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Two-wavelength lidar inversion algorithm for a two-component atmosphere with variable extinction-to-backscatter

J Ackermann1

  • 1Meteorologisches Institut der Universität München, Theresienstrasse 37, D-80333 München, Germany.

Applied Optics
|February 15, 2008
PubMed
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This study determines aerosol extinction coefficients using dual-wavelength lidar signals. The method accurately calculates atmospheric properties even with unknown lidar ratios in optically thick conditions.

Area of Science:

  • Atmospheric Science
  • Remote Sensing
  • Optical Physics

Background:

  • Accurate determination of aerosol optical properties is crucial for climate modeling and atmospheric studies.
  • Backscatter lidar provides valuable data on atmospheric aerosols, but retrieving extinction coefficients can be challenging.
  • Variability in aerosol extinction-to-backscatter ratios complicates direct measurements.

Purpose of the Study:

  • To develop and validate a numerical method for determining the aerosol extinction coefficient from backscatter lidar measurements.
  • To address the challenge of variable aerosol extinction-to-backscatter ratios in atmospheric remote sensing.
  • To assess the stability and accuracy of the proposed method under various atmospheric conditions.

Main Methods:

  • Utilized simultaneous evaluation of backscatter lidar signals at 532 nm and 1064 nm wavelengths.

Related Experiment Videos

  • Formulated basic equations for a two-component atmosphere with spatially varying lidar ratios.
  • Performed numerical simulations to test the boundary value determination method.

    • Main Results:

    • The developed method successfully determined the aerosol extinction coefficient from simulated lidar data.
    • The technique demonstrated robustness and stability for optically thick atmospheres.
    • Accurate results were obtained even when the exact profiles of lidar ratios were not precisely known.

    Conclusions:

    • The simultaneous evaluation of dual-wavelength lidar signals offers a reliable approach for aerosol extinction coefficient retrieval.
    • The method is particularly effective for optically thick atmospheric conditions, enhancing lidar data usability.
    • This technique provides a stable solution for boundary value determination, improving atmospheric aerosol characterization.