David Archer uses computer simulations to understand the balance between carbon dioxide levels in the oceans and in the atmosphere in the past to better predict the impact that changing levels will have on future climate. He is a contributor to Realclimate.org, where commentary written by working climate scientists can be accessed by journalists and the public. Archer also is the author of an undergraduate textbook for non-science majors, titled Global Warming: Understanding the Forecast. The book assesses both the natural and technological contributions to long-lived carbon dioxide in the atmosphere. He also is working on a book titled From Here to Eternity: Global Warming in Geologic Time.