Field Survey of Thermal Environment, CO<sub>2</sub> Concentration, and UV Index in the Kamakura Snow-Rooms

WATANABE Shinichi, ISHII Tomoya, ISHII Jin, IWAI Masayuki

doi:10.24538/jhesj.30.1_21

<p>This study seeks to clarify the thermal environment, CO₂ concentration, and UV Index in the Kamakura snow-rooms, located in snowy area. Measurements were performed on February 12, 2019, in Takayama, Gifu Prefecture. Air temperature, relative humidity, air velocity, long- and short-wavelength radiation fluxes, as well as CO₂ concentration and UV Index were measured both outdoors and inside the Kamakura snow-rooms. During the daytime (9:30–16:00), the average air temperatures outdoors, in Kamakura-1 (one entrance/exit), and Kamakura-2 (two entrances/exits) were 2.2°C, 0.4℃, and −1.1℃, respectively. The average values for the calculated Universal Thermal Climate Index UTCI were 20.4℃ outdoors, 2.2℃ in Kamakura-1, and 1.8℃ in Kamakura-2, with the average outdoor UTCI being approximately 18℃ higher than that inside the snow-rooms. This may be due to the fact that the MRT was high because the weather that day was clear, meaning the solar radiation was strong, with a maximum value over 1,000 W/m². CO₂ concentrations in the snow-rooms increased due to the burning of charcoal and human exhalations. The maximum value of the UV Index outdoors was 4.61, which was evaluated as moderate intensity. Meanwhile, the UV intensities in the snow-rooms were weak, with a maximum UV Index of 0.05.</p>

Field Survey of Thermal Environment, CO<sub>2</sub> Concentration, and UV Index in the Kamakura Snow-Rooms

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