Climatological changes in rain and non-rain days over the East Asian region using long term rain gauge observation data

Recently, the global warming attracts a big attention. One of the great concerns is the change in the global rain distribution and extreme events of rainfall. In order to identify the changes in rainfall characteristics, we investigated the annual change in the top five days at maximal daily rainfall amount and those for the continuous non-rain periods using Asian Precipitation-Highly Resolved Observational Data Integration Towards Evaluation of the Water Resources (APHRODITE's Water Resources) which stores long term (1978-2002) gridded rain gauge observation data around East Asian regions. The maximum daily rainfall amount and non-rain days tend to increase although their inter-annual variation is large. The annual variation in the maximal daily rainfall amounts corresponds to those in non-rain days in Thailand. We also show the relationship between these results and atmospheric fields using reanalysis data.