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

最近的一次飓风使波多黎各的山地云雾森林落叶，这为研究树冠结构对大气中物质沉积的影响以及这些物质在到达森林地面之前的化学处理提供了机会。洛维特和阿斯伯里博士假设：1.随着树冠的恢复，云水沉积将首先随着沉积表面的增加而增加，然后随着树冠变得足够致密以限制风和云滴的穿透而减少。2.冠层吸收NO_3~-、NH_4~+和H~+，释放其他离子。在恢复的最初阶段，吸收或释放的量将迅速增加，然后在较高的冠层表面积水平上趋于平稳。3.由于树干和树枝上有丰富的化学活性附生植物，随着树冠的恢复，树干茎流化学的变化比穿透雨化学的变化更大。这项创新性的研究利用一次自然灾害来研究森林树冠-大气相互作用的特性。这是全球变化和大气沉积研究的一个重要领域。洛维特博士和阿斯伯里博士都是非常合格的研究人员，他们在采样和建模树冠-大气相互作用方面有经验。

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.