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I agree that volume will increase linearly with se level if the area
does not change, but my point is precisely that in the real world as
sea level rises the area will increase.

On 7/8/06, George Huxtable  wrote:
>
> Responding to Frank's posting, Marc Bernstein wrote-
>
> | Sea level rise may appear linear but that does not mean that the
> | increase in volume of the oceans is linear.
>
> Yes, it does. Increase in ocean volume, over a very wide range, will
> be very precisely proportional to rise in sea-level. Not until the
> level has changed so much as to make a noticeable difference to the
> overall AREA of the oceans will there be the slightest departure from
> linearity.
>
> ===================
>
> Frank wrote-
>
> | > Tide gauge data  --available online-- shows a linear increase in
> sea level
> | > over the past 150  years. For example, here's the historical tide
> gauge data for
> | > The Battery in  southern  Manhattan:
> | >
> http://tidesandcurrents.noaa.gov/sltrends/sltrends_station.shtml?stnid=8518750
>
> Here, I think that Frank was being somewhat over-simplistic in
> relating change in overall sea level to one location, even as an
> example.
>
> Such local changes respond not only to change in sea level, but also
> to changes in land level, which can be rising or falling.
>
> For example, even within the limited extent of the geology of the UK,
> although in some parts of the coast sea levels are rising, in others
> they are falling. By choosing your location, you could make whatever
> predictions you thought fit.
>
> I am not knowledgeable about American geology, but understand that
> even something as solid and massive as the Laurentian shield is still
> recovering, rising and tilting, after release from the enormous
> overburden of the ice ages, comparatively recent in geological terms.
> Which has given rise to the changes in drainage of the Great Lakes
> basin, once having been via the Mississippi, then the Hudson, now the
> St Laurence.
>
> However, I would not disagree with the point Frank was making.
>
> George.
>
> contact George Huxtable at george@huxtable.u-net.com
> or at +44 1865 820222 (from UK, 01865 820222)
> or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.
>
>
> >
>

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