The AMS Draft Statement on Geoengineering the Climate System is available via the AMS home page now...

If you have comment on this draft AMS Statement currently under
consideration, you may transmit those comments to the AMS Council by
sending a message to the following e-mail address by April 23 2009:
statement_comments@ametsoc.org

AMS Policy Statement on Geoengineering the Climate System
Draft 7 March 2009

Human activities have very likely caused most of the well-documented
change in global climate over the last half century. Unchecked future
greenhouse gas emissions, particularly of carbon dioxide from the
burning of fossil fuels, will almost certainly lead to additional
climate impacts such as further global warming, continued sea level
rise, greater rainfall intensity, more serious and pervasive droughts,
enhanced heat stress episodes, ocean acidification, and the disruption
of many biological systems. The resulting inundation of coastal areas,
severe weather impacts, and loss of ecosystem services will likely
cause major negative impacts for most nations.

Geoengineering could conceivably offer targeted and fast-acting
options to reduce acute climate impacts and provide strategies of last
resort if abrupt, catastrophic, or otherwise unacceptable climate
change impacts become unavoidable by other means. However,
geoengineering must be viewed with great caution because manipulating
the Earth system is almost certain to trigger some adverse and
unpredictable consequences.