| DOI: | 10.2172/1315486
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| 报告号: | DOE/SC-ARM--16-047
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| 报告题名: | Two-Column Aerosol Project: Aerosol Light Extinction Measurements Field Campaign Report |
| 作者: | Dubey, Manvendra; Aiken, Allison; Berg, Larry K.; Freedman, Andrew; Gorkowski, Kyle
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| 出版年: | 2016
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| 发表日期: | 2016-09-01
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| 总页数: | 8
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| 国家: | 美国
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| 语种: | 英语
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| 英文关键词: | Two-Column Aerosol Project
; aerosols
; photoacoustic soot spectrometer
|
| 中文主题词: | 气溶胶
; 大气辐射
; 吸收
; 吸附作用
|
| 主题词: | AEROSOLS
; ATMOSPHERIC RADIATION
; ABSORPTION
|
| 英文摘要: | We deployed Aerodyne Research Inc.âs first Cavity Attenuated Phase Shift extinction (CAPS PMex) monitor (built by Aerodyne) that measures light extinction by using a visible-light-emitting diode (LED) as a light source, a sample cell incorporating two high-reflectivity mirrors centered at the wavelength of the LED, and a vacuum photodiode detector in Cape Cod in 2012/13 for the U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Climate Research Facilityâs Two-Column Aerosol Project (TCAP). The efficacy of this instrument is based on the fact that aerosols are broadband scatterers and absorbers of light. The input LED is square-wave modulated and passed through the sample cell that distorts it due to exponential decay by aerosol light absorption and scattering; this is measured at the detector. The amount of phase shift of the light at the detector is used to determine the light extinction. This extinction measurement provides an absolute value, requiring no calibration. The goal was to compare the CAPS performance with direct measurements of absorption with ARMâs baseline photoacoustic soot spectrometer (PASS-3) and nephelometer instruments to evaluate its performance. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1315486
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/42021
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1315486.pdf（421KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Dubey, Manvendra,Aiken, Allison,Berg, Larry K.,et al. Two-Column Aerosol Project: Aerosol Light Extinction Measurements Field Campaign Report. 2016-01-01.
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