What Can Hurricane Sam (2021) Tell Us About Extreme Ocean Waves Under Tropical Cyclones?
Abstract
We investigate the ocean wave eld under Hurricane SAM (2021). Whilst measurements of waves under Tropical Cyclones (TCs) are rare, an unusually large number of quality in situ and remote mea- surements are available in that case. First, we highlight the good consistency between the wave spectra provided by the Surface Waves Investigation and Monitoring (SWIM) instrument onboard the China- France Oceanography Satellite (CFOSAT), the in situ spectra mea- sured by National Data Buoy Center (NDBC) buoys, and a saildrone. The impact of strong rains on SWIM spectra is then further investi- gated. We show that whereas the rain de nitely a ects the normalized radar cross section, both the innovative technology (beam rotating scanning geometry) and the post-processing processes applied to re- trieve the 2D wave spectra ensure a good quality of the resulting wave spectra, even in heavy rain conditions. On this basis, the satellite, air- borne and in situ observations are confronted to the analytical model proposed by Kudryavtsev et al (2015). We show that a trapped wave mechanism may be invoked to explain the large signi cant wave height observed in the right front quadrant of Hurricane SAM.
Domains
Oceanography
Fichier principal
JGR Oceans - 2024 - Zhao - What Can Hurricane Sam 2021 Tell Us About Extreme Ocean Waves Under Tropical Cyclones-1.pdf (10.92 Mo)
Télécharger le fichier
Origin | Publisher files allowed on an open archive |
---|---|
Licence |