引用本文:蒋燕,熊好琴,鲁绍伟,陈波,李少宁,等.2015年北京采暖季城市森林内外SO2浓度的时空变化特征[J].环境科学研究,2017,30(11):1689-1696.
JIANG Yan,XIONG Haoqin,LU Shaowei,CHEN Bo,LI Shaoning,et al.Spatial-Temporal Variation of SO2 Concentration in Beijing's Urban Forest in Heating Season, 2015[J].Reserrch of Environmental Science,2017,30(11):1689-1696.]
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2015年北京采暖季城市森林内外SO2浓度的时空变化特征
蒋燕1,2, 熊好琴1, 鲁绍伟2, 陈波2, 李少宁2
1. 西南林业大学环境科学与工程学院, 云南 昆明 650224;2. 北京市农林科学院林业果树研究院, 北京燕山森林生态系统定位观测站, 北京林果业生态环境功能提升协同创新中心, 北京 100093
摘要:
为探讨采暖季城市森林内外ρ(SO2)动态变化及差异性,基于西山国家森林公园林内空气质量监测站数据,结合北京市环境保护监测中心植物园监测站的实时数据,分析2015年采暖季城市森林内外ρ(SO2)变化和影响因素.结果表明:林内外ρ(SO2)日变化基本呈双峰双谷型,在09:00-11:00和20:00-22:00左右达到高峰;采样期间ρ(SO2)月变化呈不显著"V"型,最高值出现在1月,林内外分别为(25.8±9.2)和(31.7±23.4)μg/m3,最低值出现在11月,林内外分别为(19.0±5.2)和(13.0±11.2)μg/m3.林内ρ(SO2)在1-3月低于林外,11-12月高于林外,林内ρ(SO2)变化较林外平缓;气象条件对采暖季城市森林ρ(SO2)变化有重要影响:降水对ρ(SO2)消减效应明显,大风有驱散SO2的作用,同时受风向影响;ρ(SO2)和温度关系不显著(P=0.05,R<0.40),但和空气相对湿度线性关系显著(α=0.05,Sig=0.00),林内受气象因素影响低于林外.研究显示,城市森林对气态污染物具有一定的缓冲、抵抗和吸收能力,因此应重视发展城市森林生态系统,充分发挥其生态效益,以提高城市大气环境质量.
关键词:  采暖季  西山国家森林公园  SO2  城市森林
DOI:10.13198/j.issn.1001-6929.2017.03.08
分类号:X511
基金项目:北京市农林科学院创新能力建设项目(KJCX20160301);林业科技创新平台运行补助项目(2017-LYPJ-DW001);北京市农林科学院科技创新团队项目(JWKST201609)
Spatial-Temporal Variation of SO2 Concentration in Beijing's Urban Forest in Heating Season, 2015
JIANG Yan1,2, XIONG Haoqin1, LU Shaowei2, CHEN Bo2, LI Shaoning2
1. Environmental Science and Engineering College, Southwest Forestry University, Kunming 650224, China;2. Beijing Collaborative Innovation Center for Eco-Envwonmental Improvement with Forestry and Fruit Tress, Yanshan Forest Ecosystem Research Station, Forestry and Pomology Institute, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China
Abstract:
The dynamics of air SO2 concentrations both inside and outside forests and their effect factors in Beijing were studied in heating season in 2015, based on real-time monitoring data collected from the monitoring station of the Beijing Botanical Garden and forest air quality station of Beijing Xishan Park. The results showed that the daily variation of SO2 concentrations both inside and outside the forest showed a ‘double peak-valley’ pattern, with the two peaks around 09:00-11:00 and 20:00-22:00. Monthly variation of SO2 concentrations showed a trend of inconspicuous ‘V’ shape. SO2 concentrations were the highest in January, being (25.8±9.2) and (31.7±23.4) μg/m3 inside and outside the forest, respectively, and were the lowest in November, being (19.0±5.2) and (13.0±11.2) μg/m3, respectively. Precipitation had an obvious effect to reduce SO2, because wind dispels SO2 depending on the wind direction. SO2 concentrations had a significant relationship with air humidity (P<0.01), but not with temperature. SO2 concentrations were lower inside the forest than outside the forest from January to March, but this was reversed from November to December. SO2 concentrations inside the forest showed weaker fluctuations than outside the forest due to being less influenced by meteorological factors. Our findings indicated that urban forest may buffer and absorb gaseous pollutants. Therefore, we should pay more attention to developing urban forest ecosystems and make full use of their ecological benefits to improve urban atmospheric environmental quality.
Key words:  heating season  Beijing Xishan Park  Beijing botanical garden  SO2  urban forest