Life in General

Tidal Weirdness

April 8th 2010, 10:04am

These pictures (of St Brides Bay, Pembrokeshire) are taken on a falling tide.

The second is taken in exactly the same position, 2’40″ after the first.  In between, the water level rose gradually (the waves are very small – this is not an effect caused by one huge wave).  Over the next 2 – 3 minutes the water dropped back as if someone had pulled the plug out.  This pattern – significant variations in the water level, sort of “mini tides” – continued on a 2/3 minute cycle.

  • archel

    Big boat out beyond the bay somewhere?

  • archel

    Big boat out beyond the bay somewhere?

  • http://www.littlestorping.co.uk Simon Wood

    I would have thought that wake would come in frequent waves… possibly more frequent than “standard” waves, and certainly more than 2′ 40″.

    This stood out as being much more than the “every seventh wave is bigger” kind of variation, because the rise and fall was so much bigger than the waves themselves, even the biggest. But nor can I find a better explanation!

  • http://www.littlestorping.co.uk One-Ten

    I would have thought that wake would come in frequent waves… possibly more frequent than “standard” waves, and certainly more than 2′ 40″.

    This stood out as being much more than the “every seventh wave is bigger” kind of variation, because the rise and fall was so much bigger than the waves themselves, even the biggest. But nor can I find a better explanation!

«
»