The late Stephen Schneider was the Professor of Interdisciplinary Environmental Studies at Stanford University. An internationally recognised leader in research on climate change, he served as a consultant on the issue to every U.S. President from Nixon to Obama. He was actively involved with the Intergovernmental Panel On Climate Change since its inception, and was among the group of scientists to receive the Nobel Prize for their work with the organisation. His commitment to improving public understanding of science through extensive public appearances continued right up until his death in July this year, even once having a regular spot on the Tonight Showwith Johnny Carson. As he notes humourously in his book Science as a Contact Sport, he made 'the ultimate mistake' of going off-script during an interview with Johnny and was subsequently not invited back on to that program.
Doctor Penny Whetton will answer your climate science questions on the live chat after the program. She is a climate scientist with 20 years experience and is based at the CSIRO. She was a lead author on the third and fourth Assessment Reports for the Intergovernmental Panel on Climate Change (IPCC) and is now working on the fifth.