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Applied Optics

Applied Optics


  • Vol. 33, Iss. 30 — Oct. 20, 1994
  • pp: 7132–7140

Tropospheric aerosol optical properties derived from lidar, sun photometer, and optical particle counter measurements

Tamio Takamura, Yasuhiro Sasano, and Tadahiro Hayasaka  »View Author Affiliations

Applied Optics, Vol. 33, Issue 30, pp. 7132-7140 (1994)

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Tropospheric aerosols have been observed for the period from November 1990 to April 1992 with a lidar, a sun photometer, and an optical particle counter. Variations of aerosol optical thickness derived from the lidar and the sun photometer data and measurements are presented. The simultaneous measurements of these instruments also allowed us to estimate the extinction-to-backscatter ratio (S1), which ranged from 20 to 70. Comparison of optical thicknesses derived from both instruments clearly shows the effect of Mt. Pinatubo’s eruption and the temporal variation of optical thickness in the stratosphere over 12 km. The possible range of the complex refractive index for the columnar mean aerosols can be deduced from the probable range of S1 derived by the use of an S1 diagram as a function of complex refractive index (m). The imaginary part of m can be estimated provided that the real part of m is known.

© 1994 Optical Society of America

Original Manuscript: October 26, 1993
Revised Manuscript: May 16, 1994
Published: October 20, 1994

Tamio Takamura, Yasuhiro Sasano, and Tadahiro Hayasaka, "Tropospheric aerosol optical properties derived from lidar, sun photometer, and optical particle counter measurements," Appl. Opt. 33, 7132-7140 (1994)

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