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  1. T. Novakov, “Soot in the Atmosphere,” H. Rosen et al., “Graphitic Carbon in Urban Environments and the Arctic,” in Particulate Carbon: Atmospheric Life Cycle, G. T. Wolff, R. L. Klimisch, Eds. (Plenum, New York, 1982), pp. 19 and 273.
    [Crossref]
  2. G. T. Wolff, P. J. Groblicki, S. H. Cadle, R. J. Countess, “Particulate Carbon at Various Locations in the United States,” in Particulate Carbon: Atmospheric Life Cycle, G. T. Wolff, R. L. Klimisch, Eds. (Plenum, New York, 1982), p. 297.
    [Crossref]
  3. G. W. Paltridge, C. M. R. Platt, Radiative Processes in Meteorology and Climatology (Elsevier, Oxford, 1976).
  4. P. Chylek, J. A. Coakley, Science 183, 75 (1974).
    [Crossref]
  5. R. G. Buettel, A. W. Brewer, J. Sci. Instrum. 26, 357 (1949).
    [Crossref]
  6. R. J. Charlson, N. C. Ahlquist, H. Selvidge, P. B. MacCready, J. Air Pollut. Control Assoc. 19, 943 (1969).
    [Crossref]
  7. H. Rosen, A. D. A. Hansen, T. Novakov, “An Instrument for the Quasi-Real-Time Measurement of the Optical Absorption Coefficient of Ambient Aerosols,” Lawrence Berkeley Laboratory report LBID-256 (1980).
  8. H. E. Gerber, Appl. Opt. 18, 1009 (1979).
    [Crossref] [PubMed]
  9. R. W. Terhune, J. E. Anderson, Opt. Lett. 1, 70 (1977).
    [Crossref] [PubMed]
  10. H. Rosen, T. Novakov, “Lawrence Berkeley Laboratory Laser Transmission Method,” Lawrence Berkeley Laboratory report LBL-13248 (1981), in Proceedings, First International Workshop on Light Absorption by Aerosols, Fort Collins, Colo., 1980, H. Gerber, E. Hindman, Eds. (Spectrum Press, to be published).
  11. H. Rosen, T. Novakov, “Optical Attenuation: A Measurement of the Absorbing Properties of Aerosol Particles,” in Atmospheric Aerosol Research Annual Report, 1977–78, T. Novakov, Ed., Lawrence Berkeley Laboratory report LBL-8696 (1978), p. 54.
  12. Z. Yasa, N. M. Amer, H. Rosen, A. D. A. Hansen, T. Novakov, Appl. Opt. 18, 2528 (1979).
    [Crossref] [PubMed]
  13. Optical multimeter model 22XL manufactured by Photodyne, Inc., Westlake Village, Calif.
  14. H. Rosen, A. D. A. Hansen, L. Gundel, T. Novakov, Appl. Opt. 17, 3859 (1978).
    [Crossref] [PubMed]
  15. T. Novakov, “Microchemical Characterization of Aerosols,” in Nature, Aim, and Methods of Microchemistry, H. Malissa, M. Grasserbauer, R. Belcher, Eds. (Springer, Vienna, 1981), p. 141.
    [Crossref]
  16. L. Gundel, R. Dod, T. Novakov, “Determination of Black Carbon by Thermal Analysis,” in Environmental Pollutant Studies: Chapter from the Energy and Environment Division Annual Report 1980, Lawrence Berkeley Laboratory report LBL-11986 (1981), pp. 5–26.
  17. A. I. Medalia, L. W. Richards, J. Colloid Interface Sci. 40, 223 (1972).
    [Crossref]
  18. T. J. Truex, J. E. Anderson, Atmos. Environ. 13, 507 (1979).
    [Crossref]
  19. A. C. Szkarlat, S. M. Japar, Appl. Opt. 20, 1151 (1981).
    [Crossref] [PubMed]
  20. T. G. Dzubay et al., “Visibility and Aerosol Composition in Houston, Texas,” submitted to Environ. Sci. Technol. (1981).

1981 (1)

1979 (3)

1978 (1)

1977 (1)

1974 (1)

P. Chylek, J. A. Coakley, Science 183, 75 (1974).
[Crossref]

1972 (1)

A. I. Medalia, L. W. Richards, J. Colloid Interface Sci. 40, 223 (1972).
[Crossref]

1969 (1)

R. J. Charlson, N. C. Ahlquist, H. Selvidge, P. B. MacCready, J. Air Pollut. Control Assoc. 19, 943 (1969).
[Crossref]

1949 (1)

R. G. Buettel, A. W. Brewer, J. Sci. Instrum. 26, 357 (1949).
[Crossref]

Ahlquist, N. C.

R. J. Charlson, N. C. Ahlquist, H. Selvidge, P. B. MacCready, J. Air Pollut. Control Assoc. 19, 943 (1969).
[Crossref]

Amer, N. M.

Anderson, J. E.

T. J. Truex, J. E. Anderson, Atmos. Environ. 13, 507 (1979).
[Crossref]

R. W. Terhune, J. E. Anderson, Opt. Lett. 1, 70 (1977).
[Crossref] [PubMed]

Brewer, A. W.

R. G. Buettel, A. W. Brewer, J. Sci. Instrum. 26, 357 (1949).
[Crossref]

Buettel, R. G.

R. G. Buettel, A. W. Brewer, J. Sci. Instrum. 26, 357 (1949).
[Crossref]

Cadle, S. H.

G. T. Wolff, P. J. Groblicki, S. H. Cadle, R. J. Countess, “Particulate Carbon at Various Locations in the United States,” in Particulate Carbon: Atmospheric Life Cycle, G. T. Wolff, R. L. Klimisch, Eds. (Plenum, New York, 1982), p. 297.
[Crossref]

Charlson, R. J.

R. J. Charlson, N. C. Ahlquist, H. Selvidge, P. B. MacCready, J. Air Pollut. Control Assoc. 19, 943 (1969).
[Crossref]

Chylek, P.

P. Chylek, J. A. Coakley, Science 183, 75 (1974).
[Crossref]

Coakley, J. A.

P. Chylek, J. A. Coakley, Science 183, 75 (1974).
[Crossref]

Countess, R. J.

G. T. Wolff, P. J. Groblicki, S. H. Cadle, R. J. Countess, “Particulate Carbon at Various Locations in the United States,” in Particulate Carbon: Atmospheric Life Cycle, G. T. Wolff, R. L. Klimisch, Eds. (Plenum, New York, 1982), p. 297.
[Crossref]

Dod, R.

L. Gundel, R. Dod, T. Novakov, “Determination of Black Carbon by Thermal Analysis,” in Environmental Pollutant Studies: Chapter from the Energy and Environment Division Annual Report 1980, Lawrence Berkeley Laboratory report LBL-11986 (1981), pp. 5–26.

Dzubay, T. G.

T. G. Dzubay et al., “Visibility and Aerosol Composition in Houston, Texas,” submitted to Environ. Sci. Technol. (1981).

Gerber, H. E.

Groblicki, P. J.

G. T. Wolff, P. J. Groblicki, S. H. Cadle, R. J. Countess, “Particulate Carbon at Various Locations in the United States,” in Particulate Carbon: Atmospheric Life Cycle, G. T. Wolff, R. L. Klimisch, Eds. (Plenum, New York, 1982), p. 297.
[Crossref]

Gundel, L.

H. Rosen, A. D. A. Hansen, L. Gundel, T. Novakov, Appl. Opt. 17, 3859 (1978).
[Crossref] [PubMed]

L. Gundel, R. Dod, T. Novakov, “Determination of Black Carbon by Thermal Analysis,” in Environmental Pollutant Studies: Chapter from the Energy and Environment Division Annual Report 1980, Lawrence Berkeley Laboratory report LBL-11986 (1981), pp. 5–26.

Hansen, A. D. A.

Z. Yasa, N. M. Amer, H. Rosen, A. D. A. Hansen, T. Novakov, Appl. Opt. 18, 2528 (1979).
[Crossref] [PubMed]

H. Rosen, A. D. A. Hansen, L. Gundel, T. Novakov, Appl. Opt. 17, 3859 (1978).
[Crossref] [PubMed]

H. Rosen, A. D. A. Hansen, T. Novakov, “An Instrument for the Quasi-Real-Time Measurement of the Optical Absorption Coefficient of Ambient Aerosols,” Lawrence Berkeley Laboratory report LBID-256 (1980).

Japar, S. M.

MacCready, P. B.

R. J. Charlson, N. C. Ahlquist, H. Selvidge, P. B. MacCready, J. Air Pollut. Control Assoc. 19, 943 (1969).
[Crossref]

Medalia, A. I.

A. I. Medalia, L. W. Richards, J. Colloid Interface Sci. 40, 223 (1972).
[Crossref]

Novakov, T.

Z. Yasa, N. M. Amer, H. Rosen, A. D. A. Hansen, T. Novakov, Appl. Opt. 18, 2528 (1979).
[Crossref] [PubMed]

H. Rosen, A. D. A. Hansen, L. Gundel, T. Novakov, Appl. Opt. 17, 3859 (1978).
[Crossref] [PubMed]

H. Rosen, A. D. A. Hansen, T. Novakov, “An Instrument for the Quasi-Real-Time Measurement of the Optical Absorption Coefficient of Ambient Aerosols,” Lawrence Berkeley Laboratory report LBID-256 (1980).

H. Rosen, T. Novakov, “Lawrence Berkeley Laboratory Laser Transmission Method,” Lawrence Berkeley Laboratory report LBL-13248 (1981), in Proceedings, First International Workshop on Light Absorption by Aerosols, Fort Collins, Colo., 1980, H. Gerber, E. Hindman, Eds. (Spectrum Press, to be published).

L. Gundel, R. Dod, T. Novakov, “Determination of Black Carbon by Thermal Analysis,” in Environmental Pollutant Studies: Chapter from the Energy and Environment Division Annual Report 1980, Lawrence Berkeley Laboratory report LBL-11986 (1981), pp. 5–26.

H. Rosen, T. Novakov, “Optical Attenuation: A Measurement of the Absorbing Properties of Aerosol Particles,” in Atmospheric Aerosol Research Annual Report, 1977–78, T. Novakov, Ed., Lawrence Berkeley Laboratory report LBL-8696 (1978), p. 54.

T. Novakov, “Microchemical Characterization of Aerosols,” in Nature, Aim, and Methods of Microchemistry, H. Malissa, M. Grasserbauer, R. Belcher, Eds. (Springer, Vienna, 1981), p. 141.
[Crossref]

T. Novakov, “Soot in the Atmosphere,” H. Rosen et al., “Graphitic Carbon in Urban Environments and the Arctic,” in Particulate Carbon: Atmospheric Life Cycle, G. T. Wolff, R. L. Klimisch, Eds. (Plenum, New York, 1982), pp. 19 and 273.
[Crossref]

Paltridge, G. W.

G. W. Paltridge, C. M. R. Platt, Radiative Processes in Meteorology and Climatology (Elsevier, Oxford, 1976).

Platt, C. M. R.

G. W. Paltridge, C. M. R. Platt, Radiative Processes in Meteorology and Climatology (Elsevier, Oxford, 1976).

Richards, L. W.

A. I. Medalia, L. W. Richards, J. Colloid Interface Sci. 40, 223 (1972).
[Crossref]

Rosen, H.

Z. Yasa, N. M. Amer, H. Rosen, A. D. A. Hansen, T. Novakov, Appl. Opt. 18, 2528 (1979).
[Crossref] [PubMed]

H. Rosen, A. D. A. Hansen, L. Gundel, T. Novakov, Appl. Opt. 17, 3859 (1978).
[Crossref] [PubMed]

H. Rosen, T. Novakov, “Optical Attenuation: A Measurement of the Absorbing Properties of Aerosol Particles,” in Atmospheric Aerosol Research Annual Report, 1977–78, T. Novakov, Ed., Lawrence Berkeley Laboratory report LBL-8696 (1978), p. 54.

H. Rosen, T. Novakov, “Lawrence Berkeley Laboratory Laser Transmission Method,” Lawrence Berkeley Laboratory report LBL-13248 (1981), in Proceedings, First International Workshop on Light Absorption by Aerosols, Fort Collins, Colo., 1980, H. Gerber, E. Hindman, Eds. (Spectrum Press, to be published).

T. Novakov, “Soot in the Atmosphere,” H. Rosen et al., “Graphitic Carbon in Urban Environments and the Arctic,” in Particulate Carbon: Atmospheric Life Cycle, G. T. Wolff, R. L. Klimisch, Eds. (Plenum, New York, 1982), pp. 19 and 273.
[Crossref]

H. Rosen, A. D. A. Hansen, T. Novakov, “An Instrument for the Quasi-Real-Time Measurement of the Optical Absorption Coefficient of Ambient Aerosols,” Lawrence Berkeley Laboratory report LBID-256 (1980).

Selvidge, H.

R. J. Charlson, N. C. Ahlquist, H. Selvidge, P. B. MacCready, J. Air Pollut. Control Assoc. 19, 943 (1969).
[Crossref]

Szkarlat, A. C.

Terhune, R. W.

Truex, T. J.

T. J. Truex, J. E. Anderson, Atmos. Environ. 13, 507 (1979).
[Crossref]

Wolff, G. T.

G. T. Wolff, P. J. Groblicki, S. H. Cadle, R. J. Countess, “Particulate Carbon at Various Locations in the United States,” in Particulate Carbon: Atmospheric Life Cycle, G. T. Wolff, R. L. Klimisch, Eds. (Plenum, New York, 1982), p. 297.
[Crossref]

Yasa, Z.

Appl. Opt. (4)

Atmos. Environ. (1)

T. J. Truex, J. E. Anderson, Atmos. Environ. 13, 507 (1979).
[Crossref]

J. Air Pollut. Control Assoc. (1)

R. J. Charlson, N. C. Ahlquist, H. Selvidge, P. B. MacCready, J. Air Pollut. Control Assoc. 19, 943 (1969).
[Crossref]

J. Colloid Interface Sci. (1)

A. I. Medalia, L. W. Richards, J. Colloid Interface Sci. 40, 223 (1972).
[Crossref]

J. Sci. Instrum. (1)

R. G. Buettel, A. W. Brewer, J. Sci. Instrum. 26, 357 (1949).
[Crossref]

Opt. Lett. (1)

Science (1)

P. Chylek, J. A. Coakley, Science 183, 75 (1974).
[Crossref]

Other (10)

T. Novakov, “Soot in the Atmosphere,” H. Rosen et al., “Graphitic Carbon in Urban Environments and the Arctic,” in Particulate Carbon: Atmospheric Life Cycle, G. T. Wolff, R. L. Klimisch, Eds. (Plenum, New York, 1982), pp. 19 and 273.
[Crossref]

G. T. Wolff, P. J. Groblicki, S. H. Cadle, R. J. Countess, “Particulate Carbon at Various Locations in the United States,” in Particulate Carbon: Atmospheric Life Cycle, G. T. Wolff, R. L. Klimisch, Eds. (Plenum, New York, 1982), p. 297.
[Crossref]

G. W. Paltridge, C. M. R. Platt, Radiative Processes in Meteorology and Climatology (Elsevier, Oxford, 1976).

H. Rosen, T. Novakov, “Lawrence Berkeley Laboratory Laser Transmission Method,” Lawrence Berkeley Laboratory report LBL-13248 (1981), in Proceedings, First International Workshop on Light Absorption by Aerosols, Fort Collins, Colo., 1980, H. Gerber, E. Hindman, Eds. (Spectrum Press, to be published).

H. Rosen, T. Novakov, “Optical Attenuation: A Measurement of the Absorbing Properties of Aerosol Particles,” in Atmospheric Aerosol Research Annual Report, 1977–78, T. Novakov, Ed., Lawrence Berkeley Laboratory report LBL-8696 (1978), p. 54.

T. Novakov, “Microchemical Characterization of Aerosols,” in Nature, Aim, and Methods of Microchemistry, H. Malissa, M. Grasserbauer, R. Belcher, Eds. (Springer, Vienna, 1981), p. 141.
[Crossref]

L. Gundel, R. Dod, T. Novakov, “Determination of Black Carbon by Thermal Analysis,” in Environmental Pollutant Studies: Chapter from the Energy and Environment Division Annual Report 1980, Lawrence Berkeley Laboratory report LBL-11986 (1981), pp. 5–26.

H. Rosen, A. D. A. Hansen, T. Novakov, “An Instrument for the Quasi-Real-Time Measurement of the Optical Absorption Coefficient of Ambient Aerosols,” Lawrence Berkeley Laboratory report LBID-256 (1980).

Optical multimeter model 22XL manufactured by Photodyne, Inc., Westlake Village, Calif.

T. G. Dzubay et al., “Visibility and Aerosol Composition in Houston, Texas,” submitted to Environ. Sci. Technol. (1981).

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Figures (3)

Fig. 1
Fig. 1

Block diagram of instrument. Optical and aerosol collection components: A, light source; B, 530-nm bandpass filter; C, quartz light guide; D, transparent mask; E, filter with particles collected on portion underneath hole in mask; F, filter support with optical fibers set in; G, flowmeter. Electronic system components: 1, silicon photodetectors; 2, logarithmic amplifiers; 3, difference amplifier giving output proportional to ln(I/I0); 4, A/D converter; 5, storage and subtraction; 6, variable time base; 7, D/A converter.

Fig. 2
Fig. 2

Absorption coefficient vs clock time at Lawrence Berkeley Laboratory, 1 Sept. 1981. Individual events (e.g., at 1630) may be due to the occasional passage of heavy vehicles on a nearby service road.

Fig. 3
Fig. 3

Smoothed data from Houston, Tex., 13 Sept. 1980. Lower curves show absorption coefficient measurement by this instrument and scattering coefficient measured by a conventional integrating nephelometer vs clock time. The upper curve shows the variation in single-scattering albedo ω = bs/(bs + ba). Note that the strong variations in absorption and scattering occur at different times of the day. The absorption peaks may correspond to local and regional vehicular emission patterns, while the scattering peak occurs later in the day. Variations in the albedo are significant, although some what reduced by the unusually large magnitude of the scattering coefficient.

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