Tropospheric Organic Matter: Characterization of OxygenatedCompounds of Biogenic Versus Thermogenic Origins

该笔拨款提供以下化验分析： 空气中的细颗粒物收集在不同区域的 世界各地的代表性特征 植被群落 作为对秘书长先前工作的补充， 同一个研究者，其中烃类是主要的 实验室分析的对象，本项目将 强调分析含氧物种在 同样的样本在早期野外保存了10年， 取样操作。 这项研究的一个重要内容是， 是识别"化学特征"， 天然释放的植物蜡的组合物 植物群落的植被特征 世界各地的区域范围。 包括一些样品 代表人为和自然燃烧源。 这项研究将进一步定义有机化学， 对流层中的空气颗粒物， 提供已知颗粒物的化学数据， 用于追踪大气迁移的区域来源 途径。

The grant provides for the laboratory analysis of airborne fine particles collected in different regions of the world at locations representative of characteristic vegetational communities. Complementing earlier work by the same investigator in which hydrocarbon types were the prime object of the laboratory analyses, the current project will emphasize the analysis of the oxygen-bearing species in the same samples stored up to ten years following earlier field- sampling operations. An important element of the research is the identification of "chemical signatures" in terms of the composition of plant waxes naturally released from the vegetation of plant communities characterizing areas of regional extent around the world. Some samples are included to represent both anthropogenic and natural combustion sources. The research will further define the organic chemistry of airborne particulate matter in the troposphere, and it will provide data on the chemistry of particulates from known regional origins for use in tracing atmospheric transport pathways.