Relationship between oxidation level and optical properties of secondary organic aerosol
Andrew T. Lambe, Christopher D. Cappa, Paola Massoli, Timothy B. Onasch, Sara D. Forestieri, Alexander T. Martin, Molly J. Cummings, David R. Croasdale, William H. Brune, Douglas R. Worsnop, Paul Davidovits
Meteorology and Atmospheric Science
Institute for Computational and Data Sciences (ICDS)
Brown carbon (BrC), which may include secondary organic aerosol (SOA), can be a significant climate-forcing agent via its optical absorption properties. However, the overall contribution of SOA to BrC remains poorly understood. Here, correlations between oxidation level and optical properties of SOA are examined. SOA was generated in a flow reactor in the absence of NOx by OH oxidation of gas-phase precursors used as surrogates for anthropogenic (naphthalene, tricyclo[5.2.1.02,6]decane), biomass burning (guaiacol), and biogenic (α-pinene) emissions. SOA chemical composition was characterized with a time-of-flight aerosol mass spectrometer. SOA mass-specific absorption cross sections (MAC) and refractive indices were calculated from real-time cavity ring-down photoacoustic spectrometry measurements at 405 and 532 nm and from UV-vis spectrometry measurements of methanol extracts of filter-collected particles (300 to 600 nm). At 405 nm, SOA MAC values and imaginary refractive indices increased with increasing oxidation level and decreased with increasing wavelength, leading to negligible absorption at 532 nm. Real refractive indices of SOA decreased with increasing oxidation level. Comparison with literature studies suggests that under typical polluted conditions the effect of NOx on SOA absorption is small. SOA may contribute significantly to atmospheric BrC, with the magnitude dependent on both precursor type and oxidation level.
Environmental Science and Technology
https://doi.org/10.1021/es401043j
10.1021/es401043j
Dive into the research topics of 'Relationship between oxidation level and optical properties of secondary organic aerosol'. Together they form a unique fingerprint.
Aerosol Chemical Compounds 100%
optical property Earth & Environmental Sciences 96%
Optical Property Chemical Compounds 70%
aerosol Earth & Environmental Sciences 67%
oxidation Earth & Environmental Sciences 63%
brown carbon Earth & Environmental Sciences 39%
refractive index Earth & Environmental Sciences 28%
Lambe, A. T., Cappa, C. D., Massoli, P., Onasch, T. B., Forestieri, S. D., Martin, A. T., Cummings, M. J., Croasdale, D. R., Brune, W. H., Worsnop, D. R., & Davidovits, P. (2013). Relationship between oxidation level and optical properties of secondary organic aerosol. Environmental Science and Technology, 47(12), 6349-6357. https://doi.org/10.1021/es401043j
Lambe, Andrew T. ; Cappa, Christopher D. ; Massoli, Paola et al. / Relationship between oxidation level and optical properties of secondary organic aerosol. In: Environmental Science and Technology. 2013 ; Vol. 47, No. 12. pp. 6349-6357.
@article{208266eb33434531ac4fe0a5d50d1fa0,
title = "Relationship between oxidation level and optical properties of secondary organic aerosol",
abstract = "Brown carbon (BrC), which may include secondary organic aerosol (SOA), can be a significant climate-forcing agent via its optical absorption properties. However, the overall contribution of SOA to BrC remains poorly understood. Here, correlations between oxidation level and optical properties of SOA are examined. SOA was generated in a flow reactor in the absence of NOx by OH oxidation of gas-phase precursors used as surrogates for anthropogenic (naphthalene, tricyclo[5.2.1.02,6]decane), biomass burning (guaiacol), and biogenic (α-pinene) emissions. SOA chemical composition was characterized with a time-of-flight aerosol mass spectrometer. SOA mass-specific absorption cross sections (MAC) and refractive indices were calculated from real-time cavity ring-down photoacoustic spectrometry measurements at 405 and 532 nm and from UV-vis spectrometry measurements of methanol extracts of filter-collected particles (300 to 600 nm). At 405 nm, SOA MAC values and imaginary refractive indices increased with increasing oxidation level and decreased with increasing wavelength, leading to negligible absorption at 532 nm. Real refractive indices of SOA decreased with increasing oxidation level. Comparison with literature studies suggests that under typical polluted conditions the effect of NOx on SOA absorption is small. SOA may contribute significantly to atmospheric BrC, with the magnitude dependent on both precursor type and oxidation level.",
author = "Lambe, {Andrew T.} and Cappa, {Christopher D.} and Paola Massoli and Onasch, {Timothy B.} and Forestieri, {Sara D.} and Martin, {Alexander T.} and Cummings, {Molly J.} and Croasdale, {David R.} and Brune, {William H.} and Worsnop, {Douglas R.} and Paul Davidovits",
doi = "10.1021/es401043j",
journal = "Environmental Science & Technology",
Lambe, AT, Cappa, CD, Massoli, P, Onasch, TB, Forestieri, SD, Martin, AT, Cummings, MJ, Croasdale, DR, Brune, WH, Worsnop, DR & Davidovits, P 2013, 'Relationship between oxidation level and optical properties of secondary organic aerosol', Environmental Science and Technology, vol. 47, no. 12, pp. 6349-6357. https://doi.org/10.1021/es401043j
Relationship between oxidation level and optical properties of secondary organic aerosol. / Lambe, Andrew T.; Cappa, Christopher D.; Massoli, Paola et al.
In: Environmental Science and Technology, Vol. 47, No. 12, 18.06.2013, p. 6349-6357.
T1 - Relationship between oxidation level and optical properties of secondary organic aerosol
AU - Lambe, Andrew T.
AU - Cappa, Christopher D.
AU - Massoli, Paola
AU - Onasch, Timothy B.
AU - Forestieri, Sara D.
AU - Martin, Alexander T.
AU - Cummings, Molly J.
AU - Croasdale, David R.
AU - Brune, William H.
AU - Worsnop, Douglas R.
AU - Davidovits, Paul
N2 - Brown carbon (BrC), which may include secondary organic aerosol (SOA), can be a significant climate-forcing agent via its optical absorption properties. However, the overall contribution of SOA to BrC remains poorly understood. Here, correlations between oxidation level and optical properties of SOA are examined. SOA was generated in a flow reactor in the absence of NOx by OH oxidation of gas-phase precursors used as surrogates for anthropogenic (naphthalene, tricyclo[5.2.1.02,6]decane), biomass burning (guaiacol), and biogenic (α-pinene) emissions. SOA chemical composition was characterized with a time-of-flight aerosol mass spectrometer. SOA mass-specific absorption cross sections (MAC) and refractive indices were calculated from real-time cavity ring-down photoacoustic spectrometry measurements at 405 and 532 nm and from UV-vis spectrometry measurements of methanol extracts of filter-collected particles (300 to 600 nm). At 405 nm, SOA MAC values and imaginary refractive indices increased with increasing oxidation level and decreased with increasing wavelength, leading to negligible absorption at 532 nm. Real refractive indices of SOA decreased with increasing oxidation level. Comparison with literature studies suggests that under typical polluted conditions the effect of NOx on SOA absorption is small. SOA may contribute significantly to atmospheric BrC, with the magnitude dependent on both precursor type and oxidation level.
AB - Brown carbon (BrC), which may include secondary organic aerosol (SOA), can be a significant climate-forcing agent via its optical absorption properties. However, the overall contribution of SOA to BrC remains poorly understood. Here, correlations between oxidation level and optical properties of SOA are examined. SOA was generated in a flow reactor in the absence of NOx by OH oxidation of gas-phase precursors used as surrogates for anthropogenic (naphthalene, tricyclo[5.2.1.02,6]decane), biomass burning (guaiacol), and biogenic (α-pinene) emissions. SOA chemical composition was characterized with a time-of-flight aerosol mass spectrometer. SOA mass-specific absorption cross sections (MAC) and refractive indices were calculated from real-time cavity ring-down photoacoustic spectrometry measurements at 405 and 532 nm and from UV-vis spectrometry measurements of methanol extracts of filter-collected particles (300 to 600 nm). At 405 nm, SOA MAC values and imaginary refractive indices increased with increasing oxidation level and decreased with increasing wavelength, leading to negligible absorption at 532 nm. Real refractive indices of SOA decreased with increasing oxidation level. Comparison with literature studies suggests that under typical polluted conditions the effect of NOx on SOA absorption is small. SOA may contribute significantly to atmospheric BrC, with the magnitude dependent on both precursor type and oxidation level.
U2 - 10.1021/es401043j
DO - 10.1021/es401043j
JO - Environmental Science & Technology
JF - Environmental Science & Technology
Lambe AT, Cappa CD, Massoli P, Onasch TB, Forestieri SD, Martin AT et al. Relationship between oxidation level and optical properties of secondary organic aerosol. Environmental Science and Technology. 2013 Jun 18;47(12):6349-6357. doi: 10.1021/es401043j