The regulation effect of urban green space on air particulate matter concentration under different matrices in Xi'an city

IF 2.9 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Air Quality Atmosphere and Health Pub Date : 2024-04-15 DOI:10.1007/s11869-024-01555-w
Bo Jiang, Shiyu Fan, Chang Sun, Sen Mu, Tian Gao, Ling Qiu
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Abstract

Urban green space can effectively alleviate air pollution, in which vegetation structure plays an important role. However, these green spaces with varying vegetation structures exist in different environmental backgrounds of the city. By analyzing the influence of the different environmental backgrounds on the dust retention effect of green spaces with varying vegetation structures, green spaces can be truly utilized as a solution in alleviating air pollution. Therefore, according to the typical characteristics of landscape patterns and different coverage ratios of green areas in Xi’an city, China, the matrices of urban landscape were divided into three types, which include "green space", "grey-green mixed space" and "gray space." In each environmental background, urban green space was divided into three levels: horizontal structure, species composition and vertical structure. Subsequently, 13 types of green spaces with different vegetation structures and three hard (no vegetation present) squares as control groups were selected. A one-year on-site monitoring was conducted on urban green spaces and concentrations of TSP, PM10, PM2.5 and PM1. The results showed that: (1) In the green space, the concentrations of PM1 and PM2.5 were relatively higher. In the grey-green mixed space, the average concentration of air particle of all four particle sizes was the lowest. In the gray space, the concentrations of PM10 and TSP were more concentrated. (2) Under the same matrices, due to the different locations of the plots, the concentration of air particles of different sizes was significantly different. Under the different urban environmental backgrounds, temperature, relative humidity, wind speed and air pressure all showed the same trend in the change of air particle concentration. (3) The one-layer green space structure was most suitable for planting. Considering the green space, the coniferous one-layered green space (CO) structure was recommended. The partly-closed broad-leaved one-layered green space (P-CBO) was found to be more suitable for the grey-green mixed space. Considering the gray space in the city center, it was suggested to plant the closed mixed coniferous and broad-leaved one-layered green space (CMO) structure. The findings provide empirical support for the future collocation of urban green vegetation structure and the improvement of urban air quality.

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西安市不同基质下城市绿地对空气颗粒物浓度的调节作用
城市绿地可以有效缓解空气污染,其中植被结构发挥着重要作用。然而,这些植被结构各异的绿地存在于城市不同的环境背景中。通过分析不同环境背景对不同植被结构绿地滞尘效果的影响,可以真正发挥绿地在缓解空气污染方面的作用。因此,根据中国西安市典型的景观格局特征和不同的绿地覆盖率,将城市景观矩阵划分为 "绿色空间"、"灰绿混合空间 "和 "灰色空间 "三种类型。在每种环境背景下,城市绿地分为三个层次:水平结构、物种组成和垂直结构。随后,选择了 13 种不同植被结构的绿地和 3 个硬质(无植被)广场作为对照组。对城市绿地和 TSP、PM10、PM2.5 和 PM1 的浓度进行了为期一年的现场监测。结果表明(1)在绿地中,PM1 和 PM2.5 的浓度相对较高。灰绿混合空间中,四种粒径的空气颗粒物平均浓度最低。在灰色空间中,PM10 和 TSP 的浓度较为集中。(2)在相同的矩阵下,由于地块的位置不同,不同粒径的空气颗粒物浓度有明显差异。在不同的城市环境背景下,温度、相对湿度、风速和气压对空气颗粒物浓度的变化趋势相同。(3)单层绿地结构最适合种植植物。考虑到绿地面积,建议采用针叶单层绿地(CO)结构。半封闭阔叶单层绿地(P-CBO)更适合灰绿混合空间。考虑到市中心的灰空间,建议种植封闭式针叶和阔叶混合单层绿地(CMO)结构。研究结果为未来城市绿色植被结构的搭配和城市空气质量的改善提供了实证支持。 图文摘要
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来源期刊
Air Quality Atmosphere and Health
Air Quality Atmosphere and Health ENVIRONMENTAL SCIENCES-
CiteScore
8.80
自引率
2.00%
发文量
146
审稿时长
>12 weeks
期刊介绍: Air Quality, Atmosphere, and Health is a multidisciplinary journal which, by its very name, illustrates the broad range of work it publishes and which focuses on atmospheric consequences of human activities and their implications for human and ecological health. It offers research papers, critical literature reviews and commentaries, as well as special issues devoted to topical subjects or themes. International in scope, the journal presents papers that inform and stimulate a global readership, as the topic addressed are global in their import. Consequently, we do not encourage submission of papers involving local data that relate to local problems. Unless they demonstrate wide applicability, these are better submitted to national or regional journals. Air Quality, Atmosphere & Health addresses such topics as acid precipitation; airborne particulate matter; air quality monitoring and management; exposure assessment; risk assessment; indoor air quality; atmospheric chemistry; atmospheric modeling and prediction; air pollution climatology; climate change and air quality; air pollution measurement; atmospheric impact assessment; forest-fire emissions; atmospheric science; greenhouse gases; health and ecological effects; clean air technology; regional and global change and satellite measurements. This journal benefits a diverse audience of researchers, public health officials and policy makers addressing problems that call for solutions based in evidence from atmospheric and exposure assessment scientists, epidemiologists, and risk assessors. Publication in the journal affords the opportunity to reach beyond defined disciplinary niches to this broader readership.
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