Amphidromic Points in The M2 Tidal Constituent
Based on the accompanying figure, the set of clockwise amphidromic points includes:
- north of the Seychelles
- near Enderby Land
- off Perth
- east of New Guinea
- south of Easter Island
- west of the Galapagos Islands
- north of Queen Maud Land
Counterclockwise amphidromic points include:
- near Sri Lanka
- north of New Guinea
- at Tahiti
- between Mexico and Hawaii
- near the Leeward Islands
- east of Newfoundland
- midway between Rio de Janeiro and Angola
- east of Iceland
The islands of Madagascar and New Zealand are amphidromic points in the sense that the tide goes around them (counterclockwise in both cases) in about 12 and a half hours, but the amplitude of the tides on their coasts is in some places large.
Note that the rotational direction of tides around an amphidromic point bears no relationship to its location relative to the equator.
Read more about this topic: Amphidromic Point
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