Experimental analysis on the optimal spectral index for the risk assessment of red tide occurrence

Ming XIE; Mian QIN; Ying LI; Zhichen LIU; Tao GOU

doi:10.1007/s00343-024-3256-0

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Experimental analysis on the optimal spectral index for the risk assessment of red tide occurrence

Physics | Updated：2025-05-27

- Experimental analysis on the optimal spectral index for the risk assessment of red tide occurrence
- Experimental analysis on the optimal spectral index for the risk assessment of red tide occurrence
- 海洋湖沼学报(英文) 2025年43卷第3期页码：735-745
- Affiliations：
  
  1.Navigation College, Dalian Maritime University, Dalian 116026, China
  2.College of Marine Electrical Engineering, Dalian Maritime University, Dalian 116026, China
- Author bio：
  
  yldmu@dlmu.edu.cn
- Funds：
  
  the National Key R&D Program of China(2023YFC3108300);the Dalian High-level Talent Innovation Program(2022RG02);the Fundamental Research Funds for the Central Universities(3132023507)
- DOI：10.1007/s00343-024-3256-0
  中图分类号：
- 收稿：2023-12-01，
  
  网络首发：2024-05-20，
  
  纸质出版：2025-05-01
- Accepted：
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Experimental analysis on the optimal spectral index for the risk assessment of red tide occurrence[J]. 海洋湖沼学报(英文), 2025,43(3):735-745.

XIE Ming,QIN Mian,LI Ying,et al.Experimental analysis on the optimal spectral index for the risk assessment of red tide occurrence[J].Journal of Oceanology and Limnology,2025,43(03):735-745.
Experimental analysis on the optimal spectral index for the risk assessment of red tide occurrence[J]. 海洋湖沼学报(英文), 2025,43(3):735-745. DOI： 10.1007/s00343-024-3256-0.

XIE Ming,QIN Mian,LI Ying,et al.Experimental analysis on the optimal spectral index for the risk assessment of red tide occurrence[J].Journal of Oceanology and Limnology,2025,43(03):735-745. DOI： 10.1007/s00343-024-3256-0.

摘要

Abstract

As a frequently occurred marine pollution phenomenon

red tides of water body due to eutrophication cause massive mortality of marine organisms and serious ecological problems. The early warning and prediction of red tide outbreak can provide guidance to the coastal management

and is of great value to the aquaculture industry and marine environment protection. An approach for the risk assessment of red tide occurrence using spectral indices was made. The optimal spectral indices were explored from three candidates

namely two-band ratio (TBR) method

three-band spectral index (TBSI) method

and fluorescence baseline (FLB) method. The correlations between the spectral indices and the red tide occurrence were quantitatively evaluated through analysis of variance (ANOVA). The risk maps for the Beibu Gulf and the Bohai Bay in China were produced with the normalized spectral indices based on the multi-spectral observation from Sentinel-3 satellite. Results show that both TBR and TBSI values have significant correlations with the occurrences of red tide as the ANOVA results. TBSI illustrated correctly the risk of red tide occurrence in the risk maps and was the optimal spectral index offshore risk assessment of red tide. FLB method failed to recognize the high-risk regions and may not be the appropriate spectral index. The risk assessment method proposed in this study can provide early alarms on red tide occurrence and help timely the countermeasure against potential harms.

关键词

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references

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