Human Settlements Research Center, Liaoning Normal University, Dalian, 116029, China.
Jangho Architecture College, Northeastern University, Shenyang, 110169, China.
Environ Sci Pollut Res Int. 2022 Oct;29(49):74394-74406. doi: 10.1007/s11356-022-21037-9. Epub 2022 May 30.
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 °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.
城市通风廊道将新鲜空气引入城市内部，提高城市宜居性，同时缓解城市热岛（UHI）效应。然而，很少有研究从不同城市的局部气候角度评估城市通风廊道对 UHI 强度（UHII）的影响。因此，本研究综合多源数据，从局部气候区（LCZ）的角度构建通风廊道，并分析其对 UHII 的影响。结果表明：（1）构建 LCZ 的平均 UHII 高于自然 LCZ，其中建筑类型 LCZ10（重工业）强度最高（5.77°C）；（2）在提取的通风廊道中，自然 LCZ 的像素数明显大于构建 LCZ，其中 LCZE（裸土/铺砌）最大；（3）对于自然 LCZ，通风廊道内每个 LCZ 的平均 UHII 均低于非通风廊道（LCZG [水]除外），LCZB（分散树木）的 UHII 缓解效果最大。对通风廊道组成和功能的定量研究不仅可以评估通风廊道缓解 UHI 的能力，还可以为城市通风廊道规划提供参考。
