Active remote sensing of atmospheric dust using relationships between their depolarization ratios and reflectivity

Evgenij Zubko; Konstantin Shmirko; Konstantin Shmirko; Andrey Pavlov; Wenbo Sun; Wenbo Sun; Gregory L. Schuster; Yongxiang Hu; Snorre Stamnes; Ali Omar; Rosemary R. Baize; M. Patrick McCormick; Robert Loughman; Jessica A. Arnold; Gorden Videen; Gorden Videen; Gorden Videen

doi:10.1364/OL.426584

Optics Letters
Vol. 46,
Issue 10,
pp. 2352-2355
(2021)
•https://doi.org/10.1364/OL.426584

Active remote sensing of atmospheric dust using relationships between their depolarization ratios and reflectivity

Evgenij Zubko, Konstantin Shmirko, Andrey Pavlov, Wenbo Sun, Gregory L. Schuster, Yongxiang Hu, Snorre Stamnes, Ali Omar, Rosemary R. Baize, M. Patrick McCormick, Robert Loughman, Jessica A. Arnold, and Gorden Videen

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Evgenij Zubko, Konstantin Shmirko, Andrey Pavlov, Wenbo Sun, Gregory L. Schuster, Yongxiang Hu, Snorre Stamnes, Ali Omar, Rosemary R. Baize, M. Patrick McCormick, Robert Loughman, Jessica A. Arnold, and Gorden Videen, "Active remote sensing of atmospheric dust using relationships between their depolarization ratios and reflectivity," Opt. Lett. 46, 2352-2355 (2021)

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Abstract

The backscattered light from agglomerated debris particles shows that an approximate linear correlation exists between the logarithm of the geometric albedo $ \log(A )$ of polydispersions of agglomerated debris particles and their lidar linear or circular depolarization ratios, $ \unicode{x00B5}_L$ and $ \unicode{x00B5}_C$. The nature of the relationship depends on the complex refractive index of the particles in the distribution. This extension of the Umov law can be used for lidar and radar characterizations by placing constraints on the reflectivity of the particles. It suggests that an approximate inverse relationship exists between the lidar ratio and the lidar depolarization ratios whose scaling parameter depends on the refractive index of the aerosol population.

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Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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	$µ_{L}$			$µ_{C}$
$m$	$a$	$b$	$r^{2}$	$a$	$b$	$r^{2}$
$1.313 + 0 i$	3.382	2.368	0.999	0.931	2.164	0.985
$1.4 + 0 i$	3.676	2.259	0.999	1.001	2.030	0.988
$1.4 + 0.01 i$	3.175	2.169	0.995	0.943	2.021	0.977
$1.4 + 0.02 i$	2.438	2.034	0.958	0.721	1.924	0.918
$1.4 + 0.05 i$	2.849	2.103	0.941	1.112	2.069	0.922
$1.4 + 0.1 i$	3.896	2.172	0.911	1.734	2.161	0.903
$1.5 + 0 i$	3.500	2.156	1.000	0.870	1.867	0.993
$1.5 + 0.01 i$	3.047	2.033	0.998	0.836	1.845	0.984
$1.5 + 0.02 i$	2.366	1.905	0.976	0.644	1.762	0.943
$1.5 + 0.05 i$	2.203	1.903	0.952	0.784	1.856	0.929
$1.5 + 0.1 i$	2.261	1.943	0.883	0.947	1.928	0.868
$1.6 + 0.0005 i$	3.488	2.071	0.999	0.883	1.781	0.999
$1.6 + 0.01 i$	2.957	1.933	0.999	0.788	1.727	0.991
$1.6 + 0.02 i$	2.328	1.797	0.980	0.620	1.640	0.955
$1.6 + 0.05 i$	2.133	1.825	0.967	0.703	1.755	0.945
$1.6 + 0.1 i$	1.955	1.825	0.903	0.774	1.803	0.886
$1.7 + 0 i$	3.493	2.002	0.999	0.937	1.734	1.000
$1.7 + 0.01 i$	3.032	1.883	1.000	0.825	1.672	0.996
$1.7 + 0.02 i$	2.346	1.730	0.983	0.638	1.572	0.968
$1.7 + 0.05 i$	1.971	1.692	0.965	0.637	1.621	0.944
$1.7 + 0.1 i$	1.717	1.722	0.903	0.649	1.694	0.885

	$µ_{L}$			$µ_{C}$
$R e (m)$	$A$	$b$	$r^{2}$	$a$	$b$	$r^{2}$
1.4	3.255	2.152	0.981	1.184	2.102	0.973
1.5	2.944	2.003	0.992	1.001	1.933	0.989
1.6	2.897	1.915	0.995	0.969	1.836	0.994
1.7	2.873	1.842	0.992	0.939	1.748	0.995

	$µ_{L}$			$µ_{C}$
$m$	$a$	$b$	$r^{2}$	$a$	$b$	$r^{2}$
$1.313 + 0 i$	3.382	2.368	0.999	0.931	2.164	0.985
$1.4 + 0 i$	3.676	2.259	0.999	1.001	2.030	0.988
$1.4 + 0.01 i$	3.175	2.169	0.995	0.943	2.021	0.977
$1.4 + 0.02 i$	2.438	2.034	0.958	0.721	1.924	0.918
$1.4 + 0.05 i$	2.849	2.103	0.941	1.112	2.069	0.922
$1.4 + 0.1 i$	3.896	2.172	0.911	1.734	2.161	0.903
$1.5 + 0 i$	3.500	2.156	1.000	0.870	1.867	0.993
$1.5 + 0.01 i$	3.047	2.033	0.998	0.836	1.845	0.984
$1.5 + 0.02 i$	2.366	1.905	0.976	0.644	1.762	0.943
$1.5 + 0.05 i$	2.203	1.903	0.952	0.784	1.856	0.929
$1.5 + 0.1 i$	2.261	1.943	0.883	0.947	1.928	0.868
$1.6 + 0.0005 i$	3.488	2.071	0.999	0.883	1.781	0.999
$1.6 + 0.01 i$	2.957	1.933	0.999	0.788	1.727	0.991
$1.6 + 0.02 i$	2.328	1.797	0.980	0.620	1.640	0.955
$1.6 + 0.05 i$	2.133	1.825	0.967	0.703	1.755	0.945
$1.6 + 0.1 i$	1.955	1.825	0.903	0.774	1.803	0.886
$1.7 + 0 i$	3.493	2.002	0.999	0.937	1.734	1.000
$1.7 + 0.01 i$	3.032	1.883	1.000	0.825	1.672	0.996
$1.7 + 0.02 i$	2.346	1.730	0.983	0.638	1.572	0.968
$1.7 + 0.05 i$	1.971	1.692	0.965	0.637	1.621	0.944
$1.7 + 0.1 i$	1.717	1.722	0.903	0.649	1.694	0.885

	$µ_{L}$			$µ_{C}$
$R e (m)$	$A$	$b$	$r^{2}$	$a$	$b$	$r^{2}$
1.4	3.255	2.152	0.981	1.184	2.102	0.973
1.5	2.944	2.003	0.992	1.001	1.933	0.989
1.6	2.897	1.915	0.995	0.969	1.836	0.994
1.7	2.873	1.842	0.992	0.939	1.748	0.995

Abstract

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Equations (3)

Optics Letters