Leaf Senescence and Frost Damage--New Sources of Reactive Volatile Organic Compounds (VOCs)

该项目将支持测量叶片衰老和霜冻损害条件下植物的挥发性有机化合物（VOCs）。化合物包括己烯醛、己醛、戊烯醇和其他C5和C6挥发性化合物。实地测量将于秋季在密歇根州的PROPOHET（氧化剂研究计划：光化学、排放和运输）站点进行。辅助测量将可用来确定气团的起源等。这些测量将与奥地利因斯布鲁克大学合作，使用在线质子转移反应/质谱（PTR-MS），以及与NCAR合作的吸附筒和GC/MS（气相色谱/质谱）进行。一种新开发的放松涡流蓄能器（REA）筒式采样器将用于通量测量。这项工作将增强我们对植物释放的有机化合物对对流层光化学和空气质量的贡献的理解。

This project will support measurements of VOCs (volatile organic compounds) from plants under conditions of leaf senescence and frost damage. Compounds include hexenals, hexanal, pentenols, and other C5 and C6 VOCs. The field measurements will be carried out at the PROPOHET (Program for Research on Oxidants: Photochemistry, Emissions, and Transport) site in Michigan during the fall. Ancillary measurements will be available to determine air mass origin etc. These measurements will be carried out using on-line proton transfer reaction/mass spectrometry (PTR-MS) in collaboration with the University of Innsbruck, Austria, and adsorbent cartridges and GC/MS (gas chromatography/mass spectrometry), in collaboration with NCAR. A recently developed relaxed eddy accumulator (REA) cartridge sampler will be used for flux measurements. This work will enhance our understanding of the contribution to tropospheric photochemistry and air quality of organic compounds emitted from plants.