Tropospheric Chemistry of Isoprene, Monoterpenes and Their Atmospheric Reaction Products

在这个为期三年的计划中，将对从植物排放到大气中的选定有机化合物的大气化学进行实验研究。 在区域和全球尺度上，将对来自植被的非甲烷有机化合物的排放进行实验研究。 在区域和全球范围内，主要由异戊二烯（2-甲基-1，3-丁二烯）和C10 H16单萜组成的植被非甲烷有机化合物的排放量相当于或超过人为来源的非甲烷有机化合物的排放量。 行星边界层的化学成分很可能是由这些生物排放物控制的。 此外，植物排放的异戊二烯和单萜与臭氧的形成和农村和城市地区光化学空气污染的其他表现形式有关。 由于异戊二烯和单萜与羟基（NO_3）自由基和臭氧（O_3）的气相反应速率常数已经确定，本项目将重点研究OH自由基、NO_3自由基和O_3与这些生物有机物反应生成的产物及其反应机理。 确定和量化OH自由基、NO3自由基和O的气相反应产物的实验

During this three-year program, the atmospheric chemistry of selected organic compounds emitted into the atmosphte from vegetation will be experimentally investigated. On regional and global scales, the emissions of non-methane organic compounds from vegetation will be expermentally investigated. On regional and global scales, the emissions of non-methane organic compounds from vegetation, which are largely comprised of isoprene (2-methyl-1,3- butadiene and C10H16 monoterpenes, are comparable to or exceed the emissions of non-methane organic compounds from anthropogenic sources. The chemistry of the planetary boundary layer may well be dominated by these biogenic emissions. Additionally, the emissions of isoprene and monoterpenes from vegetation have been implicated in the formation of ozone and other manifestations of photochemical air pollutiion in rural and urban areas. Sine the rate constants fro the atmosphereically-important gas-phase reactions of isoprene and the monoterpenes with hydrozyl (NO3) radicals and ozone (O3) are now reliably known, this project will focus on the products formed from the OH radical, NO3 radical and O3 reactions with these biogenic organic compounds and the elecidation of the reaction mechanisms. Experiments to identify and quantify the products of the gas-phase reactions of OH radicals, NO3 radicals and O