Thanks to Melissa Nance for help with some of the illustrations. All figures were produced using Generic Mapping Tools (Wessel and Smith 1995).
Barlow, M., , S. Nigam, , and E. H. Berbery, 2001: ENSO, Pacific decadal variability, and U.S. summertime precipitation, drought, and streamflow. J. Climate, 14 , 2105–2128.
Charney, J. G., , W. J. Quirk, , S. Chow, , and J. Kornfield, 1977: A comparative study of the effects of albedo change on drought in semi-arid regions. J. Atmos. Sci., 34 , 1366–1385.
Gershunov, A., , and T. P. Barnett, 1998: Interdecadal modulation of ENSO teleconnections. Bull. Amer. Meteor. Soc., 79 , 2715–2725.
Gershunov, A., , T. Barnett, , and D. Cayan, 1999: North Pacific interdecadal oscillation seen as factor in ENSO-related North American climate anomalies. Eos, Trans. Amer. Geophys. Union, 80 , 25.
Gregory, J. M., , J. F. B. Mitchell, , and A. J. Brady, 1997: Summer drought in northern midlatitudes in a time-dependent CO2 climate experiment. J. Climate, 10 , 662–686.
Groisman, P. Y., , and D. R. Easterling, 1994: Variability and trends of total precipitation and snowfall over the United States and Canada. J. Climate, 7 , 184–205.
Groisman, P. Y., , and D. R. Legates, 1994: The accuracy of United States precipitation data. Bull. Amer. Meteor. Soc., 75 , 215–227.
Groisman, P. Y., , R. W. Knight, , and T. R. Karl, 2001: Heavy precipitation and high streamflow in the contiguous United States: Trends in the twentieth century. Bull. Amer. Meteor. Soc., 82 , 219–246.
Guttman, N. B., , and R. G. Quayle, 1996: A historical perspective of U.S. climate divisions. Bull. Amer. Meteor. Soc., 77 , 293–303.
Halpert, M. S., , and C. F. Ropelewski, 1992: Surface temperature patterns associated with the Southern Oscillation. J. Climate, 5 , 577–593.
Hu, Q., , C. M. Woodruff, , and S. E. Mudrick, 1998: Interdecadal variations of annual precipitation in the central United States. Bull. Amer. Meteor. Soc., 79 , 221–229.
Hurrell, J. W., 1995: Decadal trends in the North Atlantic Oscillation and relationships to regional temperature and precipitation. Science, 269 , 676–679.
Jones, P. D., cited. 2001: Gridded hemispheric and global temperature averages. [Available online at http://www.cru.uea.ac.uk/cru/data/temperature.].
Kaplan, A., , M. Cane, , Y. Kushnir, , A. Clement, , M. Blumenthal, , and B. Rajagopalan, 1998: Analyses of global sea surface temperature 1856–1991. J. Geophys. Res, 103 , 18567–18589.
Karl, T. R., , and P. D. Jones, 1989: Urban bias in area-averaged surface temperature trends. Bull. Amer. Meteor. Soc., 70 , 265–270.
Karl, T. R., , and R. W. Knight, 1998: Secular trends of precipitation amount, frequency, and intensity in the USA. Bull. Amer. Meteor. Soc., 79 , 231–241.
Karl, T. R., , L. Metcalf, , M. L. Nicodemus, , and R. Quayle, 1983: Statewide average climatic history. Historical Climatology Series 6-1, National Climate Data Center, 35 pp.
Karl, T. R., , C. N. Williams Jr., , P. J. Young, , and W. Wendland, 1986: A model to estimate the time of observation bias associated with monthly mean maximum, minimum and mean temperatures for the United States. J. Climate Appl. Meteor., 25 , 145–160.
Karl, T. R., and Coauthors. 1993: A new perspective on recent global warming: Asymmetric trends in daily maximum and minimum temperature. Bull. Amer. Meteor. Soc., 74 , 1007–1023.
Karl, T. R., , R. W. Knight, , and N. Plummer, 1995: Trends in high frequency climate variability during the 20th century. Nature, 377 , 217–220.
Karl, T. R., , R. W. Knight, , D. R. Easterling, , and R. G. Quayle, 1996: Indices of climate change for the United States. Bull. Amer. Meteor. Soc., 77 , 279–292.
Kiladis, G. N., , and H. F. Diaz, 1989: Global climatic anomalies associated with extremes in the Southern Oscillation. J. Climate, 2 , 1069–1090.
Kunkel, K. E., , K. Andsager, , and D. R. Easterling, 1999: Long-term trends in extreme precipitation events over the conterminous United States and Canada. J. Climate, 12 , 2515–2527.
Langbein, W. B., , and J. R. Slack, 1982: Yearly variations in runoff and frequency of dry years for the conterminous United States. U.S. Geological Survey Open File Rep. 82-751, 85 pp.
Lau, K. M., , and H. Weng, 1995: Climate signal detection using wavelet transform: How to make a time series sing. Bull. Amer. Meteor. Soc., 76 , 2391–2402.
Legates, D. R., 1995: Precipitation measurement biases and climate change detection. Preprints, Sixth Symp. on Global Change Studies, Dallas, TX, Amer. Meteor. Soc., 168–173.
Lettenmaier, D. P., , E. F. Wood, , and J. R. Wallis, 1994: Hydro-climatological trends in the continental United States, 1948–88. J. Climate, 7 , 586–607.
Livezey, R. E., , M. Masutani, , A. Leetma, , H. Rui, , M. Ji, , and A. Kumar, 1997: Teleconnective response of the Pacific–North American region to large central equatorial Pacific SST anomalies. J. Climate, 10 , 1787–1820.
Manabe, S., , and R. T. Wetherald, 1987: Large-scale changes of soil wetness induced by an increase in atmospheric carbon dioxide. J. Atmos. Sci., 44 , 1211–1235.
Mann, H. B., , and D. R. Whitney, 1947: On a test of whether one of two random variables is stochastically larger than the other. Ann. Math. Stat., 18 , 50–60.
Mantua, N. J., , S. R. Hare, , Y. Zhang, , J. M. Wallace, , and R. C. Francis, 1997: A Pacific interdecadal climate oscillation with impacts on salmon production. Bull. Amer. Meteor. Soc., 78 , 1069–1079.
Mauget, S. A., , and D. R. Upchurch, 1999: El Niño and La Niña related climate and agricultural impacts over the Great Plains and Midwest. J. Prod. Agric., 12 , 203–214.
Mendenhall, W., , D. D. Wackerly, , and R. L. Sheaffer, 1990: Mathematical Statistics with Applications. 4th ed. PWS-Kent, 788 pp.
Mote, T., 1996: Influence of ENSO on maximum, minimum, and mean temperatures in the southeast United States. Phys. Geogr., 17 , 497–512.
Namias, J., 1966: Nature and possible causes of the northeastern United States drought during 1962–1965. Mon. Wea. Rev., 94 , 543–554.
Namias, J., 1982: Anatomy of Great Plains protracted heat waves (especially the 1980 U.S. summer drought). Mon. Wea. Rev., 110 , 824–838.
Namias, J., , X. Yuan, , and D. R. Cayan, 1988: Persistence of North Pacific sea surface temperature and atmospheric flow patterns. J. Climate, 1 , 682–703.
Oglesby, R. J., , and D. J. Erickson, 1989: Soil moisture and the persistence of North American drought. J. Climate, 2 , 1362–1380.
Parker, D. E., , P. D. Jones, , C. K. Folland, , and A. Bevan, 1994: Interdecadal changes of surface temperature since the late 19th century. J. Geophys. Res., 99 , 14373–14399.
Puckett, W. E., , J. H. Dane, , and B. F. Hajek, 1985: Physical and mineralogical data to determine soil hydraulic properties. Soil Sci. Soc. Amer. J., 49 , 831–836.
Quayle, R. G., , D. R. Easterling, , T. R. Karl, , and P. J. Hughes, 1991: Effects of recent thermometer changes in the cooperative station network. Bull. Amer. Meteor. Soc., 72 , 1718–1723.
Rind, D., 1982: The influence of ground moisture conditions in North America on summer climate as modeled in the GISS GCM. Mon. Wea. Rev., 110 , 1487–1493.
Rind, D., , R. Goldberg, , J. Hansen, , C. Rosenzweig, , and R. Ruedy, 1990: Potential evaporation and the likelihood of future drought. J. Geophys. Res., 95 , (D7),. 9983–10004.
Rogers, J., 1990: Patterns of low-frequency monthly sea level pressure variability (1899–1986) and associated wave cyclone frequencies. J. Climate, 3 , 1364–1379.
Ropelewski, C. F., , and M. S. Halpert, 1989: Precipitation patterns associated with the high index phase of the Southern Oscillation. J. Climate, 2 , 268–283.
Rosenzweig, C., , and D. Hillel, 1993: The Dust Bowl of the 1930's: Analog of greenhouse effect in the Great Plains? J. Environ. Qual., 22 , 9–22.
Schaal, L. A., , and R. F. Dale, 1977: Time of observation temperature bias and “climatic change.”. J. Appl. Meteor., 16 , 215–222.
Shabbar, A., , and M. Khandekar, 1996: The impact of El Niño–Southern Oscillation on the temperature field over Canada. Atmos.–Ocean, 34 , 401–416.
Stephenson, D. B., cited. 1999: The North Atlantic Oscillation thematic website. [Available online at http://www.met.rdg.ac.uk/cag/NAO/.].
Thiebaux, H. J., , and F. W. Zwiers, 1984: The interpretation and estimation of effective sample size. J. Climate Appl. Meteor., 23 , 800–811.
Trenberth, K. E., , and G. W. Branstator, 1992: Issues in establishing causes of the 1988 drought over North America. J. Climate, 5 , 159–172.
Trenberth, K. E., , G. W. Branstator, , and P. A. Arkin, 1988: Origins of the 1988 North American Drought. Science, 242 , 1640–1645.
Wessel, P., , and W. H. F. Smith, 1995: New version of the Generic Mapping Tools released. Eos, Trans. Amer. Geophys. Union, 76 , 329.
Wolfson, N., , R. Atlas, , and Y. C. Sud, 1987: Numerical experiments related to the summer 1980 heat wave. Mon. Wea. Rev., 115 , 1345–1357.
Woodhouse, C. A., , and J. T. Overpeck, 1998: 2000 years of drought variability over the central United States. Bull. Amer. Meteor. Soc., 79 , 1145–1162.