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- Publisher Website: 10.1016/j.scitotenv.2020.137461
- Scopus: eid_2-s2.0-85080092632
- PMID: 32114235
- WOS: WOS:000521936300107
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Article: Right tree, right place (urban canyon): Tree species selection approach for optimum urban heat mitigation - development and evaluation
Title | Right tree, right place (urban canyon): Tree species selection approach for optimum urban heat mitigation - development and evaluation |
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Authors | |
Keywords | UHI thermal comfort Tree-plantingTree forms (species) Street-canyon Urban densities |
Issue Date | 2020 |
Publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/scitotenv |
Citation | Science of the Total Environment, 2020, v. 719, p. article no. 137461 How to Cite? |
Abstract | The re-integration of trees into the urban landscape is a veritable strategy for urban climate mitigation and adaptation. However, dysfunctional trees in terms of urban heat mitigation are dominant in many sub-tropical cities' landscapes due to the lack of scientific basis of tree selection. Therefore, this study proposes and evaluates a methodological framework as an approach for “right tree, right place” for urban heat mitigation through parametric ENVI-met simulations that involve the combination of 54 generic tree forms and 10 characteristic urban morphology – Sky-View Factor (SVF). Results show variable temperature regulation by tree forms (species) with varying magnitude in different urban morphology. Daytime and nighttime temperature regulation effects were between 0.3 °C – 1.0 °C and 0.0 °C – 2.0 °C, respectively depending on tree forms and SVF value. Furthermore, the Heat Reduction Potential (HRP) of trees forms were determined in terms of their human thermal comfort improvement. In general, we found a range of +5% and − 20% depending on SVF, negative and positive values imply heat reduction and increment, respectively. With the competing shading effect of buildings, the HRP of trees reduces from high to low SVF area with variable magnitude among tree forms (species). Hence, the proposed morphology-based tree selection approach was evaluated by comparison with two uninformed selection approaches in a realistic urban neighborhood in Hong Kong. Results clearly indicate the proposed approach's capability in improving human thermal comfort by up two times more than either of the other approaches. Finally, evidence-based recommendations were given for the reference of policy-makers when they make urban green development plan. |
Persistent Identifier | http://hdl.handle.net/10722/288430 |
ISSN | 2023 Impact Factor: 8.2 2023 SCImago Journal Rankings: 1.998 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Morakinyo, TE | - |
dc.contributor.author | Ouyang, W | - |
dc.contributor.author | Lau, KKL | - |
dc.contributor.author | Ren, C | - |
dc.contributor.author | Ng, E | - |
dc.date.accessioned | 2020-10-05T12:12:47Z | - |
dc.date.available | 2020-10-05T12:12:47Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Science of the Total Environment, 2020, v. 719, p. article no. 137461 | - |
dc.identifier.issn | 0048-9697 | - |
dc.identifier.uri | http://hdl.handle.net/10722/288430 | - |
dc.description.abstract | The re-integration of trees into the urban landscape is a veritable strategy for urban climate mitigation and adaptation. However, dysfunctional trees in terms of urban heat mitigation are dominant in many sub-tropical cities' landscapes due to the lack of scientific basis of tree selection. Therefore, this study proposes and evaluates a methodological framework as an approach for “right tree, right place” for urban heat mitigation through parametric ENVI-met simulations that involve the combination of 54 generic tree forms and 10 characteristic urban morphology – Sky-View Factor (SVF). Results show variable temperature regulation by tree forms (species) with varying magnitude in different urban morphology. Daytime and nighttime temperature regulation effects were between 0.3 °C – 1.0 °C and 0.0 °C – 2.0 °C, respectively depending on tree forms and SVF value. Furthermore, the Heat Reduction Potential (HRP) of trees forms were determined in terms of their human thermal comfort improvement. In general, we found a range of +5% and − 20% depending on SVF, negative and positive values imply heat reduction and increment, respectively. With the competing shading effect of buildings, the HRP of trees reduces from high to low SVF area with variable magnitude among tree forms (species). Hence, the proposed morphology-based tree selection approach was evaluated by comparison with two uninformed selection approaches in a realistic urban neighborhood in Hong Kong. Results clearly indicate the proposed approach's capability in improving human thermal comfort by up two times more than either of the other approaches. Finally, evidence-based recommendations were given for the reference of policy-makers when they make urban green development plan. | - |
dc.language | eng | - |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/scitotenv | - |
dc.relation.ispartof | Science of the Total Environment | - |
dc.subject | UHI | - |
dc.subject | thermal comfort | - |
dc.subject | Tree-plantingTree forms (species) | - |
dc.subject | Street-canyon | - |
dc.subject | Urban densities | - |
dc.title | Right tree, right place (urban canyon): Tree species selection approach for optimum urban heat mitigation - development and evaluation | - |
dc.type | Article | - |
dc.identifier.email | Ren, C: renchao@hku.hk | - |
dc.identifier.authority | Ren, C=rp02447 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.scitotenv.2020.137461 | - |
dc.identifier.pmid | 32114235 | - |
dc.identifier.scopus | eid_2-s2.0-85080092632 | - |
dc.identifier.hkuros | 315812 | - |
dc.identifier.volume | 719 | - |
dc.identifier.spage | article no. 137461 | - |
dc.identifier.epage | article no. 137461 | - |
dc.identifier.isi | WOS:000521936300107 | - |
dc.publisher.place | Netherlands | - |
dc.identifier.issnl | 0048-9697 | - |