开顶式气室的研制及其在 研究 臭氧影响加杨排放异戊二烯中的应用 | |
Alternative Title | Development of open-top chamber and its application in study of ozone effect on Populus canadensis isoprene emission |
王玉征 | |
Subtype | 硕士 |
Thesis Advisor | 刘俊锋 |
2019-06 | |
Degree Grantor | 中国科学院生态环境研究中心 |
Place of Conferral | 北京 |
Degree Name | 工程硕士 |
Degree Discipline | 环境工程 |
Keyword | 臭氧 植物源挥发性有机物 开顶式 气室 加杨 异戊二烯 Ozone, Biogenic Volatile Compounds, Open-top Chamber, Populus Canadensis, Isoprene |
Abstract | 植物源挥发性有机物(BVOCs)是植物释放的一类挥发性有机物,其对臭氧和二次有机气溶胶 的生成 具有显著贡献。臭氧是一种典型的植物毒素,可影响植物正常的生理生长过程, 进而 影响植物 BVOCs的排放,因此在区域性臭氧污染严重且有上升趋势的当下,研究臭氧浓度变化对植物 与大气间 BVOCs交换 的影响 ,尤其是 在 研究 BVOCs中 占比超过 50%的异戊二烯在不同臭氧浓度条件下的排放情况, 具有 重要的现实意义和 科学 意义。 开顶式气室是一种广泛用于研究植物对 气体浓度 变化响应的实验装置,但以往的设计 主要用于农作物, 在 用于研究臭氧浓度变化对生长迅速的加杨与大气间 BVOCs交换时 存在无法调节高度、与外界环境差异 较大 等问题。 另外, 课题组已有的 分辨率为 1h的 在线 VOCs分析仪 难以 满足 野外 BVOCs多 个 开顶式气室 的 同步采样 的分析 |
Other Abstract | Biogenic volatile compounds (BVOCs) are a kind of volatile organic compounds released to atmospheric by plants during their growth process, which contribute significantly to the formation of ozone and secondary organic aerosols. As a typical plant phytotoxin, ozone can affect the normal physiological growth process of plants and even affect the emission of BVOCs. It is of great practical and scientific significance to study the effect of ozone concentration to the exchange of BVOCs between plants and the atmosphere, especially the emission of isoprene, which accounts for more than 40% of BVOCs, when the regional ozone pollution is serious and rising. Open-top chamber is a kind of experimental device widely used to study the response of plants to climate change. However, previous designs were mainly used for crops. There are some problems such as the inability to adjust height and the great difference with the external environment when used to study the exchange of BVOCs between populus canadensis and the atmosphere when ozone concentration changes rapidly. In addition, the commonly used on-line instruments (such as VOCs analyzer with resolution of 1 h) can not meet the requirement of simultaneous sampling of multiple open-top BVOCs in the field. Therefore, an open-top air chamber fumigation system for woody plants has been developed. An off-line sampling and analysis method for BVOCs has been established. Fumigation experiments of populus canadensis isoprene emissions under different ozone concentrations have been carried out. The following main research results have been obtained: |
Pages | 74 |
Language | 中文 |
Document Type | 学位论文 |
Identifier | http://ir.rcees.ac.cn/handle/311016/42310 |
Collection | 大气环境科学实验室 |
Recommended Citation GB/T 7714 | 王玉征. 开顶式气室的研制及其在 研究 臭氧影响加杨排放异戊二烯中的应用[D]. 北京. 中国科学院生态环境研究中心,2019. |
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