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KMID : 1024520150240101265
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Journal of the Environmental Sciences
2015 Volume.24 No. 10 p.1265 ~ p.1272
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Observational Study for the Thermal Environment Evaluation of Summertime over the Asphalt Pavement - Case Study in Daegu 2014 -
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Kim Hae-Dong
Kim Sung-Rak
Kim Baek-Jo
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Abstract
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To investigate the thermal environment over the summertime asphalt pavements, an automatic weather observation system was installed at a parking lot paved with asphalt to observe various meteorological parameters and surface temperature from July 1 to September 30, 2014. Since the number of rainy days in summer of 2014 particularly after the mid July is more than that of average data, a ratio of daily peak surface temperature above 45 ℃ was 28% which was lower than the average. The observational data about hourly average surface temperature and various heat balance factors at days where daily peak surface temperature is above 45 ℃ are as follows: An hour that had the daily maximum temperature was around 15 pm and the value was 49℃ approximately. Net shortwave radiation was the highest at 12pm as 800 W/m2and much radiation of 500 W/m2 was absorbed at the ground between 11am and 17pm. Sensible heat that was delivered from the ground to the atmosphere was evaluated as 200 W/m2 between 10am and 19pm. underground transfer heat up to 100 W/m2 was measured as negative from 19pm to the next day 8am, which indicated the lower atmosphere was heated at night.
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KEYWORD
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Net shortwave radiation, Sensible heat, Soil Transfer heat
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