A closer look at United States and global surface temperature changeJames E. Hansen, Thomas R. Karl, Walter Lawrence et al.|Journal of Geophysical Research Atmospheres|2001Cited by 587
Amplification of Surface Temperature Trends and Variability in the Tropical AtmosphereBenjamin D. Santer, Gavin A. Schmidt, T. M. L. Wigley et al.|Science|2005Cited by 339