赤潮的高光谱监测及预警方法

doi:10.11978/j.issn.1009-5470.2010.02.017

热带海洋学报 ›› 2010, Vol. 29 ›› Issue (2): 17-24.doi: 10.11978/j.issn.1009-5470.2010.02.017cstr: 32234.14.j.issn.1009-5470.2010.02.017

赤潮的高光谱监测及预警方法

曹文熙1, 杨跃忠1, 王桂芬1, 赵俊1,2, 周雯1, 李彩1, 孙兆华1,2, 梁少君1,2, 柯天存1, 卢桂新1

1. 中国科学院南海海洋研究所热带海洋环境动力学实验室, 广东广州 510301; 2. 中国科学院研究生院, 北京 100039

收稿日期:2009-05-06 修回日期:2009-11-18 出版日期:2010-03-23 发布日期:2010-03-23
作者简介:曹文熙(1963—), 男, 湖南省郴州市人, 研究员, 博士, 主要从事海洋光学研究。
基金资助:
中国科学院重要方向性项目及装备项目(KZCW2-YW-215); 国家863计划重大项目(2006AA09A310); 国家自然科学
基金-广东省自然科学基金联合资助项目(U0933005)

Hyperspectral monitoring and early warning for algal blooms

CAO Wen-xi1, YANG Yue-zhong1, WANG Gui-fen1, ZHAO Jun1,2, ZHOU Wen1, LI Cai1, SUN Zhao-hua1,2, LIANG Shao-jun1,2, KE Tian-cun1, LU Gui-xin1

1. LED, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; 2. Graduate Univ. of Chinese Academy of Sciences, Beijing 100039, China

Received:2009-05-06 Revised:2009-11-18 Online:2010-03-23 Published:2010-03-23

摘要/Abstract

摘要：

有害赤潮发生频度有逐年增加的趋势, 建设赤潮的早期监测和预警系统是一个难点。文章研究表明, 珠江口赤潮前后, 叶绿素a浓度和细胞密度变化范围分别为0.9—31.1mg•m-3 和1.28×104 —1.76×106cell•L-1, 优势藻为聚生角毛藻; 高光谱辐射计获取的光漫射衰减系数、遥感反射率和荧光强度可反演叶绿素a浓度和细胞密度, 其中反演叶绿素a浓度的平均相对均方根差(RRMS)为30.6%、33.8%和77.4%, 而反演细胞密度的平均RRMS为83.6%、83.9%和136.4%。因高光谱辐射计可以获取每小时或者更短时间尺度的数据, 因此, 装备了高光谱辐射计的光学浮标可用于赤潮监测与预警系统。

关键词: 海洋光学, 光学浮标, 监测及预警, 赤潮

Abstract:

Harmful algal blooms have increased in recent years, and the building of early observing and monitoring system is very difficult. The authors indicated in this paper that, during the experimental time in the Pearl River Estuary, the variations of chlorophyll a and cell density were 0.9-31.1mg•m-3 and 1.28×104-1.76×106cell•L-1, respectively, and diatom was the dominant algal species. The diffuse attenuation coefficient, remotely sensed reflectance and fluorescence obtained by hyperspectral radiometers can be used to retrieve chlorophyll a and cell density, with relative root mean square error (RRMS) of chlorophyll a of 26.1%, 25.2% and 54.6%, and RRMS of cell density of 64.5%, 65.6% and 60.8%, respectively. Since the hyperspectal radiometers can obtain data at 1 hour interval, the moored optical buoy equipment with hyperspectral radiometers can be used for algal bloom observation and monitoring system.

Key words: ocean optics, optical buoy, observation and monitoring, algal bloom

曹文熙,杨跃忠,王桂芬,赵俊,周雯,李彩,孙兆华,梁少君,柯天存,卢桂新. 赤潮的高光谱监测及预警方法[J]. 热带海洋学报, 2010, 29(2): 17-24.

CAO Wen-xi,YANG Yue-zhong,WANG Gui-fen,ZHAO Jun,ZHOU Wen,LI Cai,SU. Hyperspectral monitoring and early warning for algal blooms[J]. Journal of Tropical Oceanography, 2010, 29(2): 17-24.

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赤潮的高光谱监测及预警方法

Hyperspectral monitoring and early warning for algal blooms

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