no42-44

[44] Diurnal Change of Summer Temperature Distribution in Urban Area Based on SSP/RCP Images under Climate Change

- Using an Analysis Model Compared with Actual Measurement Results

○Junya Yamasaki¹, Yasutaka Wakazuki², Satoru Iizuka³, Takahiro Yoshida⁴, Ryoichi Nitanai¹, Rikutaro Manabe¹, Akito Murayama¹ (1. The University of Tokyo, 2. Ibaraki University, 3. Nagoya University, 4. The University of Tokyo )

Keywords:Climate Change Adaptation, Future Scenario, CFD, 3D City Model, Actual Measurement

The impact of temperature rise due to climate change is becoming evident in Japan, and outdoor heat risks are increasing especially in urban areas. This study simulated diurnal changes of summer temperature distribution for SSP/RCP future images in the 2090s where climate change will have progressed, focusing on the urban center neighborhood in Nagoya City. The novelty of this study is three-fold: Using a CFD model based on comparison with actual measurement results in 2021; Visualizing thermal changes during daytime in summer based on transient analysis; Preparing three future scenarios of SSP1-1.9, SSP2-4.5, and SSP5-8.5. One of the findings was that SSP5-8.5 may bring a positive outcome for thermal environment as increasing building height generates expanding shaded area.