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M=1.33 1.45 1.59

M=1.33 1.45 1.59. 0.1 µm 0.2 0.3 0.4. White light. M=1.33 1.45 1.59. M=1.33 1.45 1.59. 1.0 µm X=10. 0.5 µm 0.6 0.7 0.8.

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M=1.33 1.45 1.59

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  1. M=1.33 1.45 1.59 0.1 µm 0.2 0.3 0.4 White light

  2. M=1.33 1.45 1.59 M=1.33 1.45 1.59 1.0 µm X=10 0.5 µm 0.6 0.7 0.8

  3. Deshler, T., Observations for Chemistry (In Situ): Particles, article for Encyclopedia of Atmospheric Science, Academic Press, 2002.

  4. Wyoming Optical Particle Counter, r > 0.2 - 10.0 m Aerosol in Optical Chamber Processor White light PHA PMTs Pump

  5. Sources of Error • Size • Chromatic nature of light source • Aerosol index of refraction and shape • Uniformity of illumination • PMT response – pulse width broadening • Number concentration • Flow rate • Coincidence • Poisson counting uncertainty Deshler, T., M. E. Hervig, D. J. Hofmann, J. M. Rosen, and J. B. Liley, Thirty years of in situ stratospheric aerosol size distribution measurements from Laramie, Wyoming (41N), using balloon-borne instruments, J. Geophys. Res., 108(D5), 4167, doi:10.1029/2002JD002514, 2003

  6. 1971 - 1990 1990 - present Post El Chichon

  7. Low Gain Mid Gain High Gain

  8. Eidhammer, T., D. C. Montague, and T. Deshler, Determination of Index of Refraction and Size of Supermicrometer Particles from Light Scattering Measurements at Two Angles, J. Geophys. Res., in press, May 2007.

  9. SAGE II HALOE

  10. Deshler et al., JGR, 2003

  11. Comparison with SAGE II Extinction. Kovilakam and Deshler, 2014,

  12. Comparison with HALOE Extinction. Kovilakam and Deshler, 2014,

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