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Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy
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Published on: January 9, 2017

Relation between circular and linear depolarization ratios under multiple-scattering conditions.

Gilles Roy1, Nathalie Roy

  • 1RDDC Valcartier, Québec, Canada. gilles.roy@drdc-rddc.gc.ca

Applied Optics
|December 17, 2008
PubMed
Summary
This summary is machine-generated.

A new relationship between linear and circular depolarization ratios in spherical particle clouds was found. This finding, validated by lidar measurements and theory, holds true for single scattering events.

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Area of Science:

  • Atmospheric Optics
  • Cloud Physics
  • Remote Sensing

Background:

  • Depolarization ratios are key cloud microphysical properties.
  • Multiple scattering effects complicate depolarization measurements.
  • Spherical particle clouds are common atmospheric phenomena.

Purpose of the Study:

  • Establish a simple relationship between linear and circular depolarization ratios for spherical particle clouds.
  • Validate this relationship theoretically and experimentally.
  • Determine the conditions under which the relationship remains valid.

Main Methods:

  • Theoretical validation using double-scattering calculations.
  • Experimental validation using multiple-field-of-view (MFOV) lidar.
  • Analysis of data from lidar with linear and circular polarization capabilities.

Main Results:

  • A simple relationship between linear and circular depolarization ratios was established.
  • Theoretical and experimental results align for small optical depths.
  • The relationship remains valid under single scattering dominance, even at higher optical depths.

Conclusions:

  • The established relationship provides a simplified method for analyzing cloud depolarization.
  • The findings are robust for single scattering dominated scenarios.
  • Further investigation is needed for complex multiple scattering conditions.