Wallace, John M., Qiang Fu, Brian Smoliak, Pu Lin, and Celeste M. Johanson. 2012. “Simulated Versus Observed Patterns of Warming over the Extratropical Northern Hemisphere Continents During the Cold Season”. Proceedings of the National Academy of Sciences of the United States of America 109 (36): 14337-42. Full text: Simulated versus observed patterns of warming over the extratropical Northern Hemisphere continents during the cold season.