The AGU Fellows program recognizes members who have made exceptional contributions to the Earth and space sciences. The first class of AGU Fellows was elected in 1962, and AGU bylaws require that the size of a Fellows class be limited to no more than 0.1% of the total AGU membership. During the 2011 Fall Meeting, the AGU Council voted to align the nomination cycles for all Union honors. AGU will accept Fellows nominations for the class of 2013 from 15 January to 15 March 2013 and will announce elected Fellows in July 2013. The individuals listed below have been elected as the 2012 class of Fellows and will be recognized during the honors ceremony at the 2012 AGU Fall Meeting, 6–10 December.