On 1 Oct, 22:39, Rodney Blackall
wrote:
In article , Yokel





wrote:
"Rodney Blackall" wrote in message
.. .
| Another point worthy of consideration is a bye-product of a POSSIBLE
| shut down or diversion of the North Atlantic gyre which brings the N.
| Atlantic Drift to our shores. Centrifugal and vortical forces cause the
| sea surface to be slightly dish shaped around a cyclonic gyre, dome
| shaped over its counter circulation; stop them and you get changes.
| Whether this is a *"good thing" depends on where you are and which gyres |stop/move!
|
Do you mean "North Atlantic Gyre" or "North Atlantic Drift". *There is
some talk of a possible shutdown / slowdown of the ocean circulation
which is generated by cold, salty water being left when sea ice forms.
This sinks towards the ocean floor, returning equatorwards at depth and
so drawing more water of tropical origin into the Arctic basin, passing
the UK and Norway along the way.

[Snip]
Does not matter what you call it, if any eddy subsides or moves away there
will normally be some sort of sea level change.

--
Rodney Blackall (retired meteorologist)(BSc, FRMetS)
Buckingham, ENGLAND
Using Acorn SA-RPC, OS 4.02 with ANT INS and Pluto 3.03j- Hide quoted text -

The problem with the gyres (sea surface to radiation depths) and
thermo haline columns (sub insolation interfence) is that they do not
mix well.

The situation is similar to that of low surface atmosphere and the
rest of the troposphere. One is encumbered by the shape of the surface
(so called friction) whilst the other is free to move subject to water
vapour behaviour.

Above the tropospherthe problem is a layer of interaction where the
temperature gradient rises thus presumably open to a lot of feedback
from temperature changes -day and night and whatever.

Above that the various radiation belts and whatever are subject to
stuff we are not really sure of.

And then there is the gyroscope effect of a loose cannon. I imagine
this is the source of upper sea level behaviour so resistable to
scientific elucidation.

I can't see how the peturbation effect on the atmosphere works out.
Water has a poor enough friction/viscocity to make me cower.
Atmospherics are way beyond my grasp.

But there is one thing I can't hold with and that is the values put on
columns of air said to rotate because of the Coriolis effect.

1. It would only work on one edge of the vortex. The other side would
be going the other way. And

2. The direction of cyclones varies with the region of the ocean they
occur in.

I wish I could say that they follow the Anticyclone over the Azores
the way a Blocking High causes streams to divert. But that isn't the
case with a lot of them either.

Ah well. Time to go.

By by children.


















And Dawlish.