Abstract:

Study indicates the global warming will lead to more extreme events.Dynamics of precipitation patterns are major causes for hydrological disaster. With the aid of EOF method,the precipitation patterns were extracted in the Yangtze River Basin using satellitederived TRMM/PR monthly accumulated data.Research findings indicate that signals of largescale precipitation variations can be well identified,and the oscillations in relation to the major PCs are well consistent with the typical hydrological extremes.The EOF analyses constitute a fundamental tool to help explore the inherent patterns existed in spatial databases (satellite image sequences) that explain the primary variability through the decomposition of a spacetime field.The retrieved patterns are valuable avenues to help project extreme events,forecast runoff extremes and aid in disaster mitigation in environmental decisionmaking