Effects of Defoliation on Isoprene Emissions from Oaks

9652658落叶对橡树异戊二烯排放的琼斯效应植物排放的异戊二烯是低层大气中最重要的自然产生的挥发性有机化合物，因为它是控制大气中一氧化碳、臭氧和甲烷浓度的主要因素。了解是什么控制了植物的异戊二烯排放，对于改进用于研究全球气候变化的大气化学模型至关重要。该项目探索了一种新的、潜在的对工厂异戊二烯排放的主要控制。初步研究表明，橡树的部分落叶导致剩余树叶中异戊二烯排放量意外增加。橡树是美国东部主要的异戊二烯排放者，定期受到一种引入的森林害虫吉普赛飞蛾的大规模、大范围落叶的影响。该项目将研究落叶对橡树异戊二烯排放的影响，利用这些信息来改进现有的预测植物异戊二烯排放的模型。

9652658 Jones Effects of Defoliation on Isoprene Emissions from Oaks Isoprene emitted by plants is the single most important naturally occurring volatile organic compound in the lower atmosphere, because it is a major control on atmospheric concentrations of carbon monoxide, ozone and methane. Understanding what controls isoprene emissions from plants is critical for improving models of atmospheric chemistry that are used in studying global climate change. This project explores a new, potentially major control over isoprene emissions from plants. Preliminary studies showed that partial defoliation of oaks resulted in an unexpected increase in isoprene emissions from remaining leaves. Oaks are the major isoprene-emitters in the eastern U.S., and are periodically subjected to massive, wide-scale defoliation by an introduced forest insect pest, the Gypsy Moth. This project will study the effects of defoliation on isoprene emissions from oaks, using the information to improve existing models that predict isoprene emissions from plants.