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An Inspector Calls · Banned Joined: 27 Jan 2011 Posts: 965

Well if you read the posts on these pages, for which you are an administrator, you'd see that this point (about the sea being deposited on land as excess rain) has been raised and discussed previously, and I have been involved in those discussions.

Do try and keep up.

kenneal - lagger · Posted: Sun Sep 25, 2011 1:36 am Post subject:

I'll let readers decide if my comments were valid or not in the context of this particular thread, Inspector.
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It is very, very, very serious indeed. This is the big one!" Professor Tim Lang, APPGOPO, 25/03/08. And he was talking about food, not oil or the economy!

An Inspector Calls · Banned Joined: 27 Jan 2011 Posts: 965

lagger,

By all means.

But as to the pathetic allegation that I hadn't read the NASA news item, see here:
http://www.powerswitch.org.uk/forum/viewtopic.php?t=18942

eatyourveg · Joined: 15 Jul 2007 Posts: 1101 Location: uk

Gosh Inspector, you do have a gift for making friends.

I suggest you contact that charm school first thing tomorrow morning and demand a refund.
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An Inspector Calls · Banned Joined: 27 Jan 2011 Posts: 965

No need for that, Powerswitch is replete with affable, open-minded role models.

kenneal - lagger · Posted: Mon Sep 26, 2011 5:18 am Post subject:

I do apologise, Monsieur l'Inspecteur, that I didn't see the other thread but I do have a life and a couple of jobs so I do sometimes miss a thread. All us Administrators have jobs and lives, like most of the posters here, which is why there are quite a few of us to keep an eye on the goings on. I couldn't see where you had made those points in this thread.

I must pick you up on a mathematical point though. The graph in my post shows that sea level rise is increasing at a roughly linear rate, not that it is accelerating. For a graph to show an acceleration with a straight line one of the axes cannot be linear. Speed is in m/sec and acceleration is in m/sec/sec.

The article talks about an accelerating ice mass loss which is perfectly compatible with a linear increase in sea level because the shore line doesn't rise vertically, it slopes or even curves. So, assuming the density of the ice is constant, for every cubic metre of ice lost, more than a cubic metre of water is required to give a linear height increase because the area of the sea is increasing with every millimetre of height increase. Accelerating ice loss could even accompany a deceleration in the rate of sea level rise.
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It is very, very, very serious indeed. This is the big one!" Professor Tim Lang, APPGOPO, 25/03/08. And he was talking about food, not oil or the economy!

An Inspector Calls · Banned Joined: 27 Jan 2011 Posts: 965

clv101 · Posted: Mon Sep 26, 2011 2:25 pm Post subject:

It's not really area changes we need to consider. The big factors to take account of are: ocean volume changes due to the elastic and viscous response to mass movement, geoid changes as these mass movements change the distribution of the gravitational field, the steric components of temperature and salinity that change non-uniformly and ocean currents.

The upshot of this is that looking at absolute sea level data from remote sensing platforms or tide gauges is useless without factoring in the above.
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An Inspector Calls · Banned Joined: 27 Jan 2011 Posts: 965

Agreed.

And presumably melting land ice also plays a part?

Now try pulling that little lot apart to construct a global warming proxy.