Optical Calibration and Equivalence of a Multiwavelength Thermal/Optical Carbon Analyzer
Chow, Judith C.1,2,3; Wang, Xiaoliang1,3; Sumlin, Benjamin J.1; Gronstal, Steven B.1; Chen, L. -W. Antony1,4; Trimble, Dana L.1; Kohl, Steven D.1; Mayorga, Sierra R.1; Riggio, Gustavo1; Hurbain, Patrick R.1; Johnson, Megan1; Zimmermann, Ralf5; Watson, John G.1,2,3
2015-08-01
发表期刊AEROSOL AND AIR QUALITY RESEARCH
ISSN1680-8584
卷号15期号:4页码:1145-+
文章类型Article
摘要

Organic and elemental carbon (OC and EC) are operationally-defined by the measurement process, so long-term trends may be interrupted with instrumentation changes. A modification to the U.S. IMPROVE carbon analysis protocol and hardware is examined that replaces the 633 nm laser light used for OC charring adjustments with seven wavelengths ranging from 405 to 980 nm, including one at 635 nm. Reflectance (R) and Transmittance (T) values for each wavelength are made traceable to primary standards through transfer standards consisting of a range of aerosol deposits on filter media similar to that of the analyzed samples. R and T values are assigned to these filters using a UV/VIS spectrometer calibrated with these standards. Using ambient and source (e.g., diesel exhaust, flaming biomass, and smoldering biomass) samples, it is demonstrated that R and T calibration is independent of the sample type. Total carbon (TC), OC, and EC comparisons with the earlier hardware design for urban- and non-urban samples demonstrate equivalence, within precisions derived from replicate analyses, for the 633 nm and 635 nm wavelengths. Several uses of the additional multiwavelength information are identified, including: 1) ground-truthing of multi-spectral remote sensors; 2) improving estimates of the Earth's radiation balance; 3) associating specific organic compounds with their light absorption properties; and 4) appropriating sources of black and brown carbon.

关键词Brown Carbon Multiwavelength Aerosol Light Absorption Angstrom Absorption Exponent
WOS标题词Science & Technology ; Life Sciences & Biomedicine
DOI10.4209/aaqr.2015.02.0106
关键词[WOS]Aerosol Light-absorption ; Air-quality Measurements ; Black Carbon ; Elemental Carbon ; Source Apportionment ; Particulate Matter ; Fresno Supersite ; Fine Particles ; United-states ; Brown Carbon
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology
WOS类目Environmental Sciences
WOS记录号WOS:000358999400001
出版者TAIWAN ASSOC AEROSOL RES-TAAR
引用统计
被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9280
专题黄土与第四纪地质国家重点实验室(2010~)
通讯作者Chow, Judith C.
作者单位1.Desert Res Inst, Div Atmospher Sci, Reno, NV 89512 USA
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Shaanxi, Peoples R China
3.Univ Nevada, Grad Fac, Reno, NV 89503 USA
4.Univ Nevada, Dept Environm & Occupat Hlth, Las Vegas, NV 89154 USA
5.Univ Rostock, Joint Mass Spectrometry Ctr, Chair Analyt Chem, Inst Chem, D-18055 Rostock, Germany
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Chow, Judith C.,Wang, Xiaoliang,Sumlin, Benjamin J.,et al. Optical Calibration and Equivalence of a Multiwavelength Thermal/Optical Carbon Analyzer[J]. AEROSOL AND AIR QUALITY RESEARCH,2015,15(4):1145-+.
APA Chow, Judith C..,Wang, Xiaoliang.,Sumlin, Benjamin J..,Gronstal, Steven B..,Chen, L. -W. Antony.,...&Watson, John G..(2015).Optical Calibration and Equivalence of a Multiwavelength Thermal/Optical Carbon Analyzer.AEROSOL AND AIR QUALITY RESEARCH,15(4),1145-+.
MLA Chow, Judith C.,et al."Optical Calibration and Equivalence of a Multiwavelength Thermal/Optical Carbon Analyzer".AEROSOL AND AIR QUALITY RESEARCH 15.4(2015):1145-+.
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