... De discussie op het forum (UK science weather) concentreert zich op tijdelijke daling van de zeespiegel vanwege activiteit tropische cyclonen op de oceaan. Ik vind het wel een interessant fenomeen, maar dan moet het inderdaad ook hier wel meetbaar zijn! 'k Vraag me alleen af hoe het werkelijk in elkaar steekt...
Hier een samenvatting van discussie:
Persoon 1:
"As I walked by dog along the beach this morning I noticed the sea was very strange - the
sea was flat with no wind, but the draw-back was about 20 feet. I asked the fisherman
about it, and they said it's about 20 years since they'd seen such a phenomena, just
before the Great Hurricane. At high tide early this morning it was even more
marked - little water, but a long and strong draw-back. Their nets were full of
sediment - few fish, as 'they have dig in'. Now is this the result of the Katrina,
or a forcast of the storm to coming tomorrow?"
Persoon 2:
Probably a very long wavelength swell,
Apparentlly swells coming around Cape Horn, can reach Cornwall, and still be
around 2 foot or so, but the wavelength is very long. So they appear as a
rise & fall in sea level, rather than a real wave.
About 5 years ago the lifeguards had to close some of the north coast
Cornwall beaches for just this effect. The water could be ankle deep one
minute, and waste deep the next, and the surge up out down the beach was causing strong rip currents"
Nick
Hier een samenvatting van discussie:
Persoon 1:
"As I walked by dog along the beach this morning I noticed the sea was very strange - the
sea was flat with no wind, but the draw-back was about 20 feet. I asked the fisherman
about it, and they said it's about 20 years since they'd seen such a phenomena, just
before the Great Hurricane. At high tide early this morning it was even more
marked - little water, but a long and strong draw-back. Their nets were full of
sediment - few fish, as 'they have dig in'. Now is this the result of the Katrina,
or a forcast of the storm to coming tomorrow?"
Persoon 2:
Probably a very long wavelength swell,
Apparentlly swells coming around Cape Horn, can reach Cornwall, and still be
around 2 foot or so, but the wavelength is very long. So they appear as a
rise & fall in sea level, rather than a real wave.
About 5 years ago the lifeguards had to close some of the north coast
Cornwall beaches for just this effect. The water could be ankle deep one
minute, and waste deep the next, and the surge up out down the beach was causing strong rip currents"
Nick
Bericht laatst bijgewerkt: 14-09-2005 17:51
