Urban Physical Environments and the Duration of High Air Temperature: Focusing on Solar Radiation Trapping Effects
Urban heat island effects, which are the phenomenon wherein higher ambient air temperatures are measured in cities than in rural areas, have worsened urban thermal environments over the past decades. This study aims to analyze the effects of urban physical environments on the duration of high air te...
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doaj-46674e6d4d64486ba11f0ebc5bf72a972020-11-24T21:09:01ZengMDPI AGSustainability2071-10502018-12-011012483710.3390/su10124837su10124837Urban Physical Environments and the Duration of High Air Temperature: Focusing on Solar Radiation Trapping EffectsYeri Choi0Sugie Lee1Hyunbin Moon2Department of Urban Planning and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, KoreaDepartment of Urban Planning and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, KoreaDepartment of Urban Planning and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, KoreaUrban heat island effects, which are the phenomenon wherein higher ambient air temperatures are measured in cities than in rural areas, have worsened urban thermal environments over the past decades. This study aims to analyze the effects of urban physical environments on the duration of high air temperature, using climate data collected from 217 Automatic Weather Stations in Seoul, Korea. In order to specify radiation trapping effects, interaction effects between sky view factors (SVF) and albedo values were analyzed using multiple regression analysis. The results indicate that increases in commercial and traffic areas lead to longer durations of high air temperature and that high urban porosity shortens the duration of high air temperature by improving urban ventilation. This study also indicates that the duration of high air temperature has a negative association with SVF; however, an analysis of interaction effects indicates that high-albedo materials diminish the positive effects of high SVF largely because of radiation trapping effects. These findings suggest that urban ventilation paths, high SVF, and materials with an appropriate albedo value play important roles in improving thermal comfort conditions, such as the duration of high air temperature.https://www.mdpi.com/2071-1050/10/12/4837air temperaturephysical environmentsolar radiation trapping effecturban geometryurban heat island effects |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yeri Choi Sugie Lee Hyunbin Moon |
spellingShingle |
Yeri Choi Sugie Lee Hyunbin Moon Urban Physical Environments and the Duration of High Air Temperature: Focusing on Solar Radiation Trapping Effects Sustainability air temperature physical environment solar radiation trapping effect urban geometry urban heat island effects |
author_facet |
Yeri Choi Sugie Lee Hyunbin Moon |
author_sort |
Yeri Choi |
title |
Urban Physical Environments and the Duration of High Air Temperature: Focusing on Solar Radiation Trapping Effects |
title_short |
Urban Physical Environments and the Duration of High Air Temperature: Focusing on Solar Radiation Trapping Effects |
title_full |
Urban Physical Environments and the Duration of High Air Temperature: Focusing on Solar Radiation Trapping Effects |
title_fullStr |
Urban Physical Environments and the Duration of High Air Temperature: Focusing on Solar Radiation Trapping Effects |
title_full_unstemmed |
Urban Physical Environments and the Duration of High Air Temperature: Focusing on Solar Radiation Trapping Effects |
title_sort |
urban physical environments and the duration of high air temperature: focusing on solar radiation trapping effects |
publisher |
MDPI AG |
series |
Sustainability |
issn |
2071-1050 |
publishDate |
2018-12-01 |
description |
Urban heat island effects, which are the phenomenon wherein higher ambient air temperatures are measured in cities than in rural areas, have worsened urban thermal environments over the past decades. This study aims to analyze the effects of urban physical environments on the duration of high air temperature, using climate data collected from 217 Automatic Weather Stations in Seoul, Korea. In order to specify radiation trapping effects, interaction effects between sky view factors (SVF) and albedo values were analyzed using multiple regression analysis. The results indicate that increases in commercial and traffic areas lead to longer durations of high air temperature and that high urban porosity shortens the duration of high air temperature by improving urban ventilation. This study also indicates that the duration of high air temperature has a negative association with SVF; however, an analysis of interaction effects indicates that high-albedo materials diminish the positive effects of high SVF largely because of radiation trapping effects. These findings suggest that urban ventilation paths, high SVF, and materials with an appropriate albedo value play important roles in improving thermal comfort conditions, such as the duration of high air temperature. |
topic |
air temperature physical environment solar radiation trapping effect urban geometry urban heat island effects |
url |
https://www.mdpi.com/2071-1050/10/12/4837 |
work_keys_str_mv |
AT yerichoi urbanphysicalenvironmentsandthedurationofhighairtemperaturefocusingonsolarradiationtrappingeffects AT sugielee urbanphysicalenvironmentsandthedurationofhighairtemperaturefocusingonsolarradiationtrappingeffects AT hyunbinmoon urbanphysicalenvironmentsandthedurationofhighairtemperaturefocusingonsolarradiationtrappingeffects |
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1716758905722241024 |