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John (Jack) Williams

John (Jack) Williams

Expert on global warming and ecological responses to climate change, past and future

Professor, geography; director, Center for Climatic Research College of Letters and Science Work: 608-265-5537 — Home and cell phones available upon request Home page


  • Ecological impacts of global climate change
  • Paleoecology
  • Paleoclimatology
  • Earth system science
  • Conservation biology


  • Bryson Distinguished Professor of the Climate, People and the Environment Program
  • Philip R. Certain College of Letters & Science Dean's Distinguished Faculty Award, 2008
  • Cooper Award for outstanding contribution to the fields of geobotany, physiographic ecology or plant succession
  • Aldo Leopold Leadership Fellow, 2011