Ice core temperatures are local so these paleorecords aren't directly comparable to global means.
http://en.wikipedia.org/wiki/Proxy_%28climate%29#Water_isotopes_and_temperature_reconstruction "since ocean temperatures are relatively stable the δ value mostly reflects the temperature where precipitation occurs" === Also, temperatures atop the Antarctic ice sheet have been falling of late. http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17257 http://www.pewclimate.org/global-warming-basics/antarcticfactsheet " surface warming from the greenhouse effect is weaker in the southern hemisphere than in the northern hemisphere, whereas cooling from stratospheric ozone depletion is stronger in the south than in the north. Consequently, the Arctic has warmed dramatically, even as the Antarctic has experienced a small cooling trend. Climate models reproduce this pattern when they are driven by both greenhouse gas increases and stratospheric ozone depletion (Gillett and Thompson 2003; Shindell and Schmidt 2004). Hence, the present cooling of Antarctica is consistent with the rest of the Earth's surface warming in response to rising greenhouse gas concentrations." === Maybe you would do better to look at Greenland core data vs Greenland surface data? There are paleo proxies of global temperature from benthic foraminifera deposits but they don't have decadal resolution. mt --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups Global Change ("globalchange") newsgroup. Global Change is a public, moderated venue for discussion of science, technology, economics and policy dimensions of global environmental change. Posts will be admitted to the list if and only if any moderator finds the submission to be constructive and/or interesting, on topic, and not gratuitously rude. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/globalchange -~----------~----~----~----~------~----~------~--~---
