The key messages were developed during technical discussions and
expert deliberation at a two - day meeting of the eight chapter Lead Authors, plus Susan Hassol and
Daniel Glick, held in Boulder, Colorado May 8 - 9, 2012; through multiple technical discussions via six teleconferences from January through June 2012, and an author team call to finalize the Traceable Account
draft language on Oct 12, 2012; and through other various communications on points of detail and issues of
expert judgment in the interim.