| Hyperspectral retrieval model of phycocyanin in case Ⅱ waters |
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| 作者姓名： | YANG Dingtian PAN Delu |
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| 作者单位： | [1]LED, South China Sea Institute of Oceanography, Guangzhou 510301, China [2]State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, SOA, Hangzhou 310012, China |
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| 基金项目： | Acknowledgements The authors would like to thank Dr. Zhang Ytmlin for measuring absorption of blue-green algae, and Zhang Xiaoyu, Zhang Xiaofeng, Liu Tao for field measurements. This work was supported by the National Natural Science Foundation of China （Grant No. 40576078）, and Natural Science Foundation of Guangdong Province （Grant No. 5003685）. |
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| 摘 要： | Phycocyanin, a functional protein found in blue-green algae, with characteristic absorption peak around 620 nm, can be used to detect the quantity of blue-green algae in waters. Spectral characteristics of phycocyanin were studied by measuring hyperspectral water leaving radiance and absorption curve, and the results showed that the absorption peak of phycocyanin around 620 nm was evident in the curve of water leaving radiance. Bio-optical model of phycocyanin was set up with analytical methods and calibrated with error analysis. Linear relationship between phycocyanin concentration measured and that retrieved with calibrated bio-optical model （R = 0.755） was better than that retrieved with the band ratio of 709 nm/620 nm （R = 0.729）, which proved that the calibration was necessary for improving the accuracy of phycocyanin concentration.
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| 关 键 词： | 蓝绿藻 藻青蛋白 遥感模型 Ⅱ类水体 水质 高光谱检索模型 |
| 收稿时间： | 2006-04-10 |
| 修稿时间： | 2006-04-102006-07-27 |
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