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A Study of the Urban Tree Canopy Mean Radiant Temperature Mitigation Estimation

도시림의 여름철 평균복사온도 저감 추정 연구

  • Received : 2015.08.27
  • Accepted : 2016.02.23
  • Published : 2016.02.29

Abstract

This study aimed to estimate and evaluate the thermal mitigation of the urban tree canopy on the summer outdoor environment by quantitative use of mean radiant temperature. This study applied the SOLWEIG model based $T_{mrt}$ comparison method by using both (1) urban tree canopy presence examples and (2) urban tree canopy absence examples as constructed from airborne LiDAR system based three-dimensional point cloud data. As a result, it was found that an urban tree canopy can provide a decrease in the entire domain averaged daily mean $T_{mrt}$ about $5^{\circ}C$ and that the difference can increase up to $33^{\circ}C$ depending both on sun position and site conditions. These results will enhance urban microclimate studies such as indices (e.g., wind speed, humidity, air temperature) and biometeorology (e.g., perceived temperature) and will be used to support forest based public green policy development.

Keywords

Urban Tree Canopy;Thermal Comfort;Sky View Factor;Three-dimensional Point Cloud;Fish-eye Photography;SOLWEIG Model

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Cited by

  1. Surface Micro-Climate Analysis Based on Urban Morphological Characteristics: Temperature Deviation Estimation and Evaluation vol.26, pp.3, 2016, https://doi.org/10.14191/Atmos.2016.26.3.445
  2. The Effect on the Forest Temperature by Reduced Biomass Caused by Natural Forest Thinning vol.32, pp.3, 2018, https://doi.org/10.13047/KJEE.2018.32.3.303

Acknowledgement

Supported by : 산림청