Can Indications of Climate Change Impacts Be Detected from Recent Phenomena in Japanese Coasts?

The IPCC 4th assessment report (2007) reveals the global warming caused by human actions. The current situation will change gradually; however, it will accelerate gradually to a situation never experienced before. This implies a collapse of the preconditions for disaster prevention work. Our final aim is to establish an adaptation methodology for the coastal prevention policy in Japan. The purpose of this study is to determine climate change signs and effects. First, wind changes between the future climate and present climate are analyzed by earth simulator results. Second, the wave climate historical change is re-analyzed for the data of five observation stations around the Japanese coast. We suggest the growth of wave climate in recent years and prove its relation with climate change by a comparison between the present and future wind outlines using the earth simulator.