使用拉格朗日框架对挥发性化学产品排放的自上而下评估
Bert W D Verreyken1, Colin Harkins1,2, Meng Li1,2
1NOAA Chemical Sciences Laboratory, 325, Boulder, Colorado 80304, United States.
Environmental science & technology
|April 3, 2025
概括
包括建筑和消费品在内的挥发性化学产品排放被使用先进的建模和追踪器来评估. 在洛杉矶盆地,建筑业的排放量被低估了5.3倍.
科学领域:
- 大气化学 大气化学
- 环境科学 环境科学
- 空气质量建模空气质量模型
背景情况:
- 挥发性化学产品 (VCPs) 对城市空气质量作出了重大贡献.
- 准确的排放清单对于了解和减轻空气污染至关重要.
研究的目的:
- 评估和优化来自麦当劳等公司的VCP排放量. 使用特定行业的追踪器和分散模型进行库存.
- 评估洛杉矶盆地个人护理产品,杀虫剂和建筑子部门的排放.
主要方法:
- 使用了FLEXPART-WRF拉格朗的粒子分散模型,使用了D5-Siloxane,PDCBZ和PCBTF等标记物.
- 从2021年夏天开始,从地面和机场进行综合连续地面和现场基于飞机的观测.
- 优化天气研究和预报 (WRF) 模型配置,使用PUMAS垂直风形状测量.
主要成果:
- 优化时间排放概况,减少个人护理产品和杀虫剂的日间振幅.
- 建筑VCP (涂料+粘合剂) 的日间振幅增强.
- 飞机反转显示,洛杉矶盆地建筑排放量被低估了五倍.
结论:
- 该研究强调了洛杉矶库存中建筑物VCP排放的严重低估.
- 确定了消费品和杀虫剂的优化排放因子.
- 采用先进的大气建模技术,用于准确的VCP排放评估.
相关概念视频
Eulerian and Lagrangian Flow Descriptions
933
Fluid flow analysis is critical in many scientific and engineering disciplines, and two principal approaches are used to describe this flow: the Eulerian and Lagrangian methods. These methods offer different perspectives on monitoring and analyzing the motion of fluids, each with distinct advantages depending on the scenario.
The Eulerian method focuses on fixed points in space where fluid properties, such as velocity, pressure, and temperature, are observed as the fluid moves between these...
The Eulerian method focuses on fixed points in space where fluid properties, such as velocity, pressure, and temperature, are observed as the fluid moves between these...
933
Volatilization
328
Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
328


