Most studies, however, suggest that global precipitation has been on the rise, at least during the past century. On the other side of North America, Cronin et al . These discoveries indicate that the frequency and intensity of precipitation events tend to vary naturally on decadal, multidecadal and centennial time scales, independent of any change in atmospheric CO 2 . The climate model scenarios of CO 2 -induced global warming, however, do not. References Brutsaert, W. and Parlange, M.B. 1998.
Hydrologic cycle explains the evaporation paradox.
Cronin, T., Willard, D., Karlsen, A., Ishman, S., Verardo, S., McGeehin, J., Kerhin, R., Holmes, C., Colman, S. and Zimmerman, A. 2000. Climatic variability in the eastern United States over the past millennium from Chesapeake Bay sediments. Curtis, J., Wendler, G., Stone, R. and Dutton, E. 1998. Precipitation decrease in the western Arctic, with special emphasis on Barrow and Barter Island, Alaska. Haston, L. and Michaelsen, J. 1997.