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Bart Nijssen, Shraddhanand Shukla, Chiyu Lin, Huilin Gao, Tian Zhou, Ishottama, Justin Sheffield, Eric F. Wood, and Dennis P. Lettenmaier

force UW-SWM. In addition, we evaluated changes in model forcings and soil moisture dynamics during the spinup and real-time periods, which highlight challenges in the operation of a global, real-time system. The 0.5° land mask is based on Jet Propulsion Laboratory (2013) , with grid cells designated as land if more than half their area is land. In addition, following Sheffield et al. (2012) , all desert regions with a mean annual precipitation of less than 0.5 mm day −1 (during the

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Xing Yuan, Eric F. Wood, Nathaniel W. Chaney, Justin Sheffield, Jonghun Kam, Miaoling Liang, and Kaiyu Guan

limited large-scale SST–precipitation relationship over Africa at seasonal scales, we may expect other regional atmospheric signals can contribute to the residual portions of the precipitation variance, such as the anomalies in African easterly jet and Saharan northerly wind ( Camberlin et al. 2001 ). Another possible area is the investigation of the predictability derived from the initial land surface anomaly using land surface hydrologic models ( Li et al. 2009 ; Shukla and Lettenmaier 2011

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