Nyenzi B, Lefale PF.  2006.  El Niño Southern Oscillation (ENSO) and Global Warming. Advances in Geosciences. 6:95-101.

Andreae MO, Jones CD, Cox PM.  2005.  Strong present-day aerosol cooling implies a hot future. Nature. 435:1187-1190.

Overpeck JT, Sturm M, Francis JA, Perovich DK, Serreze MC, Benner R, Carmack EC, Chapin III FS, Gerlach SC, Hamilton LC et al..  2005.  Arctic System on Trajectory to New, Seasonally Ice-Free State. EOS. 86:309-316.

Andreae MO, Rosenfeld D, Artaxo P, Costa AA, Frank GP, Longo KM, Silva-Dias MAF.  2004.  Smoking Rain Clouds over the Amazon. Science. 303:1337-1342.

Bartolino J, Cunningham W.  2003.  Ground Water Depletion across the Nation. USGS Fact Sheet.

Bowers Janice E.  2007.  Has Climatic Warming Altered Spring Flowering Date of Sonoran Desert Shrubs? The Southwest Naturalist. 52:347-355.

Christensen N, Lettenmaier DP.  2006.  A multimodel ensemble approach to assessment of climate change impacts on the hydrology and water resources of the Colorado River basin. Hydrology and Earth System Sciences Discussions. 3:3727-3770.

Garfin G.  2006.  North American Drought Monitor Workshop. National Meteorological Service of Mexico.

Hayes M, Svoboda M, Le Comte D, Redmond K, Pasteris P.  2005.  Drought monitoring: New tools for the 21st century. D.A. Wihite (ed.) Drought and Water Crises: Science, Technology, and Management Issues. :53-69.

Getches D.  2003.  Impacts in Mexico of Colorado River Management in the United States. Climate and Water. :162-191.