Dr John Stockton wrote in message
...
JRS: In article , dated Fri, 7 Jul 2006
12:17:04 remote, seen in news:uk.sci.astronomy, n cook
posted :
Dr John Stockton wrote in message
...
JRS: In article , dated Thu, 6 Jul 2006
06:44:04 remote, seen in news:uk.sci.astronomy, n cook
posted :
According to a local old sea dog, there is a 50 year cycle to the
height
of
tides superimposed on the usual new/full moon / sun distance, cyclic
variation.


http://geography.berkeley.edu/people...oam/2%20Litera
t
ure.pdf

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has mention of a 31 year cycle on top of the perigean cycles but the
maths
is all rather daunting, nice to see reference to one of my favourite
words ,
as a word that is, syzygy unfortunately not even any use in Scrabble- too
many "y"s 3 not 2.

But is there any reference to the cycle having been noticed by tidal
observers?

What's the biggest-scoring legal move in Scrabble?


To another article :

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I've been playing with freeware WXTide32 tide calculator, I've no idea what
underlying equations it uses.
I've old tide tables for 1989 and 1992 and also looking at current
predictions the results all agree to no more than 4 minutes out in time of
highs and lows or 0.1m in predicted heights.
I've run it for all days from 1980 to 2020 and most years the maximum high
tide is one or more 5.1m but in all those 40 years no 5.2m or higher
predicted for my nearest "station" of Portsmouth. I was expecting to see
some sort of cyclic nature to the extreme peaks.
My concern is marine flooding to low lying coastal area, but as it stands
low barometric pressure, analysing past flooding events, seems to have more
influence than astronomic tides.