| 项目编号: | 1331360
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| 项目名称: | AGS-PRF: Synthesizing Laboratory and Field Measurements of Biogenic Volatile Organic Compounds |
| 作者: | Tran Nguyen
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| 承担单位: | Nguyen Tran B
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| 批准年: | 2013
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| 开始日期: | 2014-01-01
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| 结束日期: | 2015-12-31
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| 资助金额: | USD172000
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| 资助来源: | US-NSF
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| 项目类别: | Fellowship
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Atmospheric and Geospace Sciences
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| 英文关键词: | laboratory study
; secondary organic aerosol
; field campaign
; organic compound
; isoprene
; ags postdoctoral research fellowship program
; isoprene-derived organic compound
; soas field campaign
; ags postdoctoral research fellow
; research
; multifunctional organic compound
|
| 英文摘要: | This objective of this research is to investigate the major chemical and physical loss pathways for isoprene (C5H8) and its oxidation products in the atmosphere and assess their role in the formation of secondary organic aerosol (SOA). An AGS Postdoctoral Research Fellow will conduct laboratory studies in Caltech's newly built smog chambers to explore potential mechanisms for SOA formation under various conditions. The three primary mechanisms that will be investigated are: (1) the gas-phase OH-oxidation of isoprene-derived epoxydiols (IEPOX), that are formed in pristine environments, in the presence of varying amounts of NOx, (2) the reactive uptake and aqueous photochemistry of isoprene-derived organic compounds (hydroperoxide (ISOPOOH), IEPOX, glycolaldehyde, etc.) in aerosol liquid water, and (3) the formation of hydroperoxides from the water vapor reaction with stabilized Criegee intermediates from the ozonolysis of isoprene.
Multifunctional organic compounds that are important precursors to SOA were measured during an NSF sponsored field campaign in the summer of 2013, the Southern Oxidant and Aerosol Study (SOAS), using a state-of-the-art chemical ionization mass spectrometer (CIMS). Results from the laboratory studies will be used to assess possible mechanisms for SOA formation that might explain the observational data collected during the SOAS field campaign.
Isoprene is emitted by forests and plants and is among the most highly emitted organic compounds in the atmosphere. The products of isoprene oxidation form ozone and secondary organic aerosols, which are harmful to human health and perturb the Earth's climate. This research will produce information that is critical to modeling the influence of isoprene oxidation products on climate change.
This research is supported under the AGS Postdoctoral Research Fellowship program. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/97443
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Tran Nguyen. AGS-PRF: Synthesizing Laboratory and Field Measurements of Biogenic Volatile Organic Compounds. 2013-01-01.
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