Why Kimberley tides climb 10 metres while most coasts barely move
The Moon's gravitational pull creates tidal bulges, but coastal shape amplifies them dramatically in regions like the Kimberley.
Western Australia's Kimberley coast sees tides that climb more than 10 metres, roughly the height of a three-storey building. Most coasts experience much smaller tidal swings.
The Moon's gravity pulls ocean water toward it, creating bulges on opposite sides of Earth. As Earth rotates, different coasts move in and out of these bulges.
Coastal geometry amplifies these tides through resonance: when a bay's natural rhythm matches the local tidal cycle, each movement reinforces the next. Canada's Bay of Fundy reaches 16 metres through the same effect.
Underwater mountains and ridges also affect how tides flow.
- Over 10 metres
- Kimberley tidal range
- 16 metres
- Bay of Fundy tidal range
- Much closer distance
- Moon's advantage over Sun
- 2
- Daily high tides at most coasts
Why it mattersTidal differences shape coastlines, affect marine ecosystems and communities, and influence melting of Antarctic ice shelves.
AustraliaAustralia's Kimberley has Earth's most dramatic tides, affecting coastal planning, shipping routes, and marine management in the region.
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