生态环境学报2017，Vol.26Issue(12)：2134-2139,6.DOI:10.16258/j.cnki.1674-5906.2017.12.018
采暖季4种结构的城市绿地对PM2.5和PM10的调控作用
Regulation of PM2.5 and PM10 in 4 Types of Urban Greenbelt in Heating Season
摘要
Abstract
In order to study how urban green spaces of different structures regulate PM2.5 and PM10 and its relationship with meteorological factors in heating season, from November 2015 to April 2016, four kinds of dusk-blocking urban green spaces with control groups were selected to monitor their PM2.5, PM10, temperature, humidity, wind speed, light intensity every two hours from 07:00 to 21:00 in the central positions of four green spaces simultaneously. Then the particulate mass concentrations of different green space types with their reduction effects on PM2.5 and PM10 were compared and analyzed. The regulation of four kinds of urban green space on PM2.5 and PM10 and its relationship with main environmental factors were compared and analyzed. It was suggested that in heating season, daily mean values of the PM2.5 were sorted: CK (112 μg?m-3)>Arbor-shrub-herb (108 μg?m-3)>Big-deciduous-herb (107 μg?m-3)>Little-deciduous-herb (106 μg?m-3)>Conifer-herb (100 μg?m-3) and those of the PM10 were sorted:(CK (235 μg?m-3)>Arbor-shrub-herb (226 μg?m-3)>Little-deciduous-herb (224 μg?m-3)>Big-deciduous-herb (223 μg?m-3)> Conifer (211 μg?m-3)). The value of the PM2.5 and PM10 in CK was obviously larger than the others (P<0.05), The mean values of PM2.5 and PM10 at an interval of 2 h ranged from 81 to 133 μg?m-3 and 170 to 278 μg?m-3 respectively, presenting an extremely remarkable correlativity (P<0.01), both of which reached the peak around 09:00 and the lowest value at about 15:00, then showing an increase trend till 21:00. After heating started, monthly mean values of PM2.5 and PM10 rose steadily, yet significantly affected by large-scale meteorological factors. There were no significant differences among the daily mean values of PM2.5 and PM10 in four kinds of urban green spaces, of which the average reduction rates were sorted by size: Conifer-herb>Arbor-shrub-herb>Big-deciduous-herb>Little-deciduous-herb. Besides, the reduction rate of Conifer-herb exceeded those of other green space types remarkably. The reduction rates of the four green spaces on PM2.5 and PM10 had a significant negative correlation with the temperature (P<0.05). Only the reduction rate of PM2.5 was positively correlated with humility to a remarkable extent (P<0.05), and its correlation with wind speed and light was not obvious. In the urban green space construction, the configuration of coniferous trees can be increased to reduce the mass concentration of atmospheric particulate matter.关键词
采暖季/城市绿地/PM2.5/PM10Key words
heating season/urban green space/PM2.5/PM10分类
资源环境引用本文复制引用
刘宇,王晓立,董蓉,李素华,韩浩章..采暖季4种结构的城市绿地对PM2.5和PM10的调控作用[J].生态环境学报,2017,26(12):2134-2139,6.基金项目
国家星火计划项目(2013GA690424) （2013GA690424）
江苏省高等教育学会"十三五"规划课题(16YB186) （16YB186）
2017 年度市级产业发展引导资金(科技创新资金)项目"雾霾天人体呼吸高度城市绿地对 PM2.5 等颗粒物消减作用研究及示范" （科技创新资金）
