| 项目编号: | 1446286
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| 项目名称: | The Effect of Particle Phase State on Multiphase Hydroxyl Radical (OH) Oxidation Kinetics and Products of Biomass Burning Aerosol |
| 作者: | Daniel Knopf
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| 承担单位: | SUNY at Stony Brook
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| 批准年: | 2014
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| 开始日期: | 2015-07-01
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| 结束日期: | 2018-06-30
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| 资助金额: | USD321512
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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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: | bba
; biomass
; aerosol
; atmosphere
; phase change
; hydroxyl radical
; organic aerosol particle
; organic aerosol
; indirect effect
; bba particle
; human health effect
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| 英文摘要: | Biomass burning aerosols (BBA) are ubiquitous throughout the global atmosphere. BBA source strength is believed to be of similar magnitude to the fossil fuel burning aerosols. Biomass burning plumes can affect the atmosphere on local to global scales, and BBAs can have a significant impact on visibility, and on the radiative forcing due to the direct scattering and absorption of radiation. By altering the properties of clouds, BBA also exert indirect effects on the radiation balance. Organic aerosols, representing a major mass fraction of the submicron size fraction, are implicated in human health effects. During atmospheric transport, organic aerosol particles are chemically transformed due to reactions with trace oxidizing species such as the hydroxyl radical (OH), resulting in chemical aging and ultimately cleansing of the atmosphere.
The chemical aging of BBA particles by reactive trace gas species is not well understood, and so far investigations have been limited mostly to room temperature and dry conditions, although most of the atmosphere exhibits oxidizing conditions at lower temperatures and wider variations in relative humidity. Ambient environmental parameters, which induce altered viscosity or even phase changes, are responsible for altered chemical reactivity in BBA, and may in turn be responsible for altering the kinetics of many of these chemical transformations.
A series of laboratory based investigations, using proxy and surrogate compounds under controlled conditions, are to be carried out in order to further describe the chemical transformations taking place during the formation, dispersal and aging of natural, biomass burning aerosols |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94238
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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: | |
Daniel Knopf. The Effect of Particle Phase State on Multiphase Hydroxyl Radical (OH) Oxidation Kinetics and Products of Biomass Burning Aerosol. 2014-01-01.
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