Airborne and Terrestrial Observations of the Thermal Environment of Urban Areas Surrounding a High-Rise Building during the Japanese Winter

Sensors

Kan Chen¹  Takashi Asawa¹  Haruki Oshio¹ 

[1] School of Environment and Society, Tokyo Institute of Technology, 4259-G5-2, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8502, Japan;

关键词: urban thermal environment;    air temperature;    high-rise building;    mobile observation;    thermal remote sensing;   

DOI  :  10.3390/s20020517

来源: DOAJ

【 摘 要 】

We investigated the distribution of air temperature (T_a) and the factors affecting it in low-rise areas surrounding an isolated high-rise building during the Japanese winter. The study site was the central part of a regional city in Japan (36°5′ N, 140°12′ E), lying north-east of the Tokyo metropolitan area. The daytime surface temperature (T_s) in the shade is generally considered to be comparable to T_a; however, according to airborne remote sensing conducted in December 2009 where a multi-spectral scanner was installed on a fixed-wing aircraft, T_s for pavements in the shade of a high-rise building was significantly lower than T_a of sub-urban areas, indicating an influence of cold storage on T_s. Then, we conducted mobile observations using instruments (thermocouple, four component radiometer, and so on) installed on a bicycle in January 2016 to investigate the detailed distribution of T_a and the factors affecting it. The results showed the T_a over the pavements in the shade of the high-rise building was lower than the T_a of sunlit areas in the same urban area by −2 °C and lower than the T_a of sub-urban areas by −1−1.5 °C, although the advection effect was large due to strong winds around the building. In conclusion, a locally lower T_a compared to the surrounding areas can develop during the day in winter, even in spaces that are open to areas beyond the canopy.

【 授权许可】

Unknown