Revisiting the anomalous shelf water oscillation of Buckles Bay, Macquarie Island

• Published in: Continental Shelf Research
• Main Authors: Galton-Fenzi, B.K., Scott, W.D., Farrow, D.E., Handsworth, R.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier BV 2006
• Subjects: Macquarie Island
• Online Access: https://doi.org/10.1016/j.csr.2006.07.010; https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Revisiting-the-anomalous-shelf-water-oscillation/991005540371307891; https://researchportal.murdoch.edu.au/view/delivery/61MUN_INST/12135202430007891/13137087120007891

Historic observations of sea-level on Macquarie Island recorded an ∼ 6 min oscillation with a perceived beat of ∼ 3 h, interpreted as two counter-rotating edge waves of slightly different frequencies. Alternative evidence is presented here that the oscillations are consistent with the fundamental shelf period of Buckles Bay; an envelope characteristic of local coast and shelf features. New data from a shore-mounted tide gauge, analyzed using fourier and wavelet techniques, show an ∼ 6.6 min phenomenon occurring in bursts every 1-4 h. A simple model shows that the fundamental resonant frequency may spread and comply with maximum and minimum coast and shelf features.