David Schneider is a project scientist at the National Center for Atmospheric Research in the USA.  His research focuses on understanding the patterns and mechanisms of internal climate variability and forced climate change in Antarctica and the Southern Ocean.  Using a variety of observational data sets and climate models, his recent projects have focused on atmospheric linkages between the tropics and Antarctica, uncertainty in climate model projections arising from model biases, and the causes of atmospheric circulation change over the past century.  In addition to his scientific research, David leads the development of the Climate Data Guide, a website featuring unique, expert-written assessments of the strengths and limitations of a variety of climate data sets.  David earned his Ph.D. in Earth Sciences from the University of Washington in Seattle, his M.S. from the University of Pennsylvania, and his B.A. from Carleton College in Minnesota.