生态环境学报2016，Vol.25Issue(3)：447-457,11.DOI:10.16258/j.cnki.1674-5906.2016.03.012
北京城市森林PM2.5质量浓度特征及影响因素分析
Analysis on Characteristics and Influential Factors of PM2.5 Mass Concentration in Beijing’s Urban Forest
摘要
Abstract
We selected two observation points in vegetation areas, and Beijing Xishan forest park forest is forest interior observation point, Beijing haidian botanical garden as forest outside control point, to study characteristics of urban forest’s PM2.5mass concentration and to analyze its influence factors. The results showed that: The daily variation of PM2.5 mass concentration is "double peak valley" in forest interior and outside. Around 8:00 and 21:00 are two peak values of the day, around 15:00 and 4:00 are valley values of the day. The PM2.5concentration in inside forest (104.02μg·m-3) is higher than it in outside forest (82.515μg·m-3). In a year, PM2.5mass concentration in summer is lowest, which is second in Autumn and is third in spring. PM2.5mass concentration in winter is highest. Annual variation of PM2.5mass concentration is winter (115.46μg·m-3) > spring (112.39μg·m-3) > autumn (106.37μg·m-3) > summer (81.87μg·m-3) in forest interior, and winter (97.35μg·m-3) > spring (94.07μg·m-3) > autumn (93.17μg·m-3) > summer (61.86μg·m-3) in forest outside. Different meteorological factors, temperature, precipitation and wind are negative correction with PM2.5concentration. Sunny days in a row, air convection is strong, PM2.5 concentration is relatively low; precipitation has cutting effect on PM2.5,the wind can disperse the PM2.5; and PM2.5concentration is higher than other weather conditions in high temperature and high humidity. Richen theory about forest’s purifying atmosphere. And provide the evidence for related policy that environmental protection departments make.关键词
林内(北京西山公园)/林外(北京海淀植物园)/PM2.5质量浓度特征/影响因素Key words
inside forest (Beijing xishan park)/outside forest (Beijing haidian botanical garden)/characteristics of PM2.5 mass concentration/influential factors分类
资源环境引用本文复制引用
蒋燕,陈波,鲁绍伟,李少宁..北京城市森林PM2.5质量浓度特征及影响因素分析[J].生态环境学报,2016,25(3):447-457,11.基金项目
北京市农林科学院青年科研基金项目 （）
