
• Authors: Katherine Anarde; Wei Cheng; Marion Tissier; Jens Figlus; Juan Horrillo
• Keywords: Storm Surge; Eye; Tide gauge

During tropical cyclones, meteotsunami waves can be triggered by atmospheric disturbances accompanying cyclone rainbands (TCRs). Due to a paucity of high resolution field data along open coasts during these extreme events, relatively little is known about generation TCRs and the coastal impact wave phenomena. Here we link high-resolution measurements sea-level air pressure from Hurricane Harvey (2017) with numerical model show that large drops in trains very narrow initiate O(40 cm) height distant storm center (>200 km). The resonant-amplification propagation generated forcing highly dependent on oceanographic (storm surge, bathymetry, morphology) factors (variable TCR forward speed, path translation). We discover hazard extend several days before after hurricane landfall, are more ubiquitous coast than tidal gauge records suggest, likely due highly-localized inherent structure TCRs. This combined study identifies potential, but sometimes localized conditions necessary, for modify processes (e.g., overwash, beach erosion) serve as flood impact.