"Ulysses in Ilium" <dcholiman@xxxxxxx> wrote in message
> IEJ wrote:
> > David,
> > you missed it this time. In 19th and early 20th century, up to 1921,
> > were two theories regarding the waterlevels in the North Sea:
> > * one group tried to hold up their thesis that it was the North Sea area
> > that was sinking.
> > * one group that the water was rising.
> > Now there are areas in the North Sea where land is sinking, due to land
> > tipping in North of Scandinavia when landrise after Ice Age still rises
> > faster than in mid-Scandinavia. But that's only one of the processes and
> > waterlevel today is a much more complicated still continued process
> > involves many factors and process.
> > Reason for my subjectline was the text in the Encyclopedia to which I
> > refered in order to establish that we in Sweden, at least we, had long
> > about the waterrising 154 meter (it's the correct figure for the maxium
> > level, the lower values some give hasn't taken waterlevel changes in
> > Age and Saxon Age into consideration).
> > Inger E
> Why? Why is the North Sea littoral sinking ?
> Is the Scandinavia plate subducting under Great Britain ?
> Be careful with your answer, because a pro geologist
> may be watching your science.
> Cheers, David H
I will try to give a resonable short answer here.
We have two geologic 'phenomena' which have a major impact on the North Sea:
* First we have the lift up force due to the Ice Core's withdravel which on
one hand makes the parts north of a line over land from mid Halland to mid
Småland rise and the parts below slowly sink due to the Fennoscandian part
of the European techtonical plate. When the rising is as it is quicker in
north than in south you will have a inclinated landarea.
Now the impact of this is that today the Baltic Sea each year loose
10.000.000.000 cubic meter water. Or as we say here in Sweden 10 miljard
cubic meter water. Source: Horn Anna red., Från Arkösund till Kråkelund,
Oskarshamn 1978 page 2. (same figure give or take 1-2000 cubic meter been
the figure up to today).
As you know there are only a few outlet from the Baltic Sea worth nothing
either the Öresund or the 'Lilla och Stora Bält'. All that water fills up
into the North Sea and than on into the Oceans.
* the other 'phenomena' is the movements from the Atlantic Ridge towards
land. When two techtonical plates moves together either they collide or one
'moves' under the other or both goes down in the area where they meet.
These phenomena together causes the so called 'sinking' most part of the
'sinking' is fictive and an illusion due to the large amount of water that
streams from the Baltic Sea. Some is real and due to that land in Jutland
and part of southern Sweden is sinking as some of the land in England is.
It's complicated to give a short answer for the reasons to this.
I have this from geologic data in works written by some of the best
Scandinavian geologists as well as one of the better American geologist.
Apart from which all this is basic information which ALL students here in
7th grade have to learn in subject 'Geography'. It's special chapters in