| 项目编号: | 1343077
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| 项目名称: | The Influence of Halogen-Containing Oxidants in Sulfate Aerosol Formation in the Marine Boundary Layer |
| 作者: | Becky Alexander
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| 承担单位: | University of Washington
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| 批准年: | 2013
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| 开始日期: | 2014-04-01
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| 结束日期: | 2018-03-31
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| 资助金额: | USD448302
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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: | sulfate
; sulfate formation
; cloud-aerosol chemistry
; marine boundary layer
; atmospheric aerosol
; sulfate aerosol formation
; new aerosol
; remote marine boundary layer
; halogen-containing oxidant
; oxygen
; aerosol filter sample
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| 英文摘要: | This research will test the hypothesis that halogen-containing oxidants (such as HOBr) play a significant role in sulfate aerosol formation in the marine boundary layer. Because HOBr and HOCl transfer unique isotopic signatures of oxygen to their oxidation products, the oxygen isotopic composition of the measured sulfate reflects the relative importance of the different mechanisms of oxidation. Measurements of Delta(17)Oxygen in sulfate, a value dependent only on the oxidation pathway of SO2 to sulfate, will be made on aerosol filter samples previously collected from nearly every major ocean basin. The global chemical transport model GEOS-Chem will be run for the days that the filter samples were collected. The modeled data for Delta(17)Oxygen will be compared with observations to provide constraints on the relative importance of hypohalous acid (HOX) in sulfate formation at each location.
The results of this effort are important for understanding sulfate formation in the remote marine boundary layer. Sulfate is a major component of atmospheric aerosol and is especially important in the formation of new aerosol. This research is highly relevant for gaining a better understanding of cloud-aerosol chemistry and climate change. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/97215
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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: | |
Becky Alexander. The Influence of Halogen-Containing Oxidants in Sulfate Aerosol Formation in the Marine Boundary Layer. 2013-01-01.
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