景观防护林带PM2.5与环境因子的关系研究
Relationship between PM2.5 and environmental factors in landscape shelterbelt
邱苏梅 1李立文 2万欣 3邢玮3
作者信息
- 1. 江苏省林业科学研究院,江苏 南京 211153;扬州大学园艺园林学院,江苏 扬州 225009
- 2. 扬州大学园艺园林学院,江苏 扬州 225009
- 3. 江苏省林业科学研究院,江苏 南京 211153;江苏扬州城市森林生态系统国家定位观测研究站,江苏 扬州 225000
- 折叠
摘要
以长江沿岸的典型景观防护林为研究对象,选取榔榆、乌桕、落羽杉和薄壳山核桃 4 种纯林类型的景观防护林,于 2023 年监测PM2.5、风速、风向、光照度、空气湿度、空气温度、气压、土壤温度和土壤湿度的季度变化.发现乌桕防护林带PM2.5 质量浓度变化幅度较大,夏季明显低于冬季,而其他 3 个防护林带PM2.5 质量浓度季节变化幅度不大.通过相关性分析发现PM2.5 与多个环境因子有相关性,尤其是乌桕防护林带.为了探究各环境因子对PM2.5 的影响,该研究引入随机森林模型,结果表明在长江沿岸的典型景观防护林中空气湿度是影响PM2.5 质量浓度的主要环境因子.该研究结果为未来建构科学合理的防护林体系提供了理论依据.
Abstract
In this paper,with the typical landscape protection forest along the Yangtze River as the research object,four pure forest types of landscape protection forest including Ulmus parvifolia,Sapium sebiferum,Taxidium distichum and Carya illinoensis were selected to monitor the season change of PM2.5,wind speed,wind direction,light intensity,air hu-midity,air temperature,air pressure,soil temperature and soil humidity in 2023.We found that the variation range of PM2.5 concentration in S.sebiferum shelterbelts was large,which was significantly lower in summer than in winter while the seasonal variation range of PM2.5 concentration in the other three shelterbelts was not large.The correlation analysis found that PM2.5 was correlated with many environmental factors,especially in S.sebiferum shelterbelt.In order to explore the impact of various environmental factors on PM2.5,the random forest model was applied in this study.The result showed that air humidity was the main environmental factor affecting PM2.5 concentration in typical landscape shelterbelts along the Yangtze River.The results could provide a theoretical basis for constructing a scientific and reasonable shelterbelt system in the future.
关键词
防护林带/PM2.5/环境因子/随机森林模型/长江Key words
Shelterbelt/PM2.5/Environmental factor/Random forest model/The Yangtze River引用本文复制引用
基金项目
江苏省农业科技自主创新资金项目(CX191004)
江苏省林业科技创新与推广项目(LYKJ[2021]38)
江苏省森林、湿地定位监测长期科研基地(LYKJ[2020]21)
出版年
2024
NETL
NSTL
万方数据