南京林业大学学报（自然科学版）2017，Vol.41Issue(2)：187-192,6.DOI:10.3969/j.issn.1000-2006.2017.02.028
公园绿地及周边环境PM2.5浓度特征及影响因素
Analysis of influence factors and characteristics of PM2.5 concentration in a public park and surroundings areas
摘要
Abstract
[Objective] Evaluate the PM2.5 retention capacity of a public park and discuss the effects of environmental factors on PM2.5 concentrations in order to provide references for pollution control of PM2.5 . [Method] PM2.5 concentra?tions within Beixiaohe Park in Beijing, indoor environment ( the golf club) and along the roadside ( open space) near the park were monitored to compare the differences in PM2.5 concentrations in different environments. [Result] ①Diur?nal variation in characteristics of PM2.5 concentration in the three environments were the same. The results showed a curve with one "valley" between two "peaks", indicating that PM2.5 concentrations were high in the morning and at night and low during the daytime.②When the air was not, or only slightly polluted, PM2.5 concentration within the pub?lic park was lower than that indoors and along the roadside by 5.7% and 6.9%, respectively. This showed that the public park had a certain PM2.5 retention capacity. When the air was mid?level polluted, PM2.5 concentration within the public park decreased compared to that indoors and along the roadside by 3. 6% and 7. 3%, respectively, thus confirming the PM2.5 retention capacity of the public park. When the air was highly polluted, PM2.5 concentration within the public park was slightly lower than that along the roadside by 0. 3%, and higher than that indoors by 5.5%. ③ PM2.5 concentration within the public park was negatively correlated with air temperature and wind speed, and positively correlated with air humidity and air pressure. Moreover, PM2.5 concentration along the roadside was positively correlated with vehicle flow rate. [Conclusion] When the air was not, or only slightly, or mid?level polluted, the public park had a certain PM2.5 re?tention capacity, which was influenced by the local climatic conditions.关键词
公园/滞留/细颗粒物/PM2.5/环境要素Key words
public park/retention/fine particulate matter/PM2.5/environmental factors分类
农业科技引用本文复制引用
赵松婷,李新宇,李延明,于秋雅..公园绿地及周边环境PM2.5浓度特征及影响因素[J].南京林业大学学报（自然科学版）,2017,41(2):187-192,6.基金项目
国家自然科学基金应急管理项目(31540010) （31540010）
