| 光谱学与光谱分析 |
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| Retrieve of Red Tide Distributions from MODIS Data Based on the Characteristics of Water Spectrum |
| QIU Zhong-feng1, CUI Ting-wei2, HE Yi-jun1* |
1. Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
2. First Institute of Oceanography, SOA, Qingdao 266071, China |
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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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Received: 2010-10-19
Accepted: 2011-04-14
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Corresponding Authors:
HE Yi-jun
E-mail: heyj@qdio.ac.cn
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