Publication Abstracts
Sun et al. 2013
Sun, W., Z. Liu, G. Videen, Q. Fu, K. Muinonen, D.M. Winker, C. Lukashin, Z. Jin, B. Lin, and J. Huang, 2013: For the depolarization of linearly polarized light by smoke particles. J. Quant. Spectrosc. Radiat. Transfer, 122, 233-237, doi:10.1016/j.jqsrt.2012.03.031.
The CALIPSO satellite mission consistently measures volume (including molecule and particulate) light depolarization ratio of ∼2% for smoke, compared to ∼1% for marine aerosols and ∼15% for dust. The observed ∼2% smoke depolarization ratio comes primarily from the nonspherical habits of particles in the smoke at certain particle sizes. In this study, the depolarization of linearly polarized light by small sphere aggregates and irregular Gaussian-shaped particles is studied, to reveal the physics between the depolarization of linearly polarized light and smoke aerosol shape and size. It is found that the depolarization ratio curves of Gaussian-deformed spheres are very similar to sphere aggregates in terms of scattering-angle dependence and particle size parameters when particle size parameter is smaller than 1.0π. This demonstrates that small randomly oriented nonspherical particles have some common depolarization properties as functions of scattering angle and size parameter. This may be very useful information for characterization and active remote sensing of smoke particles using polarized light. We also show that the depolarization ratio from the CALIPSO measurements could be used to derive smoke aerosol particle size. From the calculation results for light depolarization ratio by Gaussian-shaped smoke particles and the CALIPSO-measured light depolarization ratio of ∼2% for smoke, the mean particle size of South-African smoke is estimated to be about half of the 532nm wavelength of the CALIPSO lidar.
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BibTeX Citation
@article{su08100s,
author={Sun, W. and Liu, Z. and Videen, G. and Fu, Q. and Muinonen, K. and Winker, D. M. and Lukashin, C. and Jin, Z. and Lin, B. and Huang, J.},
title={For the depolarization of linearly polarized light by smoke particles},
year={2013},
journal={Journal of Quantitative Spectroscopy and Radiative Transfer},
volume={122},
pages={233--237},
doi={10.1016/j.jqsrt.2012.03.031},
}
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RIS Citation
TY - JOUR ID - su08100s AU - Sun, W. AU - Liu, Z. AU - Videen, G. AU - Fu, Q. AU - Muinonen, K. AU - Winker, D. M. AU - Lukashin, C. AU - Jin, Z. AU - Lin, B. AU - Huang, J. PY - 2013 TI - For the depolarization of linearly polarized light by smoke particles JA - J. Quant. Spectrosc. Radiat. Transfer JO - Journal of Quantitative Spectroscopy and Radiative Transfer VL - 122 SP - 233 EP - 237 DO - 10.1016/j.jqsrt.2012.03.031 ER -
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