Ocean pH, atmospheric CO2, and habitability of the early Earth

David C Catling, University of Washington, Earth and Space Sciences, Seattle, WA, United States, Shintaro Kadoya, University of Washington Seattle Campus, Earth and Space Sciences, Seattle, WA, United States, Joshua Krissansen-Totton, University of Washington Seattle Campus, Seattle, WA, United States and Ping-Chun Lin, University of Washington Seattle Campus, Seattle, United States