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Article

Aerosol Optical Thickness Measurement with Elevation-Scanning Lidar

Pavel I. Ionov 1 and Andrew K. Mollner 1
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  • 1 The Aerospace Corporation, Los Angeles, California
Print Publication:
01 Jul 2015
DOI:
https://doi.org/10.1175/JTECH-D-14-00183.1
Page(s):
1364–1371
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Abstract

High-accuracy measurement of aerosol optical thickness (AOT) τa with an elevation-scanning lidar is demonstrated and the results are compared with a collocated Cimel 318 sun photometer. Linear regression of the time-coincident data from a 2-week measurement campaign with the two instruments is found to be τalidar = (1.00 ± 0.17)τaphot + (0.025 ± 0.019) (1σ). The method proved to have sufficient accuracy to measure AOTs of 0.1–0.2 commonly seen in relatively clear atmosphere. The measurement is absolute and thus does not depend on any external calibration standards.

Denotes Open Access content.

Corresponding author address: Pavel Ionov, The Aerospace Corporation, M2/253, P.O. Box 92957, Los Angeles, CA 90009-2957. E-mail: pavel.ionov@aero.org

Abstract

High-accuracy measurement of aerosol optical thickness (AOT) τa with an elevation-scanning lidar is demonstrated and the results are compared with a collocated Cimel 318 sun photometer. Linear regression of the time-coincident data from a 2-week measurement campaign with the two instruments is found to be τalidar = (1.00 ± 0.17)τaphot + (0.025 ± 0.019) (1σ). The method proved to have sufficient accuracy to measure AOTs of 0.1–0.2 commonly seen in relatively clear atmosphere. The measurement is absolute and thus does not depend on any external calibration standards.

Denotes Open Access content.

Corresponding author address: Pavel Ionov, The Aerospace Corporation, M2/253, P.O. Box 92957, Los Angeles, CA 90009-2957. E-mail: pavel.ionov@aero.org
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