A History of Drought in the Southern United States Since 1895
Chen, G., Tian, H., Zhang, C., Liu, M., Ren, W., Zhu, W., Chappelka, A.H., Prior, S.A. and Lockaby, G.B. 2012. Drought in the Southern United States over the 20th century: variability and its impacts on terrestrial ecosystem productivity and carbon storage. Climatic Change 114: 379-397.
According to the nine researchers, there were "no obvious increases in drought duration and intensity during 1895-2007." In fact, they say they actually found "a slight (not significant) decreasing trend in drought intensity." And they emphatically state that "although reports from IPCC (2007) and the U.S. Climate Report (Karl et al., 2009) indicated that it is likely that drought intensity, frequency, and duration will increase in the future for the SUS, we did not find this trend in the historical data." And in like manner they write that although "the IPCC (2007) and U.S. Climate Report predicted a rapid increase in air temperature, which would result in a higher evapotranspiration thereby reducing available water," they also say they "found no obvious increase in air temperature for the entire SUS during 1895-2007."
Once again, the over-the-top contentions of both the IPCC and the authors of the U.S. Climate Report of 2009 are found to be without any confirmation whatsoever in pertinent real-world data.
IPCC. 2007. Climate Change 2007: The Physical Science Basis. Solomon, S., Qin, D., Manniing, M., Chen, Z., Marquis, M., Averyt, K.B., Tignor, M. and Miller, H.L. (Eds.), Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge, United Kingdom.
Karl, T.R., Melillo, J.M. and Peterson, T.C. 2009. Global Climate Change Impacts in the United States. Cambridge University Press, Cambridge, United Kingdom.