摘要：High road-surface temperature due to heat waves can lead to dangerous driving conditions such as
tire blowouts and deformation induced by thermal stress on the roads. In this study, a Mobile
Observation Vehicle dataset, with high spatial and temporal resolutions for the heat-wave episode
that occurred on 16–17 August 2018, is used to understand environmental characteristics on urban
road-surface and air temperatures in Seoul. This study demonstrates that the magnitude of urban
road-surface temperature is dependent on the differences in incoming solar radiation due to
screening of high-rise buildings in the Gangnam area, and is associated with the topographical
features in the Gangbuk area. The road-surface temperature in the section of darker-colored
asphalts was higher than that of lighter-colored asphalts, with a mean difference of 6.8°C, and
both surface and air temperatures on the iron plate were highest, with means of 51.7°C and 35.1°C,
respectively. In addition, during the water-sprinkling period, road-surface temperature was cooled
by about 8.7°C (19%) compared with that in the period without water-sprinkling, but there was no
significant change in air temperature. The current results could be practically used to improve roadsurface
temperature prediction models for civil engineers or road managers.
关键词：Heat wave ; road-surface temperature ; mobile observation vehicle ; Seoul
