Freshwater Ecosystems and Climate Change in North America brings together a group of experts from the fields of geochemistry, climatology, hydrology and aquatic ecology to address the central question, What would be the impact to and response of freshwater ecosystems in your region as a result of a hypothetical doubling of CO2 in the atmosphere? These regional papers and syntheses will provide a solid foundation upon which scientists can proceed and build in their efforts to provide other scientists, regulators, and decision-makers with meaningful information concerning the important phenomena associated with climate change.