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Updated: Jun 16, 2026

Scattering And Absorption of Light in Planetary Regoliths

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Extinction and forward scattering in a settling aerosol.

B J Lipofsky, A E Green

|January 23, 2010

Summary

Researchers developed a model for aerosol particle size distribution using optical depth measurements. This model accurately describes particle sizes between 1 and 10 micrometers, validated by direct counts and light scattering experiments.

Area of Science:

Atmospheric Science
Optical Physics
Particle Physics

Background:

Aerosols significantly impact climate and air quality.
Understanding aerosol size distribution is crucial for atmospheric modeling.
Direct measurement of aerosol size distribution can be challenging.

Purpose of the Study:

To develop an analytical model for aerosol particle size distribution.
To utilize optical depth measurements for aerosol characterization.
To validate the model using independent experimental data.

Main Methods:

Measuring the optical depth of settling aerosols over time.
Fitting an analytical model to the optical depth time series.
Inverting the model to determine particle size distribution (1-10 micrometers).

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Validating the model with direct microscope counts.

Calculating and comparing forward scattered light behavior.

Main Results:

An analytical model for aerosol size distribution was successfully derived.
The model accurately represents particles in the 1-10 micrometer radius range.
Model predictions were corroborated by direct particle size counts.
Calculated forward scattered light behavior matched experimental observations.

Conclusions:

Optical depth measurements provide a viable method for characterizing aerosol size distribution.
The derived analytical model offers a robust tool for aerosol research.
The findings enhance our understanding of aerosol dynamics and optical properties.