precipitation extremes

Contemporary changes of the hydrological cycle over the contiguous United States: Trends derived from in situ observations

Groisman PY, Knight RW, Karl TR, Easterling DR, Sun BM, Lawrimore JH. 2004. Contemporary changes of the hydrological cycle over the contiguous United States: Trends derived from in situ observations. Journal of Hydrometeorology. 5:64-85.