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[Retrieve of red tide distributions from MODIS data based on the characteristics of water spectrum]. | LitMetric

[Retrieve of red tide distributions from MODIS data based on the characteristics of water spectrum].

Guang Pu Xue Yu Guang Pu Fen Xi

Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.

Published: August 2011

AI Article Synopsis

  • - The authors created a method to identify red tide distributions using MODIS data by examining differences in water spectra between red tide and normal water.
  • - They validated this method with 119 in situ observations, successfully detecting red tide in all but one case.
  • - When applied to MODIS data from April 4, 2005, the method revealed three significant areas of red tide, totaling about 2,000 km², correlating well with high chlorophyll a concentrations.

Article Abstract

After comparing the spectral differences between red tide water and normal water, we developed a method to retrieve red tide distributions from MODIS data based on the characteristics of red tide water spectrum. The authors used the 119 series of in situ observations to validate the method and found that only one observation has not been detected correctly. The authors then applied this method to MODIS data on April 4, 2005. In the research areas three locations of red tide water were apparently detected with the total areas about 2 000 km2. The retrieved red tide distributions are in good agreement with the distributions of high chlorophyll a concentrations. The research suggests that the method is available to eliminating the influence of suspended sediments and can be used to retrieve the locations and areas of red tide water.

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