Walking-based mobile measurement: Examining its reliability for spatial thermal characteristics in urban environments

초록

This study evaluates the reliability of the "Go-and-Stop" mobile method for collecting spatial thermal data in urban environments. Field measurements were conducted using six fixed weather stations installed in diverse spatial contexts and a mobile station following a route on a university campus in South Korea. While the mobile station accurately measured air temperature (T-a), wind speed (V-a) exhibited variability, with errors between 25 % and 36 %, indicating a need for improved techniques. Globe temperature (GT) and mean radiant temperature (MRT) showed lower accuracy under lower sky view factor (SVF) (< 0.2) compared to areas with higher SVF (> 0.5). Statistical analysis confirmed that spatial factors like SVF affect accuracy, with a tendency to underestimate cooling effects in shaded areas using mobile measurements. In shaded and windy areas under building piloti, GT and MRT predictions were insignificant, requiring supplementary fixed measurements. The results highlight that in high SVF areas, GT and MRT accuracy aligns with T-a, while further research is needed in low SVF conditions. This study confirms the effectiveness of the Go-and-Stop method, taking into account spatial characteristics (e.g., SVF), while also identifying its limitations.

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