2004. Coral Reefs in a Greenhouse Earth Invited speaker, Ocean Studies Board (National Acadamies), Monterey, CA, 11 Mar 2004.
2004. (with Bob Buddemeier) Coral reefs and climate change. Invited speaker, "You have never seen a reef like this before", 2004 AAAS meeting, Seattle, WA, 12-16 Feb 2004. pdf
2003. Seawater chemistry change in a greenhouse Earth and why some scientists worry about it. Invited speaker, "Coral Reefs, Climate, & Coral Bleaching", Oahu HI, 18-20 Jun 2003.
2003. Calcium carbonate budgets -- the basic framework. Invited speaker, "The Effects of Combined Sea Temperature, Light, and/or Carbon Dioxide on Coral Bleaching, Settlement and/or Growth", 1st Annual Combined Effects Think Tank to Support CREWS Modeling. Lee Stocking Island, Bahamas, 20-24 Jan 2003. pdf
2003. (with S. Doney and other members of the CCSP-Oceans Interim Committee). An Ocean Research Component to the U.S. Carbon Cycle Science Program (CCSP-Oceans). Poster, "Ocean Biogeochemistry and Ecosystems Analysis," OCEANS: International Open Science Conference, Paris, France, 7-10 Jan 2003.
2002. The science behind the coral reef crisis . National Center for Atmospheric Research, Nov 2002.
2001. The biology of calcification in corals . Invited speaker, "US JGOFS Workshop on the Role of Calcification in the Marine Carbon Cycle", Woods Hole, MA.
2001. The geochemistry of calcification in corals . Invited speaker, "US JGOFS Workshop on the Role of Calcification in the Marine Carbon Cycle", Woods Hole, MA.
2000. Overview of CO2 -induced changes in seawater chemistry. 9th Int. Coral Reef Sym., Bali, Indonesia (co-chaired this session with Chris Langdon on coral reefs and future seawater chemistry changes). pdf
2000. (with SC Doney) The NCAR Community Climate System Model - characteristics, results and applicability in predicting marine ecosystem response to global climate change. 9th Int. Coral Reef Symp., Bali, Indonesia.
1998. Defining "coral reef" for the age of global change . Invited Keynote Speaker, International Society of Coral Reefs, Annual European Meeting, 1-4 Sep 1998, Perpignan, France,
1998. (with John McManus) Environmental limits to coral reef development: where do we draw the line? Invited speaker, SICB annual meeting, Boston.
1997. Coral reefs and climate since the last glacial maximum. INSTAAR, Univ. Colorado.
1997. The response and role of coral reefs in climate change. University of Kansas, Lawrence KS.
1997. Modeling coral reef distribution and calcification on the globe. Invited plenary speaker, Land Ocean Interactions in the Coastal Zone, Open Science Meeting, The Netherlands.
1997. The effects of ENSO on coral reefs. Invited speaker, A Colloquium on El Nino-Southern Oscillation (ENSO): Atmospheric, Oceanic, Societal, Environmental, and Policy Perspectives, Boulder, Colorado, USA.
1996. The contribution of reef calcification to the global CaCO3 budget. 8th Int. Coral Reef Symp., Panama City.
1995 and 1996. Climate change and coral reefs. Designated speaker, the JASON Project, Denver Mus. Nat. Hist.
1994. A diagnostic model for predicting global coral reef distribution. PACON `94: Recent Advances in Marine Science and Technology, Townsville, Australia.