Comments on: Global Warming, the Blog Epic ~ 06 ~ A Glacial Cycle

By: eddie

eddie — Sun, 18 Jan 2009 12:05:47 +0000

[quibble] You seem to be using isotopic and isotropic interchangeably. Is it a typo or am I? [/quibble]

By: aporeticus

aporeticus — Sat, 17 Jan 2009 14:15:33 +0000

Hi Greg, this post doesn't show up in the series.

By: Len

Len — Sat, 17 Jan 2009 09:42:33 +0000

“On this graph, higher values correspond with warmer periods … periods when there is less of the world’s water trapped in glacial ice … and lower values represent cooler periods … when less of the world’s water is in the glaciers.”

Typo on the last “less”? Cooler periods would put *more* water in the glaciers?

By: Joel

Joel — Sat, 17 Jan 2009 09:09:26 +0000

You wouldn’t happen to have the series in a convenient easy to download single document?

By: khan

khan — Fri, 16 Jan 2009 23:55:29 +0000

I very much appreciate these explanations.

By: bigTom

bigTom — Fri, 16 Jan 2009 19:07:59 +0000

Since Oxygen isotope ratios are also used as a proxy for average ice surface temperature for ice core data, I assume there is some temperature dependence during the formation of precipitation, and perhaps other processes. Does this complicate the O18 versus volume of ice relationship? Also I had the impression that the ratio for biologically formed stuff may also be affected by the temperature (although deep ocean waters tend to have pretty constant temps). But in any case, I suspect there are some (hopefully second order) corrections that you didn’t want to bore us with?