High-precision day-night continuous observation of aerosol with high-spectral-resolution lidar

Lingyun Wu; Weize Li; Da Xiao; Feitong Chen; Chuxiao Chen; Dong Liu

doi:10.1117/12.2692284

18 December 2023 High-precision day-night continuous observation of aerosol with high-spectral-resolution lidar

Lingyun Wu, Weize Li, Da Xiao, Feitong Chen, Chuxiao Chen, Dong Liu

Proceedings Volume 12968, AOPC 2023: Optic Fiber Gyro ; 1296808 (2023) https://doi.org/10.1117/12.2692284
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

Atmospheric aerosols have a significant impact on the earth's environment and climate, directly or indirectly affecting human production and life. The high-precision detection of atmospheric aerosol characteristics plays a fundamental guiding role in systematically studying climate and meteorology. By actively emitting laser light and receiving backscattered signals, the atmospheric parameter profile in the detection direction can be obtained, which gives lidar the advantage of high temporal and spatial resolution. Among the lidars, the high-spectral-resolution lidar (HSRL) has high signal-to-noise ratio, and can realize high-precision day and night observation. It has great scientific potential in studying scientific issues such as aerosol transmission mechanisms, cloud-aerosol interaction process, etc. This paper reports a ground-based HSRL based on iodine molecular absorption cell developed by Zhejiang University. The basic principle and hardware system structure of the HSRL are introduced in the paper. This lidar provides vertical profiles of aerosol scattering ratio together with lidar ratio and particle depolarization ratio at 532 nm. In the field observation experiment carried out in Beijing, the lidar was compared with instruments such as sun photometer and Raman lidar. The field experimental have proved that the observation results of the HSRL developed are in good agreement with the sun photometer, which verifies the accuracy of the HSRL's daytime observations. In the comparative observation experiment with Raman radar, the night data has a high degree of consistency, and the HSRL can obtain a better signal-to-noise ratio in daytime, which verifies the great value of the HSRL in atmospheric detection.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Lingyun Wu, Weize Li, Da Xiao, Feitong Chen, Chuxiao Chen, and Dong Liu "High-precision day-night continuous observation of aerosol with high-spectral-resolution lidar", Proc. SPIE 12968, AOPC 2023: Optic Fiber Gyro , 1296808 (18 December 2023); https://doi.org/10.1117/12.2692284

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KEYWORDS

LIDAR

Atmospheric particles

Mie scattering

Aerosols

Raman scattering

Backscatter

Atmospheric sensing

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