While Alan Robock is right re "the best analog", this does not mean it is a good analog (because of timescale differences). This is an unresolved issue -- and some of the studies that have begun to address this issue are of very limited value because the GCMs used are very poor at simulating the present-day monsoon. An a priori requirement for using a GCM in this context is that it gives a good simulation of the present-day monsoon. I do not know of any studies that have checked this -- if I'm wrong, please let me know.
Tropospheric aerosols are not a good or useful analog. The response to tropospheric aerosols depends on the emissions pattern. (There are many other reasons why trop aerosols are a useless analog.) Tom. ++++++++++++++++++++++++++ Manu Sharma wrote: > On Tue, Sep 8, 2009 at 3:38 AM, Alan Robock <rob...@envsci.rutgers.edu > <mailto:rob...@envsci.rutgers.edu>> wrote: > > > However the effects of volcanic eruptions on the monsoon are not > equivocal, and they are the best natural analog we have for SRM > > > Perhaps the best analog to SRM is the phenomenon of global dimming and > its links [1] with the Ethiopia famine of mid 80's that was caused due > to shifting rainfall and killed a million people. > > It seems to me that this list is in denial of possible adverse impacts > of SRM on rainfall patterns. > > Manu > > 1. Rotstayn and Lohmann, 2002: Tropical Rainfall Trends and the Indirect > Aerosol Effect > <http://ams.allenpress.com/amsonline/?request=get-abstract&issn=1520-0442&volume=015&issue=15&page=2103> > > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to geoengineering@googlegroups.com To unsubscribe from this group, send email to geoengineering+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en -~----------~----~----~----~------~----~------~--~---
