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Predicting drought on seasonal-to-decadal time scales, Schubert, S.; Koster, R.; Hoerling, M.; Seager, R.; Lettenmaier, D.; Kumar, A.; Gutzler, D. , Bulletin of the American Meteorological Society, Oct, Volume 88, Issue 10, p.1625-1630, (2007), Doi 10.1175/Bams-88-10-1625

Differing trends in the tropical surface temperatures and precipitation over land and oceans, Kumar, A.; Yang, F. L.; Goddard, L.; Schubert, S. , Journal of Climate, Feb, Volume 17, Issue 3, p.653-664, (2004) Abstract

Progress in Pan American CLIVAR Research: The North American Monsoon System, Higgins, R. W.; Douglas, A.; Hahmann, A.; Berbery, E. H.; Gutzler, D.; Shuttleworth, J.; Stensrud, D.; Amador, J.; Carbone, R.; Cortez, M.; Douglas, M.; Lobato, R.; Meitin, J.; Ropelewski, C.; Schemm, J.; Schubert, S.; Zhang, C. D. , Atmosfera, Jan 1, Volume 16, Issue 1, p.29-65, (2003) Abstract