SGER: Atmosphere-Canopy Interactions Following Hurricane Disturbance in a Montane Forest in Puerto Rico

SGER：波多黎各山地森林飓风扰动后的大气与树冠相互作用

• 批准号: 9014956
• 负责人: Gary Lovett
• 金额: $ 4.99万
• 依托单位: New York Botanical Garden
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-06-01 至 1992-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9014956&HistoricalAwards=false
• 关键词: SGER; Atmosphere; Canopy; Interactions; Following

The defoliation of montane cloud forest in Puerto Rico by a recent hurricane offers an opportunity to investigate the influence of canopy structure on the deposition of material from the atmosphere and the chemical processing of that material before it reaches the forest floor. Drs. Lovett and Asbury hypothesize that: 1. As the canopy recovers, cloud water deposition will first increase in response to increasing surfaces for deposition, and then decrease as the canopy becomes dense enough to limit penetration of wind and cloud droplets. 2. The canopy will take up NO3-, NH4+, and H+ and release all other ions. The amount of uptake or release will increase rapidly in the initial stages of recovery and then level off at higher levels of canopy surface areas. 3. Because of the abundance of chemically active epiphytes on boles and branches, stemflow chemistry will change more than throughfall chemistry as the canopy recovers. This innovative research takes advantage of a natural catastrophe to investigate the properties of forest canopy- atmosphere interaction. This is an important area of research for global change and atmospheric deposition. Drs. Lovett and Asbury are highly qualified investigators who have experience with sampling and modeling canopy-atmosphere interactions.

在波多黎各， 最近的飓风提供了一个机会， 冠层结构对大气中物质沉积的影响 大气和材料的化学处理 在它到达森林地面之前。 洛维特和阿斯伯里医生 假设：1.随着树冠层的恢复，云水 沉积将首先响应于增加的表面而增加 然后随着林冠变得密集而减少 足以限制风和云滴的渗透。 2.的 林冠将吸收NO3-、NH 4+和H+，并释放所有其他 离子。 吸收或释放的量将迅速增加 恢复的初始阶段，然后在较高的 林冠表面积的水平。 3.由于大量的 树干和树枝上的化学活性附生植物，茎流 化学变化将超过穿透水化学， 冠层恢复。 这项创新的研究利用了一种自然的 调查森林冠层的性质- 大气相互作用 这是一个重要的研究领域 全球变化和大气沉降的影响。 洛维特医生和 阿斯伯里是高素质的调查员， 进行采样和模拟冠层与大气的相互作用。