摘要
随着人们生活质量的提高和环保意识的增强,对森林生态保健功能的研究也越来越关注,而林分内外空气颗粒物浓度的高低是评价其好坏的标准之一。该文以福州旗山森林公园福建柏为例,采用英国生产的Dustmate粉尘监测仪,对春季其林内和林缘空气颗粒物进行了30 d的观测,旨在为福建柏游憩林的选择利用提供理论依据。结果表明:(1)林内和林缘4种粒径颗粒物浓度整体日变化相似,白天呈"W"型,夜间呈"N"型。林内外在13:00-15:00、19:00-21:00和3:00-5:00时间段出现高峰期;低谷期出现在7:00-9:00、15:00-17:00和1:00-3:00。林内颗粒物以细颗粒为主,而林缘则以粗颗粒物为主。(2)对于福建柏林内和林缘,4种不同粒径空气颗粒物日变化趋势大体相似,夜间平均质量浓度高于白天,TSP与PM10高峰期浓度值是低谷期浓度值的1.4倍和1.6倍;PM2.5与PM1.0高峰期浓度值分别是低谷期浓度值的1.6倍和1.9倍。(3)空气颗粒物质量浓度与小气候的相关性分析表明:湿度、光照均与其呈正相关,而温度、风速呈负相关,且林缘的颗粒物质量浓度与风速呈显著负相关。按照《环境空气质量标准》(GB 3095-2012)对其进行综合评价,春季福建柏林内外空气质量良好,有利于生态保健功能的开发和利用。
As the improvement of residents＇ living standard and environmental awareness,there has been more attention paid to the study regarding the healthcare function of forest ecology,and the concentration of airborne particles in and out of forest stand is one of the criteria to evaluate their quality. Taking Fokienia hodginsii forest in Qishan Park of Fuzhou as an example,Dustmate detector which was made in British was used to monitor the data of PM concentration within and outside of the forest in 30 days during spring,in order to provide a theoretical basis for selection and use of Fokienia hodginsii recreational forest. The results indicated that the concentration diurnal variation of the four different kinds of diameter airborne particles within and outside of the forest was similar,which became the＂W＂shaped by day and＂N＂shaped by night,with the peak appeared at 13：00-15：00,19：00-21：00 and 3：00-5：00;and the valley phase appeared at 7：00-9：00,15：00-17：00 and 1：00-3：00. The particulate matter within the forest were maily composed of fine particles, and coarse particles dominated in the particulate matter at the outside of the forest. The tendency of the diurnal variation of four different kinds ofdiameter airborne particles within and outside of the forest were similar,and the concentration at night got higher than daytime,with TSP and PM10 peak value 1.4 and 1.6 times than that of the valley phases;and PM2.5 and PM1.0 peak value 1.6 and 1.9 times than that of the valley phases. The correlation analysis of the particulate matter and local microclimate indicated that it had positive correlation with humidity and illumination,and negative with temperature and wind speed. The PM concentration at the outside of the forest showed significantly negative relation with the wind speed. According to the comprehensive assessment based on the Ambient Air Quality Standard,in spring,the good air quality within and outside of the Fokienia hodginsii forest was in favour of developing and taking advantage of the healthcare effects of ecology.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2017年第10期176-184,共9页
Environmental Science & Technology
基金
林业公益性行业科研专项经费课题:增强森林滞留PM2.5等颗粒物的能力调控技术研究(201304301-05)
国家“十二五”科技支撑计划重大项目课题:城镇景观防护林体系构建技术研究(2011BAD38B03)
关键词
春季
福建柏
林内外
空气颗粒物
变化特征
spring
Fokienia hodginsii forest
in and outside forest
airborne particulate matter
change characteristics
