Invited public lecture, "The Science of Climate Change",'EarthTalks' Seminar Series, Earth and Environmental Systems Institute,
Penn State Univ, University Park, PA, September 17, 2007
Invited public lecture, "Global Climate Change: Past and Future",Pennsylvania Consortium for Interdisciplinary Environmental Policy
and the Pennsylvania Environmental Council, Harrisburg PA, Oct 5, 2006
Invited lecture, "Climate Change and Global Warming",
Symposium on 'Energy for the 21st Century' , University of Massachusetts, Amherst, MA, April 9, 2005
Invited lecture, 'Climate over the Past Millennium or So',
Symposium on Whole Earth Systems (Honoring Stephen Schneider), Stanford University, Palo Alto, CA,
Feb 10, 2005.
Session introduction,
Invited session on "Climate Change Detection &
Attribution", National Academy of Sciences Frontiers of
Science annual symposium, Irvine, California, Nov 9, 2001.
Public lecture,
'Global Warming'
, Undergraduate Environmental Science Organization ('ESO') Global
Warming Forum, University of Virginia, February 20, 2001