Two-Column Aerosol Project: Aerosol Light Extinction Measurements Field Campaign Report

doi:10.2172/1315486

GSTDTAP > 地球科学

DOI	10.2172/1315486
报告编号	DOE/SC-ARM--16-047
来源ID	OSTI ID: 1315486
	Two-Column Aerosol Project: Aerosol Light Extinction Measurements Field Campaign Report
	Dubey, Manvendra; Aiken, Allison; Berg, Larry K.; Freedman, Andrew; Gorkowski, Kyle
	2016-09-01
出版年	2016
页数	8
语种	英语
国家	美国
出版者	DOE ARM Climate Research Facility, Pacific Northwest National Laboratory, Richland, WA
领域	地球科学
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.
英文关键词	Two-Column Aerosol Project aerosols photoacoustic soot spectrometer
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/7409
专题	地球科学
推荐引用方式 GB/T 7714	Dubey, Manvendra,Aiken, Allison,Berg, Larry K.,et al. Two-Column Aerosol Project: Aerosol Light Extinction Measurements Field Campaign Report:DOE ARM Climate Research Facility, Pacific Northwest National Laboratory, Richland, WA,2016.