----- Original Message ----- From: "Don Libby" <[EMAIL PROTECTED]> Newsgroups: gmane.science.general.global-change Sent: Thursday, September 07, 2006 8:28 AM Subject: [Global Change: 583] Re: "Tipping points" again
> Right, maintaining ice caps is a good motivator, but what level of > atmospheric CO2 stabilization is sufficient to avoid melting the ice caps? > 440? 380? Less? A piece of the puzzle from http://www.grida.no/climate/ipcc_tar/wg1/358.htm suggests that stabilization at 2x pre-industrial atmos CO2 concentration would lead to stable air temperature increase of 2-4 degrees C over present. The missing piece: is air temperature increase of 2-4 degrees C sufficient to melt the polar ice sheets over 4-5 thousand years? -dl --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
