| |
DOI: | 10.1016/j.ufug.2020.126815 |
Web URL(s): | https://www.sciencedirect.com/science/article/pii/S1618866720306324 Last checked: 1/19/2021 Access conditions: Item is within a limited-access website https://www.sciencedirect.com/science/article/pii/S1618866720306324/pdfft Last checked: 4/8/2021 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | Lam, Cho Kwong Charlie;
Gallant, Ailie J. E.;
Tapper, Nigel J. |
Author Affiliation: | Lam: School of Atmospheric Sciences, Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Guangzhou, China and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China and School of Earth, Atmosphere and Environment, Monash University, Clayton, Australia and CRC for Water Sensitive Cities, Melbourne, Australia; Gallant and Tapper: School of Earth, Atmosphere and Environment, Monash University, Clayton, Australia and CRC for Water Sensitive Cities, Melbourne, Australia |
Title: | Does irrigation cooling effect intensify during heatwaves? A case study in the Melbourne botanic gardens |
Source: | Urban Forestry & Urban Greening. Vol. 55, November 2020, p. [1-16]. |
Publishing Information: | Jena, Germany: Urban & Fischer |
# of Pages: | 16 |
Keywords: | Author-Supplied Keywords: Australia; Lanscape design; Microclimate; Royal Botanic Gardens Victoria; Urban heat mitigation; Urban vegetation
|
Abstract/Contents: | "Reducing night-time air temperature by irrigating urban greenery can ameliorate heat stress in cities. Past studies often used modelling approaches to investigate the irrigation cooling effect during heatwaves. However, few observational studies have compared the differences in micro-scale irrigation cooling effect between heatwave and non-heatwave conditions. This study examines whether nocturnal irrigation cooling effects intensify during heatwaves, as there have been conflicting results in the literature regarding this issue. During the Australian summer of December 2013 to March 2014, this study was conducted in the Royal Botanic Gardens Victorias Melbourne Gardens (mixture of Australian and exotic vegetation) and in the Australian Gardens of its Cranbourne Gardens (specialises in Australian vegetation). We used the excess heat factor (EHF) to identify one severe heatwave (EHF = 34.9) and one extreme heatwave (EHF = 155.6) in our study period. Using meteorological observations, irrigation data and one-way ANOVA, we present the differences in cooling associated with irrigation between different types of landscape in the two gardens. During non-heatwave conditions, there was 0.5 °C 1 °C of cooling associated with overnight irrigation of 2025 mm. During heatwave conditions, several lawn areas recorded greater cooling (2 °C 4 °C) associated with irrigation of similar amounts, but this phenomenon was not observed in areas dominated by hard surfaces. The magnitude and timing of the irrigation cooling effects also differed in various garden sites, with residual cooling effects observed lasting for several hours in certain sites following nocturnal irrigation events. Our results suggest that some significant cooling at the micro-scale is apparent from irrigated landscape in Melbourne, which has a temperate oceanic climate with occasional heatwaves. Moreover, the irrigation cooling effect in the Melbourne Gardens intensifies during heatwaves. Our findings could inform landscape succession planning to prepare for a hotter future climate." |
Language: | English |
References: | 67 |
Note: | "Article 126815" Satellite images Maps Pictures, color Figures Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Lam, C. K. C., A. J. E. Gallant, and N. J. Tapper. 2020. Does irrigation cooling effect intensify during heatwaves? A case study in the Melbourne botanic gardens. Urban Forestry & Urban Greening. 55:p. [1-16]. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=315314 |
| If there are problems with this record, send us feedback about record 315314. |
| Choices for finding the above item: |
| DOI: 10.1016/j.ufug.2020.126815 |
| Web URL(s): https://www.sciencedirect.com/science/article/pii/S1618866720306324 Last checked: 1/19/2021 Access conditions: Item is within a limited-access website https://www.sciencedirect.com/science/article/pii/S1618866720306324/pdfft Last checked: 4/8/2021 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: b5268048 |
| Find from within TIC: Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |