Measured nighttime effect of green, blue, and grey features on thermal exposure: A pilot study in Czech cities

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985807%3A_____%2F25%3A00637351" target="_blank" >RIV/67985807:_____/25:00637351 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989592:15310/25:73633393

Výsledek na webu

<a href="https://doi.org/10.1016/j.enbuild.2025.115952" target="_blank" >https://doi.org/10.1016/j.enbuild.2025.115952</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.enbuild.2025.115952" target="_blank" >10.1016/j.enbuild.2025.115952</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measured nighttime effect of green, blue, and grey features on thermal exposure: A pilot study in Czech cities

Popis výsledku v původním jazyce

Human thermal comfort has been the focus of research in urban areas of temperate climates due to the need for the implementation of adequate climate change adaptation measures in urban design. Public spaces have been mostly assessed in terms of the effect of blue and green infrastructure on thermal stress during hot summer days, however, the increasing number of hot summer nights also draws attention to the so far understudied nighttime period. In this study, we focused on the nighttime effect of blue, green, and grey elements on thermal exposure. We performed a series of nighttime measurements to obtain data on air temperature (ta), mean radiant temperature (MRT), UTCI, and PET over various types of surfaces and under trees and shade sails. Trees lead to higher nighttime ta (up to +1.0 °C), MRT (up to +3.9 °C), UTCI (up to +2.4 °C), and PET (up to 4.3 °C) in comparison to open areas, yet without changes in the category of thermal stress. A less pronounced effect was observed under shade sails (up to + 0.6 °C in ta, +1.0 °C in MRT, +0.4 °C in UTCI, +0.6 °C in PET). Pervious surfaces, such as grass or gravel, supported nighttime cooling more than impervious pavement. The cooling effect of a splash fountain continued into the nighttime even after the fountain had been turned off, but elevated fountains did not have any measurable effect on thermal exposure during the night. The PET values and heat stress categories were generally more variable at night than UTCI, which deserves further attention.

Název v anglickém jazyce

Measured nighttime effect of green, blue, and grey features on thermal exposure: A pilot study in Czech cities

Popis výsledku anglicky

Human thermal comfort has been the focus of research in urban areas of temperate climates due to the need for the implementation of adequate climate change adaptation measures in urban design. Public spaces have been mostly assessed in terms of the effect of blue and green infrastructure on thermal stress during hot summer days, however, the increasing number of hot summer nights also draws attention to the so far understudied nighttime period. In this study, we focused on the nighttime effect of blue, green, and grey elements on thermal exposure. We performed a series of nighttime measurements to obtain data on air temperature (ta), mean radiant temperature (MRT), UTCI, and PET over various types of surfaces and under trees and shade sails. Trees lead to higher nighttime ta (up to +1.0 °C), MRT (up to +3.9 °C), UTCI (up to +2.4 °C), and PET (up to 4.3 °C) in comparison to open areas, yet without changes in the category of thermal stress. A less pronounced effect was observed under shade sails (up to + 0.6 °C in ta, +1.0 °C in MRT, +0.4 °C in UTCI, +0.6 °C in PET). Pervious surfaces, such as grass or gravel, supported nighttime cooling more than impervious pavement. The cooling effect of a splash fountain continued into the nighttime even after the fountain had been turned off, but elevated fountains did not have any measurable effect on thermal exposure during the night. The PET values and heat stress categories were generally more variable at night than UTCI, which deserves further attention.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Energy and Buildings

ISSN

0378-7788

e-ISSN

1872-6178

Svazek periodika

343

Číslo periodika v rámci svazku

September 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

115952

Kód UT WoS článku

001505070900001

EID výsledku v databázi Scopus

2-s2.0-105007112278