Effects of Defoliation on Isoprene Emissions from Oaks

落叶对橡树异戊二烯排放的影响

• 批准号: 9652658
• 负责人: Clive Jones
• 金额: $ 10.5万
• 依托单位: Cary Institute of Ecosystem Studies, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-03-01 至 1999-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9652658&HistoricalAwards=false
• 关键词: Effects; Defoliation; Isoprene; Emissions; Oaks

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.

小行星9652658 去叶对橡树异戊二烯排放的影响 植物排放的异戊二烯是低层大气中唯一最重要的自然挥发性有机化合物，因为它是一氧化碳、臭氧和甲烷大气浓度的主要控制因素。 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、潜在的主要控制植物异戊二烯排放的方法。 初步研究表明，橡树的部分落叶导致剩余叶子的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源，并且 周期性地受到大量的，大规模的落叶由引进的森林害虫，吉普赛蛾。 该项目将研究落叶对橡树异戊二烯排放的影响，利用这些信息改进预测植物异戊二烯排放的现有模型。