| 项目编号: | 1447056
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| 项目名称: | Constraining the Role of Gas-Phase Organic Oxidation in New-Particle Formation |
| 作者: | Neil Donahue
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| 承担单位: | Carnegie-Mellon University
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| 批准年: | 2014
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| 开始日期: | 2015-03-15
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| 结束日期: | 2018-02-28
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| 资助金额: | USD470302
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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: | facile oxidation
; organic compound
; particle formation step
; cloud formation
; atmospheric new-particle formation
; particle formation
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| 英文摘要: | Atmospheric new-particle formation, cluster growth leading to secondary aerosol (SOA) formation, involves facile oxidation of organic compounds and is being revealed as a complex and challenging topic in atmospheric chemistry. Aerosol-climate interactions are a key source of uncertainty in climate forcing [IPCC], affecting both planetary radiation balances, and climate through direct and indirect changes in cloud formation and their properties. Uncertainty in aerosol radiative forcing terms limits our ability to project climate sensitivity (the global average temperature change caused by a given forcing) from currently observed climate change.
Because of the range of chemical mechanisms occurring in natural atmospheres, chemists may choose to study the oxidation and condensation steps in the controllable environment of a chamber, typically interfaced to a desired set of analytical instruments to enable the progress of particle formation, condensation and growth to be optimally studied. Work under this project is directed towards improving understanding of particle formation steps involving interactions of low volatility hydrocarbons (e.g. terpene - ozone adducts) with sulfuric acid clusters. Graduate students will carry out a series of measurements, along with photochemical modelling, in chambers both at Pittsburgh (CMU), and the European CLOUD (Cosmics Leaving OUtdoor Droplets) atmospheric facility at CERN. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95000
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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: | |
Neil Donahue. Constraining the Role of Gas-Phase Organic Oxidation in New-Particle Formation. 2014-01-01.
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