2011-08-30 11:04:17Antarctic ice mass loss
Agnostic

mikepope_9@hotmail...
118.208.151.27

I am trying to reliable estimates of ice loss for WAIS and EAIS in 2000 and 2010.  Can anyone advise or point me in the right direction please?

2011-08-30 17:35:04
MarkR
Mark Richardson
m.t.richardson2@gmail...
134.225.187.197

For 2010 look up the people who do GRACE measurements. Velicogna could probably point you in the right direction.

2011-08-30 17:57:16
Rob Painting
Rob
paintingskeri@vodafone.co...
118.92.41.219

Indeed, Velicogna is a co-author in this study: 

Acceleration of the contribution of the Greenland and Antarctic ice sheets to sea level rise - Rignot (2011)

2011-08-31 15:22:02
Agnostic

mikepope_9@hotmail...
118.208.151.27

Thanks for that.  Rignot confirms my thinking that Antarctica is contributing to SLR at an accelerating rate

2011-08-31 16:34:37
Rob Painting
Rob
paintingskeri@vodafone.co...
118.92.41.249

Agnostic - check this paper: The Role of Ocean Thermal Expansion in Last Interglacial Sea Level Rise - McKay (2011), it was the subject of this SkS post - Rising Oceans too late to turn the tide?

I know most people don't think that far ahead, but within several centuries all the world's coastal cities will be submerged. It is too late to turn back the tide, the oceans will warm for millenia and the West Antarctic icesheet will collapse.

You'd think amongst that rabble of world politicians, there'd be at least one, just one, driven by an overwhelming sense of justice.  

2011-09-01 11:34:10
Agnostic

mikepope_9@hotmail...
118.208.151.27

Thanks Rob - I did read Too Late to Turn the Tide - it is of course too late - and I will read McKay 2011.

If Hansen et al 2011 is right (he probably is) we will not have to wait for several centuries, only one, to see coastal cities submerged. I suspect that thermal expansion will play a minor role compared to polar ice loss.  Although Greenland is going gang-busters, I think WAIS poses the real threat.  Being a marine ice sheet, it is so much more vulnerable to attack from beneath by warming ocean water.  5 years ago I would never have believed that PIG or Thwaites would collapse so rapidly!

I do wonder why climate scientists seem so wedded to the idea that SLR of 1m by 2100 is the maximum that can be expected or that it will be linear when neither is really true.

As for the Pollies.  Well!  What can one say.  At least in Oz, Gillard seems to be heading in the right direction - though I suspect it is only because she is being driven by the need for Green support to stay in office.

2011-09-01 12:39:28
Rob Painting
Rob
paintingskeri@vodafone.co...
118.92.56.137

You've probably got enough to keep you going for your post, but a couple of recent studies on the Antarctic ice sheet reveal huge mass losses during the Pliocene. In fact whole iceberg armadas were set adrift during the melt.

When the ozone hole is fixed (probably decades from now) the Antarctic is probably going to really heat up.

And, I don't think that scientists are wedded to 1m SLR by century's end, it's just that ice sheet modelling is in its primitive early stages.