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Proceedings Paper

Spectral characteristics analysis of red tide water in mesocosm experiment
Author(s): Tingwei Cui; Jie Zhang; Hongliang Zhang; Yi Ma; Xuemin Gao
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Paper Abstract

Mesocosm ecosystem experiment with seawater enclosed of the red tide was carried out from July to September 2001. We got four species of biology whose quantities of bion are dominant in the red tide. During the whole process from the beginning to their dying out for every specie, in situ spectral measurements were carried out. After data processing, characteristic spectra of red tide of different dominant species are got. Via comparison and analysis of characteristics of different spectra, we find that in the band region between 685 and 735 nanometers, spectral characteristics of red tide is apparently different from that of normal water. Compared to spectra of normal water, spectra of red tide have a strong reflectance peak in the above band region. As to spectra of red tide dominated by different species, the situations of reflectance peaks are also different: the second peak of Mesodinium rubrum spectrum lies between 726~732 nm, which is more than 21nm away from the other dominant species spectra’s; Leptocylindrus danicus’s second spectral peak covers 686~694nm; that of Skeletonema costatum lies between 691~693 nm. Chattonella marina’s second spectral peak lies about 703~705 nm. Thus we can try to determine whether red tide has occurred according to its spectral data. In order to monitor the event of red tide and identify the dominant species by the application of the technology of hyperspectral remote sensing, acquiring spectral data of different dominant species of red tide as much as possible becomes a basic work to be achieved for spectral matching, information extraction and so on based on hyperspectral data.

Paper Details

Date Published: 8 May 2003
PDF: 8 pages
Proc. SPIE 4892, Ocean Remote Sensing and Applications, (8 May 2003);
Show Author Affiliations
Tingwei Cui, First Institute of Oceanography, SOA (United States)
Jie Zhang, First Institute of Oceanography, SOA (China)
Key Lab. of Marine Science and Numerical Modeling, SOA (China)
Hongliang Zhang, Monitoring Ctr. of North China Sea, SOA (China)
Key Lab. of Marine Science and Numerical Modeling, SOA (China)
Yi Ma, First Institute of Oceanography, SOA (China)
Institute of Oceanology (China)
Xuemin Gao, Institute of Oceanology (China)

Published in SPIE Proceedings Vol. 4892:
Ocean Remote Sensing and Applications
Robert J. Frouin; Yeli Yuan; Hiroshi Kawamura, Editor(s)

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