Wednesday, November 25, 2009

Antarctica was 6 degrees warmer than now

In spite of all the Holocene denying, hysterical wailing about how we are going to melt Antarctica, the science says, not so. My last week's Nature arrived yesterday (yeah the post office is slow). In it was an article L. C. Sime et al, "Evidence for warmer interglacials in East Antarctic ice corese," Nature 462 (2009), p. 342

The article makes the amazing claim that 3 times over the past 340,000 years, Antarctica has been as much as 6 degrees centigrade hotter than it is today. And looking at the widths of the deuterium data he used, it was that hot for at least 1000-1500 years EACH TIME!.

The abstract says

Here we analyse the three available 340 kyr East Antarctic ice core records alongside input from GCM modelling. We show that for warmer interglacial periods the relationship between temperature and the isotopic signature varies among ice core sites, and that therefore the conversions must be nonlinear for at least some sites. Model results indicate that the isotopic composition of East Antarctic ice is less sensitive to temperature changes during warmer climates. We conclude that previous temperature estimates from interglacial climates are likely to be too low. The available evidence is consistent with a peak Antarctic interglacial temperature that was at least 6 K higher than that of the present day —approximately double the widely quoted 3+/-1.5 K

Yes, Antarctica has, in the past been 6 deg C hotter than at present for as long as 1000-1500 years and it didn't slide into the sea.

Happy Thanksgiving

1 comment:

  1. No good. The Earth is expected to warm much faster at the poles than average. So if the IPCC predicts a 6C rise overall, that amounts to a 15-20C rise at the poles.

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