Collaborative Research: Ultra Fine Particle Deposition onto Vegetated Surfaces Situated on Complex Topography: From Leaf to Landscape

植被表面产生并可以作为超细颗粒（UFP）的汇，可以影响当地气候和空气质量。这项工作研究了在现实条件下的森林冠层与UFP的相互作用，以开发方法来预测森林的功效作为UFP汇。这些发现揭示了植被如何影响生态系统服务、气候和空气质量。它还提供了机会，以清除城市地区快速增长的纳米颗粒产品造成的污染。森林产生的颗粒在大气的辐射平衡和组成中发挥着重要但不为人所知的作用。该提案的重点是量化的超细粒子（UFP）通量的植被冠层，是由复杂的动力学和反应过程控制的第一原则。 他们的放大方法解决了（1）叶形态的影响（2）冠层内和景观尺度上的流动和（3）大尺度地形的影响。 该项目将在一系列尺度上使用实验室和田间实验来了解基本问题，例如（1）树叶的大小，形状和结构如何影响UFP收集？(2)UFP的沉积速度在冠层内是如何变化的？(3)我们能可靠地放大这些UFP通量的复杂地形？该项目应能够开发下一代冠层模型，以处理生态系统和大气之间的耦合和化学反馈。

Vegetated surfaces produce and can serve as a sink for ultrafine particles (UFP) that can affect local climate and air-quality. This work examines the interaction of the forest canopy with the UFP under realistic conditions to develop methods to predict the efficacy of forests as UFP sinks. The findings inform how vegetation effects ecosystem services, climate and air quality. It also provide and opportunity to scrub pollution from rapidly growing nano-particle products in urban areas.Forests produce particles that play an important but ill-understood role in the radiative balance and composition of the atmosphere. The proposal focuses on the quantification of Ultra-fine particles (UFP) fluxes from vegetation canopies that are controlled by complex dynamical and reactive processes using first principles. Their up scaling method resolves (1) the effects of leaf morphology (2) flows within the a canopy and on landscape scales and (3) effects of large scale topography. The project will use laboratory and field experiments over a range of scales to understand fundamental questions such as (1) How does foliage size, shape and structure impact UFP collection? (2) How does the UFP deposition velocity vary within the canopy? (3) Can we reliably upscale these UFP fluxes for complex topography? This project should enable the development of next generation canopy models to treat couplings and chemical feedbacks between ecosystems and the atmosphere.