| 项目编号: | 1523500
|
| 项目名称: | Quantifying the Effect of Vapor Wall Deposition on Chamber-Derived Yields of Secondary Organic Aerosol |
| 作者: | John Seinfeld
|
| 承担单位: | California Institute of Technology
|
| 批准年: | 2014
|
| 开始日期: | 2015-07-15
|
| 结束日期: | 2018-06-30
|
| 资助金额: | USD524889
|
| 资助来源: | US-NSF
|
| 项目类别: | Standard Grant
|
| 国家: | US
|
| 语种: | 英语
|
| 特色学科分类: | Geosciences - Atmospheric and Geospace Sciences
|
| 英文关键词: | environmental chamber
; soa yield
; wall deposition rate
; particle deposition
; chamber vapor dynamics
; chamber experiment
; aerosol-induced health effect
; vapor wall deposition
; chamber wall
; individual organic species
; anthropogenic volatile organic compound
; historical chamber experiment
; teflon wall
; secondary organic aerosol
; ambient aerosol concentration
; vapor transport
|
| 英文摘要: | This research is focused on the study of secondary organic aerosol (SOA), very small particles condensed from the gas phase, in environmental chambers and the effects of gas and particle deposition onto the chamber walls. Modeling studies generally utilize fundamental data from environmental chambers in predicting ambient aerosol concentrations in the atmosphere. Currently a discrepancy exists between model predictions and atmospheric measurements of SOA. The reanalysis of historical chamber experiments indicates that prior reported SOA yields may have been underpredicted. The information from this research is critical for understanding aerosol-induced health effects and contributions to global aerosol radiative forcing.
The proposed work includes: (1) Measurements of the wall deposition rates of individual organic species on the Teflon walls of a chamber and correlation of those rates to molecular properties of the species; (2) Chamber experiments with a wide range of important biogenic and anthropogenic volatile organic compounds in which the competition between vapor transport to particles and the walls is modulated; and (3) Development of a comprehensive model of chamber vapor dynamics that allows quantitative assessment from data on individual species of the impact of vapor wall deposition and extrapolation to atmospheric "wall-less" conditions. |
| 资源类型: | 项目
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94012
|
| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
|
|
There are no files associated with this item.
|
| Recommended Citation: | |
John Seinfeld. Quantifying the Effect of Vapor Wall Deposition on Chamber-Derived Yields of Secondary Organic Aerosol. 2014-01-01.
|
|
|