The influence of vertical canopy structure on the cooling and humidifying urban microclimate during hot summer days
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41320%2F23%3A97130" target="_blank" >RIV/60460709:41320/23:97130 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.landurbplan.2023.104841" target="_blank" >http://dx.doi.org/10.1016/j.landurbplan.2023.104841</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.landurbplan.2023.104841" target="_blank" >10.1016/j.landurbplan.2023.104841</a>
Alternative languages
Result language
angličtina
Original language name
The influence of vertical canopy structure on the cooling and humidifying urban microclimate during hot summer days
Original language description
Urban forests can mitigate urban heat effectively during hot summer days. Their cooling effects are largely determined by the plant canopy structure, which can be classified into three features: canopy density and horizontal and vertical canopy structures. This study aimed to identify the contribution of these canopy structural features to cooling effect of urban forests and how their contribution varies during the day. Near-surface air temperature and relative humidity were measured repeatedly between 07:00 - 10:00, 11:00 - 14:00, 16:00 - 19:00 and 21:00 - 24:00 during 16 summer days of 2021 using a mobile monitoring system at five urban parks and representative reference areas in Shanghai. To measure canopy structural features around each measurement point with a scale of 5 m, 10 m and 20 m radius buffers, each park was scanned by an unmanned aerial vehicle (UAV) laser scanner and an UAV multiple-spectrum image system. We found vertical canopy structure had great importance in explaining cooling effects and even exceeded the magnitude of air temperature reductions caused by leaf area index and canopy coverage during noon and nighttime. With increasing foliage height diversity (FHD), the cooling effect first decreased and then increased, when the turning point of FHD was approximately 0.5. Generally, sites with a high canopy coverage and an unevenly distributed canopy (FHD < 0.3) in high layers are recommended to provide better cooling effects in summer. Along with canopy density and horizontal structure, vertical canopy structure must be considered to optimize the cooling potential of urban forests in future planning.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10618 - Ecology
Result continuities
Project
<a href="/en/project/EF16_019%2F0000803" target="_blank" >EF16_019/0000803: Advanced research supporting the forestry and wood-processing sector´s adaptation to global change and the 4th industrial revolution</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Landscape and Urban Planning
ISSN
0169-2046
e-ISSN
0169-2046
Volume of the periodical
238
Issue of the periodical within the volume
2023
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
12
Pages from-to
1-12
UT code for WoS article
001049707100001
EID of the result in the Scopus database
2-s2.0-85165136697