Keywords:Climate change adaptation
This research project, the Environment Research and Technology Development Fund 2-1905 of the Environmental Restoration and Conservation Agency of Japan, evaluated risk in urban areas caused by near-future climate changes, such as heatstroke by hot spells, building collapse by gale wind, inundation by torrential rain, and traffic obstacles by heavy snow. We targeted Kumagaya and Niigata for hot spells, Osaka and Kyoto for gale wind, and Sapporo for heavy rainfall/snowfall. First, in order to clarify climate change impact in the near future in terms of hot spells, gale wind, and intense precipitation, we identified these hazards that potentially impacted the urban area and typical weather patterns that led to disaster in urban areas, by detecting the tendency of temperature, extremes, and synoptic patterns. The weather related to the disaster in urban areas included various agents with not only urban scales but synoptic scales. This project analysed meteorological phenomena, from urban to synoptic scales, related to hot spells, a gale wind, and intense precipitation. Next, we evaluated disaster risk peculiar to urban areas based on identified events. Here, if necessary, we effectively conducted atmospheric large-eddy simulation for urban areas or regional atmospheric model with a few kilometre horizontal resolution. Finally, we discussed the summary of the results obtained from the above study with a stakeholder of local governments. This contributed to the national environmental policy, by proposing possible adaptation directions based on meteorological hazards for Japanese cities, by evaluating risk effectively, and by developing climate change adaptation technique and its social implementation.