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

合作研究：复杂地形上植被表面的超细颗粒沉积：从树叶到景观

基本信息

批准号：
1644375
负责人：
Marcelo Chamecki
金额：
$ 25.36万
依托单位：
University of California-Los Angeles
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-03-15 至 2020-02-29
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1644375&HistoricalAwards=false
关键词：
Collaborative Research Ultra Fine Particle

项目摘要

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.

植被表面会产生并可以用作可能影响当地气候和空气质量的超细颗粒（UFP）的水槽。这项工作研究了在现实条件下森林冠层与UFP的相互作用，以开发方法以预测森林作为UFP下沉的功效。这些发现介绍了植被如何影响生态系统服务，气候和空气质量。它还提供了从城市地区快速生长的纳米粒子产品擦洗污染的机会。植物产生的颗粒在大气的辐射平衡和组成中起着重要但不理解的作用。该提案的重点是使用第一原理通过复杂的动力学和反应性过程控制的植被檐篷的超细颗粒（UFP）通量的定量。他们的向上缩放方法解决了（1）叶片形态（2）在A冠层内和景观尺度和（3）大尺度形态的影响的影响。该项目将在一系列尺度上使用实验室和现场实验来了解基本问题，例如（1）叶子的大小，形状和结构如何影响UFP收集？（2）UFP沉积速度在冠层内有何不同？（3）我们可以可靠地高档这些UFP通量以进行复杂的地形吗？该项目应使下一代冠层模型的发展以治疗生态系统与大气之间的耦合和化学反馈。