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.

植被表面会产生超细颗粒 (UFP)，并可作为超细颗粒 (UFP) 的汇，从而影响当地气候和空气质量。这项工作研究了现实条件下森林冠层与 UFP 的相互作用，以开发预测森林作为 UFP 汇的功效的方法。研究结果揭示了植被如何影响生态系统服务、气候和空气质量。它还提供了消除城市地区快速增长的纳米颗粒产品污染的机会。森林产生的颗粒在大气的辐射平衡和成分中发挥着重要但尚未被理解的作用。该提案的重点是对植被冠层的超细颗粒（UFP）通量进行量化，这些通量由复杂的动态和反应过程使用第一原理控制。他们的放大方法解决了（1）叶子形态的影响（2）树冠内流动和景观尺度的影响以及（3）大尺度地形的影响。该项目将使用各种规模的实验室和现场实验来了解基本问题，例如（1）树叶大小、形状和结构如何影响 UFP 收集？ (2) UFP沉积速度在冠层内如何变化？ (3) 我们能否可靠地升级这些 UFP 通量以适应复杂的地形？该项目应该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。