Preliminary experimental study on lidar detection of chlorophyll-a and suspended matter concentration in seawater surface

doi:10.3969/j.issn.1007-5461.2024.05.010

Abstract

Abstract: A dual-field-of-view oceanic lidar system was designed and developed to meet the actual demand of on line monitoring of seawater surface parameters such as chlorophyll-a and suspended matter concentrations. Firstly, the measurement experiment of chlorophyll-a concentration was carried out in the laboratory using an experimental tank. It was shown that the correlation coefficient between the results measured by the developed system and those of chlorophyll fluorimeter/nephelometer was 0.94, and the chlorophyll-a concentrations measured under different laser excitation energies were also consistent with those of chlorophyll fluorometer/nephelometer. Meanwhile, the calibration experiments were also carried out on the concentration of suspended matter with different particle sizes, and the corresponding correlation coefficient between the results measured by the developed system and those of the chlorophyll fluorometer/nephelometer was better than 0.91. Then, by using the developed oceanic lidar, the concentration of chlorophyll-a and suspended matter in the seawater surface off the coast of Qingdao were measured on-site, and the correlation coefficients between the results of the lidar system and of the chlorophyll fluorometer/nephelometer were 0.74 and 0.86, respectively, preliminarily verifying the feasibility of applying the self-developed oceanic lidar for detecting the concentration of chlorophyll-a and suspended matter in seawater surface.

Key words: laser techniques, oceanic lidar, laser remote sensing, chlorophyll-a concentration, suspended matter concentration

CLC Number:

TN958

XU Jie, WANG Zhangjun, CHEN Chao, ZHUANG Quanfeng, WU Jiasheng, GUO Tiantian. Preliminary experimental study on lidar detection of chlorophyll-a and suspended matter concentration in seawater surface[J]. Chinese Journal of Quantum Electronics, 2024, 41(5): 802-812.

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