Street orientation and side of the street greatly influence the microclimatic benefits street trees can provide in summer
Maintaining human thermal comfort (HTC) is essential for pedestrians because people outside can be more susceptible to heat stress and heat stroke. Modification of street microclimates using tree canopy cover can provide important benefits to pedestrians, but how beneficial and under what circumstan...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Society of Agronomy
2016
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| Online Access: | http://psasir.upm.edu.my/id/eprint/53898/ http://psasir.upm.edu.my/id/eprint/53898/1/Street%20orientation%20and%20side%20of%20the%20street%20greatly%20influence%20the%20microclimatic%20benefits%20street%20trees%20can%20provide%20in%20summer.pdf |
| _version_ | 1848852405257502720 |
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| author | Mohd Sanusi, Ruzana Adibah Johnstone, Denise May, Peter Livesley, Stephen John |
| author_facet | Mohd Sanusi, Ruzana Adibah Johnstone, Denise May, Peter Livesley, Stephen John |
| author_sort | Mohd Sanusi, Ruzana Adibah |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Maintaining human thermal comfort (HTC) is essential for pedestrians because people outside can be more susceptible to heat stress and heat stroke. Modification of street microclimates using tree canopy cover can provide important benefits to pedestrians, but how beneficial and under what circumstances is not clear. On sunny summer days, microclimatic measures were made in residential streets with low and high percentages of tree canopy cover in Melbourne, Australia. Streets with east-west (E-W) and streets with north-south (N-S) orientation were repeatedly measured for air temperature, relative humidity, wind speed, solar radiation, and mean radiant temperature on both sides of the street between early morning and midafternoon. Physiological equivalent temperature was estimated to indicate HTC throughout the day. In streets with high-percentage canopy cover, air temperature, relative humidity, solar radiation, and mean radiant temperature were significantly lower than in streets with low-percentage canopy cover. The reductions in air temperature under high-percentage canopy cover were greater for E-W streets (2.1°C) than for N-S streets (0.9°C). For N-S streets, air temperature, mean radiant temperature, and solar radiation were greater on the east pavement in the early morning and greatest on the west pavement in the midafternoon. The midday thermal benefits are restricted to E-W streets, which are oriented in the same direction as the summer sun's zenith. High-percentage canopy cover reduced wind speeds but not enough to offset the other microclimate benefits. These findings can assist urban planners in designing street tree landscapes for optimal HTC in summer, especially in areas of high pedestrian density. |
| first_indexed | 2025-11-15T10:37:33Z |
| format | Article |
| id | upm-53898 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T10:37:33Z |
| publishDate | 2016 |
| publisher | American Society of Agronomy |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-538982018-02-20T09:31:00Z http://psasir.upm.edu.my/id/eprint/53898/ Street orientation and side of the street greatly influence the microclimatic benefits street trees can provide in summer Mohd Sanusi, Ruzana Adibah Johnstone, Denise May, Peter Livesley, Stephen John Maintaining human thermal comfort (HTC) is essential for pedestrians because people outside can be more susceptible to heat stress and heat stroke. Modification of street microclimates using tree canopy cover can provide important benefits to pedestrians, but how beneficial and under what circumstances is not clear. On sunny summer days, microclimatic measures were made in residential streets with low and high percentages of tree canopy cover in Melbourne, Australia. Streets with east-west (E-W) and streets with north-south (N-S) orientation were repeatedly measured for air temperature, relative humidity, wind speed, solar radiation, and mean radiant temperature on both sides of the street between early morning and midafternoon. Physiological equivalent temperature was estimated to indicate HTC throughout the day. In streets with high-percentage canopy cover, air temperature, relative humidity, solar radiation, and mean radiant temperature were significantly lower than in streets with low-percentage canopy cover. The reductions in air temperature under high-percentage canopy cover were greater for E-W streets (2.1°C) than for N-S streets (0.9°C). For N-S streets, air temperature, mean radiant temperature, and solar radiation were greater on the east pavement in the early morning and greatest on the west pavement in the midafternoon. The midday thermal benefits are restricted to E-W streets, which are oriented in the same direction as the summer sun's zenith. High-percentage canopy cover reduced wind speeds but not enough to offset the other microclimate benefits. These findings can assist urban planners in designing street tree landscapes for optimal HTC in summer, especially in areas of high pedestrian density. American Society of Agronomy 2016 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/53898/1/Street%20orientation%20and%20side%20of%20the%20street%20greatly%20influence%20the%20microclimatic%20benefits%20street%20trees%20can%20provide%20in%20summer.pdf Mohd Sanusi, Ruzana Adibah and Johnstone, Denise and May, Peter and Livesley, Stephen John (2016) Street orientation and side of the street greatly influence the microclimatic benefits street trees can provide in summer. Journal of Environmental Quality, 45 (1). pp. 167-174. ISSN 0047-2425; ESSN: 1537-2537 https://dl.sciencesocieties.org/publications/jeq/articles/45/1/167 Street orientation; Microclimatic; Street trees; Summer 10.2134/jeq2015.01.0039 |
| spellingShingle | Street orientation; Microclimatic; Street trees; Summer Mohd Sanusi, Ruzana Adibah Johnstone, Denise May, Peter Livesley, Stephen John Street orientation and side of the street greatly influence the microclimatic benefits street trees can provide in summer |
| title | Street orientation and side of the street greatly influence the microclimatic benefits street trees can provide in summer |
| title_full | Street orientation and side of the street greatly influence the microclimatic benefits street trees can provide in summer |
| title_fullStr | Street orientation and side of the street greatly influence the microclimatic benefits street trees can provide in summer |
| title_full_unstemmed | Street orientation and side of the street greatly influence the microclimatic benefits street trees can provide in summer |
| title_short | Street orientation and side of the street greatly influence the microclimatic benefits street trees can provide in summer |
| title_sort | street orientation and side of the street greatly influence the microclimatic benefits street trees can provide in summer |
| topic | Street orientation; Microclimatic; Street trees; Summer |
| url | http://psasir.upm.edu.my/id/eprint/53898/ http://psasir.upm.edu.my/id/eprint/53898/ http://psasir.upm.edu.my/id/eprint/53898/ http://psasir.upm.edu.my/id/eprint/53898/1/Street%20orientation%20and%20side%20of%20the%20street%20greatly%20influence%20the%20microclimatic%20benefits%20street%20trees%20can%20provide%20in%20summer.pdf |