[Spatial-temporal dynamics of rainstorm in East China based on spatial-temporal data mining technology].

Based on TRMM 3B42 precipitation data, 5 time series at annual scale were constructed. Then the spatial and temporal dynamics of rainstorm in East China region from 2003 to 2015 were evaluated in the support of data mining and GIS spatial analysis technology. The results showed that, the spatial distributions of annual precipitation and annual rainstorm precipitation were similar during 2003-2015. Annual precipitation exhibited a slight increase trend while annual rainstorm ratio showed significant fluctuation. The imbalanced distribution of rainstorm in latitudinal direction was more obvious than that of longitudinal direction. Annual rainstorm frequency changed smoothly with significant spatial difference. Rainstorm showed a tendency of moving to north in the past 13 years. The changing trends of the five variables showed significant spatial differences, and most pixels showed non-significant increasing (or decreasing) trends.