Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 29, Issue 49, Pages 74394-74406Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-022-21037-9
Keywords
Ventilation corridors; Local climate zones; Frontal area index; Urban heat island; Land surface temperature; Dalian City
Categories
Funding
- National Natural Science Foundation of China [41771178, 42030409]
- Fundamental Research Funds for the Central Universities [N2111003]
- Basic Scientific Research Project (Key Project) of the Education Department of Liaoning Province [LJKZ0964]
- Second Tibetan Plateau Scientific Expedition and Research Program (STEP) [2019QZKK1004]
- Innovative Talents Support Program of Liaoning Province [LR2017017]
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The study found that urban ventilation corridors are effective in mitigating the urban heat island effect and improving urban livability. The impact of ventilation corridors on heat island intensity varies with different local climate zones, with scattered tree areas showing the greatest mitigation effect.
Urban ventilation corridors introduce fresh air into urban interiors and improve urban livability, while mitigating the urban heat island (UHI) effect. However, few studies have assessed the impact of urban ventilation corridors on UHI intensity (UHII) from the perspective of the local climates of different cities. Therefore, this study integrated multisource data to construct ventilation corridors from the perspective of local climate zone (LCZ) and analyzed its impact on UHII. The results showed the following: (1) the average UHII of constructed LCZs was higher than that of natural LCZs, among which the building type LCZ10 (heavy industry) had the highest intensity (5.77 degrees C); (2) in extracted ventilation corridors, the pixel number of natural LCZs was substantially larger than that of constructed LCZs, among which LCZE (bare soil/paved) was the largest; and (3) for natural LCZs, the average UHII of each LCZ was lower within the ventilated corridors than within the non-ventilated corridors (except for LCZG [water]), with the UHII of LCZB (scattered trees) exhibiting the greatest mitigation effect. Quantitative research on the composition and function of ventilation corridors can not only assess the ability of ventilation corridors to mitigate UHIs, but also provide a reference for urban ventilation corridor planning.
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