4.7 Article

Numerical modelling for analysis of the effect of different urban green spaces on urban heat load patterns in the present and in the future

Journal

COMPUTERS ENVIRONMENT AND URBAN SYSTEMS
Volume 87, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.compenvurbsys.2021.101600

Keywords

Urban heat load; Climate indices; Greening scenarios; Urban-scale modelling; Present climate; Climate change

Funding

  1. National Research, Development and Innovation Office, Hungary [NKFI K-120346]

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This paper focuses on the impact of urban green spaces on heat load mitigation, revealing that different types of green spaces have varying degrees of cooling effect on the environment. The study also suggests that in the future, the cooling effect of grassland-type green spaces will be further enhanced.
This paper focuses on urban green spaces in terms of climate and human thermal comfort containing their effect on heat load mitigation. It incorporates a modelling study in which the role of green spaces was investigated in terms of heat stress modification by applying MUKLIMO_3 model. During the experiment, the thermal effects of dense trees, scattered trees, grasslands and mixed green infrastructure has been investigated in the case of Szeged (Hungary) and assessed using different climate indices. The investigations encompassed 3 climatological time periods (1981-2010, 2021-2050 and 2071-2100) and two emission scenarios for future climate (RCP4.5 and RCP8.5). It was found that urban green spaces (e.g. parks) generally cool the environment, although, the cooling potential of the different green types differs. The highest reduction of heat load was found in the case of large urban parks comprising of dense trees near the downtown. The spatial extension of detected cooling was found small. However, it would increase during the future, especially in the case of grasslands. For urban planners, it is highly recommended to introduce new green sites within a city and to increase the spatial extension of the existing ones to mitigate and adapt to the impacts of climate change in the urban environment.

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