Sesquiterpene Emissions from Natural, Urban and Agricultural Vegetation in the United States

美国自然、城市和农业植被的倍半萜排放量

• 批准号: 0304704
• 负责人: Detlev Helmig
• 金额: $ 22.92万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-15 至 2006-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0304704&HistoricalAwards=false
• 关键词: Sesquiterpene; Emissions; Natural; Urban; Agricultural

The goal of this project is to apply quantitative techniques to measure emissions of sesquiterpenes from trees and agricultural plants. Sesquiterpenes are biogenic volatile organic compounds (BVOCs) that are chemically reactive and have low volatility. Their oxidation products are considered responsible for a significant fraction of the secondary organic aerosols (SOAs), especially over forested regions. A systematic investigation of speciated and total sesquiterpene emission factors will be conducted. Vegetation will be surveyed by environmentally controlled enclosure experiments (leaf cuvette and branch enclosure). Emission samples will be collected on inorganic solid adsorbents and sesquiterpenes will be identified and quantified in the field by thermal desorption/gas chromatography with mass spectrometry and flame ionization detection.The broader impacts of this project will include close collaboration between research groups at the National Center for Atmospheric Research and the Institute of Alpine and Arctic Research at the University of Colorado, Boulder, the construction of a field instrument for on-site identification and quantification of sesquiterpene fluxes, support for a graduate student and undergraduate students, and various outreach activities.

该项目的目标是应用定量技术来测量树木和农业植物中倍半萜的排放量。倍半萜类化合物是一类化学性质活泼、挥发性低的生物挥发性有机化合物。它们的氧化产物被认为是二次有机气溶胶的重要组成部分，特别是在森林覆盖的地区。将对形态和总倍半萜排放因子进行系统调查。植被将通过环境控制的围栏实验(树叶试管和树枝围栏)进行调查。排放样品将在无机固体吸附剂上收集，倍半萜将在实地通过热解吸/气相色谱-质谱仪和火焰电离检测进行鉴定和量化。该项目的更广泛影响将包括国家大气研究中心和科罗拉多大学博尔德分校阿尔卑斯和北极研究所的研究小组之间的密切合作，建造现场鉴定和定量倍半萜通量的实地仪器，支持研究生和本科生，以及各种外联活动。