Acknowledgments This work has been supported by the Swedish University strategic environmental research program Ekoklim and the Swedish Research Council Formas (project 2012-790). The soil moisture data were downloaded from the Ameriflux website: funding for AmeriFlux data resources was provided by the U.S. Department of Energy's Office of Science. GPCC Precipitation data, GHCN Gridded V2 data, NARR data, and CPC US Unified Precipitation data were obtained from the Web site of NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, at http://www.esrl.noaa.gov/psd/.Peer reviewedPublisher PD
