In today’s program we continue our investigation into Earth’s ever changing climate from a marine geology and oceanographic perspective examining various factors both past and present that have contributed to major climate shifts.  Today we welcome Dr. Colin Summerhayes to the program.  Dr. Summerhayes is an Emeritus Associate of the Scott Polar Research Institute of Cambridge University. He has carried out research on aspects of past climate change in both academia and industry: at the New Zealand Oceanographic Institute; Imperial College London; the University of Cape Town; the Woods Hole Oceanographic Institution; the UK's Institute of Oceanographic Sciences Deacon Laboratory (IOSDL); the UK's Southampton (now National) Oceanography Centre; the Exxon Production Research Company; and the BP Research Company. He has managed research programmes on climate change for the UK's Natural Environment Research Council, the Intergovernmental Oceanographic Commission (IOC) of UNESCO, and the Scientific Committee on Antarctic Research (SCAR) of the International Council for Science. He is a former director of both the IOSDL and SCAR, and of the IOC's Global Ocean Observing System Project.  Dr. Summerhayes is also the author of various books on this subject matter and numerous scientific papers.  
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