IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
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
Source PublicationAEROSOL AND AIR QUALITY RESEARCH
ISSN1680-8584
Volume15Issue:4Pages:1145-+
SubtypeArticle
Abstract

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.

KeywordBrown Carbon Multiwavelength Aerosol Light Absorption Angstrom Absorption Exponent
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.4209/aaqr.2015.02.0106
WOS KeywordAerosol Light-absorption ; Air-quality Measurements ; Black Carbon ; Elemental Carbon ; Source Apportionment ; Particulate Matter ; Fresno Supersite ; Fine Particles ; United-states ; Brown Carbon
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000358999400001
PublisherTAIWAN ASSOC AEROSOL RES-TAAR
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9280
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorChow, Judith C.
Affiliation1.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
Recommended Citation
GB/T 7714
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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