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dc.contributor.author
Dissegna, Maria A.
dc.contributor.author
Yin, Tiangang
dc.contributor.author
Wei, Shanshan
dc.contributor.author
Richards, Dan
dc.contributor.author
Grêt-Regamey, Adrienne
dc.date.accessioned
2020-04-20T08:49:32Z
dc.date.available
2020-04-20T08:49:32Z
dc.date.issued
2019-08-19
dc.identifier.other
10.3390/f10080700
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/410729
dc.identifier.doi
10.3929/ethz-b-000359538
dc.description.abstract
Increased urbanization and climate change have resulted in the intensification of the urban heat island (UHI) effect, particularly in tropical cities. One of the main causes of UHI is the man-made urban surfaces influencing the radiation budget by absorbing, reflecting, and emitting radiation at various wavelengths. The radiative budget of a city is directly influenced by the urban geometry, surface materials, direct solar radiation and incident angle, and atmospheric diffuse radiation. Vegetation cover, in contrast, can decrease UHI by intercepting radiation and through the process of photosynthesis. Better understanding the effect of urban vegetation on the radiative budget can thus contribute towards the mitigation of the UHI effect and ultimately the development of climate resilient urban spaces. To analyze the contribution of vegetation to the radiative budget of a city, a detailed simulation of the complex interaction between the built environment and the vegetation is required. This study proposes an approach for analyzing the 3-D structure of both vegetation and built environment to quantify the contribution of vegetation to the radiative budget of an urban landscape. In a first step, a detailed 3-D model of Singapore including buildings and vegetation was reconstructed using a combination of free and commercial Earth Observation data. Then, the 3-D Discrete Anisotropic Radiative Transfer (DART) model was repurposed to estimate the radiation absorbed by the urban surfaces accounting for the presence of vegetation cover with changing Leaf Area Density (LAD) conditions. The presence of trees in the scene accounted for a significant reduction of the absorbed radiation by buildings and ground. For example, in the case of a residential low-building neighborhood, although having low tree cover, the reduction of the absorbed radiation by buildings and ground was up to 15.5% for a LAD =1. The field validation shows good agreement (R2 = 0.9633, RMSE = 10.8830 and Bias = −1.3826) between the DART-simulated shortwave exitance and upwelling shortwave measurements obtained from a net radiometer mounted on a local flux tower in the urban area of Singapore, over the studied period. Our approach can be used for neighborhood-scale analysis, at any desired location of a city, to allow test scenarios with varying surface materials and vegetation properties.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
MDPI
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
urban vegetation
en_US
dc.subject
leaf area density
en_US
dc.subject
radiative transfer modeling
en_US
dc.subject
3-D urban model reconstruction
en_US
dc.title
3-D reconstruction of an urban landscape to assess the influence of vegetation in the radiative budget
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Forests
ethz.journal.volume
10
en_US
ethz.journal.issue
8
en_US
ethz.pages.start
700
en_US
ethz.size
19 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Basel
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02656 - Inst. f. Raum- und Landschaftsentw. / Inst Spatial and Landscape Development::03823 - Grêt-Regamey, Adrienne / Grêt-Regamey, Adrienne
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02100 - Dep. Architektur / Dep. of Architecture::02655 - Netzwerk Stadt und Landschaft D-ARCH
*
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00003 - Schulleitung und Dienste::00022 - Bereich VP Forschung / Domain VP Research::08058 - Singapore-ETH Centre (SEC) / Singapore-ETH Centre (SEC)
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02656 - Inst. f. Raum- und Landschaftsentw. / Inst Spatial and Landscape Development::03823 - Grêt-Regamey, Adrienne / Grêt-Regamey, Adrienne
en_US
ethz.date.deposited
2019-07-31T09:17:51Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-04-20T08:49:44Z
ethz.rosetta.lastUpdated
2021-02-15T10:23:17Z
ethz.rosetta.versionExported
true
dc.identifier.olduri
http://hdl.handle.net/20.500.11850/359538
dc.identifier.olduri
http://hdl.handle.net/20.500.11850/355961
ethz.COinS
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