Soot in Urban Atmospheres: Determination by an Optical Absorption Technique

  title={Soot in Urban Atmospheres: Determination by an Optical Absorption Technique},
  author={H. Rosen and A. Hansen and R. Dod and T. Novakov},
  pages={741 - 744}
We have used the high optical absorptivity of urban and source particulates to trace their "graphitic" component. The optical absorptivity and the particulate carbon loading show a strong correlation. Analyses of the data indicate that primary soot emissions compose a major fraction of the carbonaceous aerosol and put a low limit on secondary organic material produced in correlation with the ozone concentration. 
Graphitic Carbon in Urban Environments and the Arctic
The application of the Raman scattering, photoacoustic, optical attenuation, opticothermal analysis, and solvent extraction techniques to the characterization of the graphitic component of urban andExpand
Particulate air pollutants: A comparison of British “Smoke” with optical absorption coefficient and elemental carbon concentration
Abstract Atmospheric aerosol samples collected simultaneously on four different filter media support the hypothesis that reflectance, as measured by the British “Smoke” method, is controlled by theExpand
The contribution of elemental carbon to the optical properties of rural atmospheric aerosols
Measurements of carbonaceous aerosol, aerosol light absorption and aerosol light scattering were made at two rural sites in southwestern Pennsylvania during August 1983. Aerosol light absorptionExpand
Elemental carbon in the atmosphere: challenges for the trace analyst
SummaryElemental carbon is an ubiquitous part of the atmospheric aerosol, originating from all combustion processes. It influences the radiative transfer by its absorbing properties leading toExpand
Carbonaceous particles in the atmosphere consist of two major components — graphitic or black carbon and organic material. The organic component can either be directly emitted from sources (primaryExpand
Identification of soot particles in air using polarization scattering method
Light scattering in atmosphere can change optical polarization properties. Analysis and Measurement on interaction of polarized light with atmospheric particulates can provide important informationExpand
Optical transmission through aerosol deposits on diffusely reflective filters: a method for measuring the absorbing component of aerosol particles.
A laser transmission technique developed at Lawrence Berkeley Laboratory has been used extensively to determine the absorption coefficient and the graphitic carbon content of aerosols in the United States, some areas of Europe, and the Arctic region. Expand
Microchemical Characterization of Aerosols
This paper outlines a methodology to quantitatively differentiate classes of ambient particulate carbon. The analysis of results provides an assessment of the amounts of primary and secondaryExpand
Analytical Chemistry of the Atmospheric Aerosol
In the following contribution it is shown, how analytical chemistry can be used for the characterization of the atmospheric aerosol. After an introductory discussion about nature and origin ofExpand
Soot in the Arctic
Abstract Substantial concentrations of graphitic carbon and its associated large optical absorption coefficient are observed in the Arctic. The graphitic content shows a dramatic increase from lateExpand


Identification of the optically absorbing component in urban aerosols.
Raman spectroscopy is used to determine the absorptivity of urban particulates for combustion sources and its application in combustion sources is still under investigation. Expand
Sulfates as Pollution Particulates: Catalytic Formation on Carbon (Soot) Particles
Experimental evidence is presented which shows that finely divided carbon (soot) particles may play a major role in the catalytic oxidation of sulfur dioxide to sulfate in polluted atmospheres. Expand
Photoacoustic investigation of urban aerosol particles.
A photoacoustic investigation gives an independent verification of the hypothesis that the absorbing species in urban par­ ticulates is graphitic carbon and questions have been raised whether the optical attenuation technique exclusively mea­ sures the absorbing rather than the scattering component of the aerosol. Expand
Analysis of carbonaceous materials in Southern California atmospheric aerosols
A technique is described for estimating the contributions of elemental carbon and primary organic and secondary organic materials to atmospheric particulate matter collected in California's SouthExpand
Formation of pollution particulate nitrogen compounds by NO-soot and NH3-soot gas-particle surface reactions
Abstract Three reduced forms of nitrogen are associated with ambient air pollution particulates: ammonium and two additional species assigned to amine and/or amide and to nitrile. Nitrogen species ofExpand
The hypothesis that much of the carbonaceous material in urban environments
  • Novakov, in Proceedings, Second Joint Conference on Sensing of Environmental Pollutants (Instrument Society of America, Pittsburgh,
  • 1974
inAtmo- spheric Aerosol Research Annual Report 197778 (Report LBL-8696
  • Lawrence Berkeley Lab- oratory, Berkeley,
  • 1979
Argonne National Laboratory and the personnel of the Bay Area Air Quality Management District and of the South Coast Air Quality Management District for their coopera