P.H. Gleick, H. Cooley, J.S. Famiglietti, D.P. Lettenmaier, T. Oki, C.J. Vörösmarty, and E.F. Wood. Improving Understanding of the Global Hydrologic Cycle. In Climate Science for Serving Society: Research, Modeling and Prediction Priorities. G.R. Asrar and J.W. Hurrell, Eds. Spinger: Dordrecht, The Netherlands, 2013, 151-184.