夏季干旱半干旱城市公园绿地空气负离子与空气颗粒物变化特征

侯秀娟; 闫晓云; 王波; 李心愿; 包红光

doi:10.12302/j.issn.1000-2006.202104048

侯秀娟, 闫晓云, 王波, 李心愿, 包红光

南京林业大学学报（自然科学版） ›› 2022, Vol. 46 ›› Issue (4) : 212-220.

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南京林业大学学报（自然科学版） ›› 2022, Vol. 46 ›› Issue (4) : 212-220. DOI: 10.12302/j.issn.1000-2006.202104048

研究论文

夏季干旱半干旱城市公园绿地空气负离子与空气颗粒物变化特征

作者信息 +

Variation characteristics of the air anion and air particulate matter in arid and semi-arid urban park green spaces during summer

Author information +

文章历史 +

摘要

【目的】观测北方干旱半干旱城市公园绿地不同植被结构空气负离子浓度与空气颗粒物浓度,并评价影响因素及其交互影响,为北方城市居民选择游憩时间及公园建设提供科学依据。【方法】于2020年7—8月,同步观测呼和浩特市敕勒川公园5种植被结构及对照点空气负离子浓度、空气颗粒物浓度,分析空气负离子与空气颗粒物变化特征及其影响因素。【结果】不同植被结构空气负离子浓度基本呈“V”形变化特征,空气颗粒物浓度最高值出现在早晨,最低值出现在下午;不同植被结构空气负离子浓度均值均高于对照点,且复层植被结构产生的负离子浓度要高于单层植被结构,不同植被结构对空气颗粒物浓度的调控存在着削减和集聚并存的效应;气象因子是影响空气负离子和空气颗粒物浓度的主要因素,风速与空气负离子浓度间显著负相关,温度与空气负离子浓度、总悬浮颗粒物(TSP)和PM₁₀浓度间显著负相关,相对湿度与空气负离子浓度、TSP和PM₁₀浓度间显著正相关,露点温度与PM_2.5和PM_1.0浓度间显著正相关;空气负离子浓度与PM_1.0浓度间显著负相关。【结论】复层植被结构较单层植被结构对提高空气负离子浓度有更加显著的作用,疏密适当的植被对减少空气颗粒物浓度起到积极作用;依据观测结果,建议城市周边居民开展休闲娱乐活动的最佳时间选择在9:00—10:00和14:00—17:00。

Abstract

【Objective】 To monitor the air anion concentration and air particulate matter concentration of different vegetation structures in arid and semi-arid urban park green spaces, the influencing factors and their interaction are analyzed, to provide a theoretical basis for urban residents to choose the recreation time and park construction. 【Method】 In July and August 2020, the air anion concentration and air particulate matter concentration were monitored simultaneously in five vegetation structures and their control points at Chilechuan Park in Hohhot, and the variations and influencing factors of the air anion and air particulate matter were analyzed. 【Result】 The air anion concentration of different vegetation structures had a “V” shaped variation. The highest value for the air particle matter concentration was recorded in the morning, and the lowest value was recorded in the afternoon. The average concentration of air anions in different vegetation structures was higher than that of the control point, and the air anion concentration in the multi-layer vegetation structure was higher than the single-layer vegetation structure. The reduction and agglomeration effect coexisted in the regulation of different vegetation structures. Meteorological factors were the main factors affecting the concentration of the air anions and air particulate matter. Wind speed was significantly negatively correlated with the concentration of air anions, with temperature being significantly negatively correlated with the concentration of air anions, TSP and PM₁₀. Relative humidity was significantly positively correlated with the concentration of air anions, TSP and PM₁₀. The dew point temperature was significantly positively correlated with PM_2.5 and PM_1.0 concentrations. There was a significant negative correlation between the air anion concentration and the PM_1.0 concentration. 【Conclusion】 The multi-layer vegetation structure had a significant effect on increasing the concentration of air anions than the single-layer vegetation structure, and the vegetation density played a positive role in reducing the concentration of the air particulate matter. In line with the results, it was suggested that the best time for residents around the city to carry out leisure activities was 9:00-10:00 and 14:00-17:00.

导出引用

侯秀娟, 闫晓云, 王波, 等. 夏季干旱半干旱城市公园绿地空气负离子与空气颗粒物变化特征[J]. 南京林业大学学报（自然科学版）. 2022, 46(4): 212-220 https://doi.org/10.12302/j.issn.1000-2006.202104048

HOU Xiujuan, YAN Xiaoyun, WANG Bo, et al. Variation characteristics of the air anion and air particulate matter in arid and semi-arid urban park green spaces during summer[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2022, 46(4): 212-220 https://doi.org/10.12302/j.issn.1000-2006.202104048

中图分类号： S731

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