| 项目编号: | 1464458
|
| 项目名称: | EAGER: Quantifying Reversible and Irreversible Aqueous Secondary Organic Aerosol (SOA) Formation in the Atmosphere |
| 作者: | Christopher Hennigan
|
| 承担单位: | University of Maryland Baltimore County
|
| 批准年: | 2013
|
| 开始日期: | 2014-12-01
|
| 结束日期: | 2015-11-30
|
| 资助金额: | USD99426
|
| 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: | soa
; atmosphere
; water soluble soa transformation
; soluble organic gas
; source secondary organic aerosol
; aqueous aerosol
; soa concentration
; soa formation
; eager criterion
; soa formation pathway
; ambient aerosol
|
| 英文摘要: | The project will examine the seasonal composition of ambient aerosols at an urban site in Maryland to better understand the contribution of aqueous-phase reactions occurring in aerosols as a source secondary organic aerosol (SOA). SOA, in contrast to gas-to-particle conversion, constitutes a major fraction of fine (PM2.5um) particle mass in the atmosphere. However, an under-prediction of SOA concentrations by state-of-the-art models indicates that a mechanistic understanding of SOA formation pathways is lacking. The uptake and reaction of soluble organic gases in aqueous aerosols is argued to be an important source of SOA formation that traditional models have neglected.
SOA constitutes a major fraction of fine (PM2.5um) particle mass in the atmosphere, and impacts atmospheric visibility, radiation balance, and also human health. This investigation meets the EAGER criteria because a key part of the analytical work (i.e. fast switching of a tandem PILS ? particle into liquid sampler) the proposal depends upon is exploratory in nature, and the approach largely untested. If successful, this would also provide the foundation for a broader, more comprehensive definition of the composition and the reactivity of water soluble SOA transformation. |
| 资源类型: | 项目
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95344
|
| 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: | |
Christopher Hennigan. EAGER: Quantifying Reversible and Irreversible Aqueous Secondary Organic Aerosol (SOA) Formation in the Atmosphere. 2013-01-01.
|
|
|