Both these banner pics are taken at our very own Boulder Bank... how pretty (one is Franzi's, one mine)
Both of these clips show big waves- but they are behaving very differently... I wonder what that is all about??
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From swellmapTaken on June 9, 2013
Yep that's 7m waves out there! And 8m down by the Auckland Islands!! |
Same day,
quite pleasant in Tasman Bay....what's up with that? |
maybe the weather map for this day would shed some light
A bit of a quizz...
Look at this news June 14, 2015 then check out the swell map and the surface pressure map for the same time period. Explain why Wellingtons south coast got smashed. It was a quarter moon that day, things could have been worse, explain?
Look at this news June 14, 2015 then check out the swell map and the surface pressure map for the same time period. Explain why Wellingtons south coast got smashed. It was a quarter moon that day, things could have been worse, explain?
Some questions:
- what 3 things make waves in the ocean?
- what 3 things affect the size of waves?
- how does the water move in a wave? (that surfer dude shows it nicely!)
- how does energy move & how far can it move?
- what is swell vs sea
- what do these words mean: crest, trough, wavelength, height, period, wave trains
- how does the energy of a wave change as it gets bigger?
- why do waves break when they get close to shore?
- what happens when waves meet other waves?
- what are internal waves? bit of a taster here
- and what is the importance of internal waves as far as ocean productivity goes
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Quite a bit it turns out.... read on
.... that energy can travel a wee distance then!
The stink Boxing Day, 2004 one was even worse, here is how it moved some energy
how safe is Kaikoura?