James Annan wrote: > [EMAIL PROTECTED] wrote: > > >>The SRES A series scenarios are generally the bad, or business as > >>usual, ones, with A2 probably being the most studied of the group. The > >>B series would be the predictions for various attempts at making cuts > >>in emissions > > > > [other than greenhouse gases.] > > > > I thought all SRES scenarios explicitly excluded any attempts at > > reducing emissions of greenhouse gases. > > Yes and no. They exclude any deliberate attempts to cut GHG emissions > which might be made for the specific purposes of mitigating climate > change, but they include any deliberate attempts which we might make to > cut the emissions of GHGs for any other reasons (such as due to other > other environmentally disagreeable effects they might have), and they > also include the effect of any cuts that might occur as a more-or-less > incidental consequence of other policies or non-policies (energy > efficiency, energy independence, technological advances, population > changes, ...).
I must admit, I've never really understood the philosophy of the B series. Imagine a world characterized by a "high level of environmental and social consciousness" AND imagine they take no specific steps to address climate change. Yet overall emissions go down because we want to reduce pollution, energy intensity, and fossil fuel dependancy. This strikes me as a fantasy scenario that can't possibly occur, how can an environmentally conscious world also ignore the concern over climate change? I assume the point is to discuss what might happen in the absence of specific action against climate change, but even so, I think it would make more sense to also include scenarios where the environmentally conscious world takes some plausible degree of action against climate change and consider what level of mitigation seems plausibly achievable. -Robert A. Rohde http://www.globalwarmingart.com/ --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
