Curt D. Storlazzi
Ferdinand K.J. Oberle
Kurt J. Rosenberger
Eric K. Brown
Olivia M. Cheriton
2024
<div id="Abs1-section" class="c-article-section"><div id="Abs1-content" class="c-article-section__content"><p>The southern fringing reef along Ofu, American Samoa, has been a focus of coral research owing to the presence of super-heated pools on the reef flat, where corals thrive in elevated sea temperatures. Here, we present the first documentation of exceptionally large low-frequency (periods > 100 s) waves over this reef flat. During a large, southerly swell event, low-frequency waves on the inner reef flat had mean heights of 0.7 m and periods of 2–4 min and are estimated to have contributed up to 50% of the total water levels. One observed low-frequency wave had a trough-to-peak vertical height of 1.5 m, possibly representing the largest low-frequency wave ever directly observed on a reef flat. These large, low-frequency waves, which were likely amplified by reef resonance, are important factors in coastal hazards such as flooding and erosion and may also be relevant to coral health and resilience.</p></div></div>
application/pdf
10.1007/s00338-023-02453-w
en
Springer
Extreme low-frequency waves on the Ofu, American Samoa, reef flat
article