Tropospheric Chemistry of Isoprene and Monoterpenes

在区域和全球范围内， 来自植物的有机化合物，主要由异戊二烯组成 和单萜类化合物，相当于或超过 人为来源的非甲烷有机化合物。 期间 在这个为期三年的实验计划中，PI将确定并 使用大气压电离串联质谱进行定量 傅里叶变换红外光谱法 吸收光谱、气相色谱和混合气体 通过色谱-质谱法， 异戊二烯气相反应产生的对流层条件 以及一系列具有OH和NO3自由基和O3的单萜。 从本研究中获得的产品和机械数据 该计划将提供必要的信息， 对流层降解反应方案的制定 这些化合物的生物来源。 某些产品 所形成的物质可以作为“标记”化合物， 排放的有机化合物在大气中的转化 植被 因此，PI还将进行选定的 在精心挑选的地点进行环境空气研究， 这些大气转化产物是否 存在于环境大气中。

On regional and global scales, the emissions of non-methane organic compounds from vegetation, mainly comprised of isoprene and monoterpenes, are comparable to or exceed the emissions of non-methane organic compounds from anthropogenic sources. During this three-year experimental program, the PIs will identify and quantify, using atmospheric pressure ionization tandem mass spectrometry in conjunction with Fourier transform infrared absorption spectroscopy, gas chromatography and combined gas chromatography-mass spectrometry, the products formed under tropospheric conditions from the gas-phase reactions of isoprene and a series of monoterpenes with OH and NO3 radicals and O3. The product and mechanistic data obtained from this research program will provide the information necessary for the formulation of reaction schemes for the tropospheric degradations of these compounds of biogenic origin. Certain of the product species formed may serve as "marker" compounds for the atmospheric transformations of organic compounds emitted by vegetation. Accordingly, the PIs will also conduct selected ambient air studies in carefully chosen locations to investigate whether or not these atmospheric transformation products are present in the ambient atmosphere.