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

植被覆盖的表面会产生超细颗粒物(UFP)，并可用作超细颗粒物(UFP)的汇，这会影响当地的气候和空气质量。这项工作考察了现实条件下森林冠层与超临界流体的相互作用，以开发预测超临界流体下沉时森林功效的方法。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。它还提供了清除城市地区快速增长的纳米颗粒产品造成的污染的机会。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鲜为人知的作用。该提案的重点是利用第一性原理对由复杂的动力和反应过程控制的植被冠层的超细颗粒(UFP)通量进行量化。他们的放大方法解决了(1)叶片形态的影响，(2)树冠内的流动和对景观尺度的影响，(3)大尺度地形的影响。该项目将使用实验室和现场实验在一系列尺度上了解基本问题，例如(1)树叶的大小、形状和结构如何影响UFP收集？(2)UFP在树冠内的沉积速度如何变化？(3)我们能否可靠地提高这些UFP通量以适应复杂地形？该项目应该能够开发下一代树冠模型，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.