基于光谱差异的东海赤潮提取算法  

A new algorithm of red tide monitoring based on the spectral differences in the East China Sea

作　　者：徐晓晖[1,2,3] 毛志华[2] 陶邦一[2] 

机构地区：[1]中国科学院南海海洋研究所,广东广州510301 [2]国家海洋局第二海洋研究所,浙江杭州310012 [3]中国科学院大学,北京100049

出　　处：《海洋学研究》2013年第2期26-34,共9页Journal of Marine Sciences

基　　金：国家"863"计划重点资助项目(2007AA092002)

摘　　要：赤潮是最严重的海洋灾害之一,它不仅破坏海洋渔业生产、恶化海洋环境、影响滨海旅游业,而且还会影响人类健康。东海是我国赤潮灾害的"高发区",赤潮发生次数和面积均明显高于其它海区。遥感是赤潮监测的最有效的手段之一,从光谱曲线可以看出,赤潮水体和非赤潮水体光谱曲线有明显的区别,前者呈现出2个吸收峰和2个反射峰,而后者不具备该特征。基于光谱差异,本文提出了1种新的赤潮提取算法:Rrs555/Rrs488>1.5且Rrs678-Rrs667>0。该算法能有效地确定卫星数据中赤潮的位置,与公报的赤潮位置吻合得较好。因此,该算法适用于卫星数据的东海赤潮信息提取。Red tide is one of the most serious marine hazards.It not only destroys marine fishery production,deteriorates the marine environment,affects coastal tourist industry,but also causes human health problems.The East China Sea is the region of the ＂high incidence＂ of the red tide disaster in China： both in the frequency and the area are significantly higher than others.Remote sensing technology has been proved to be one of the most effective means of red tide monitoring.From the spectral curves,we can see that the spectral of the red tide water and non-red tide water has significant difference： there are two peaks and two valleys in red tide water,while there are no these two peaks and two valleys in non-red tide water.Based on the spectral differences,a new algorithm was developed with conditions of Rrs 555/ Rrs 488 1.5,and Rrs 678-Rrs 667 0 to extract the red tide information.The algorithm can determine effectively the locations from satellite data of red tide,and it is good corresponding to the results in the official bulletin.Therefore,this algorithm is suitable to monitor the red tide from satellite data in the East China Sea.

关 键 词：光谱 赤潮 MODIS 东海 

分 类 号：X55[环境科学与工程—环境工程]