| 湛江近海有色溶解有机物遥感反演 |
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| 引用本文： | 余果,付东洋,钟雅枫,刘大召,祁雅莉,罗亚飞.湛江近海有色溶解有机物遥感反演[J].广东海洋大学学报,2021(1). |
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| 作者姓名： | 余果 付东洋 钟雅枫 刘大召 祁雅莉 罗亚飞 |
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| 作者单位： | 广东海洋大学电子与信息工程学院;南方海洋科学与工程广东省实验室（湛江）南海资源大数据中心;广东省海洋遥感与信息技术工程技术中心 |
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| 基金项目： | 广东省教育厅重点研究项目(2019KZDXM019);南方海洋科学与工程广东省实验室(湛江)资助项目(ZJW-2019-08);广东海洋大学高水平海洋学科团队项目(002026002009);广东省研究生学术论坛项目(230420003);广东海洋大学2019年“冲一流”学科建设平台项目(231419026)。 |
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| 摘 要： | 【目的】比较分析湛江近海有色溶解有机物(CDOM)的不同反演算法,并将最佳算法应用于卫星遥感数据,了解湛江近海CDOM空间分布。【方法】基于湛江湾及邻近海域的海上观测资料,利用QAA-E、QAA-Dong和QAA-CDOM三种经典半分析算法以及经验算法反演湛江近海CDOM浓度。【结果与结论】QAA-CDOM算法在三种经典半分析算法中精度最高,平均相对误差(MRE)为28.8%,均方根误差(RMSE)为0.07。同时,利用Rrs(665)/Rrs(444)与a_g(440)进行回归分析,建立CDOM反演的经验算法,决定系数为0.65,验证点的MRE为26.5%,RMSE为0.07。将经验算法应用到Sentinel-2卫星数据,得到CDOM反演空间分布图,显示鉴江口CDOM浓度较高,而硇洲岛附近及离岸较远的海域CDOM浓度较低。
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| 关 键 词： | 湛江近海 有色溶解有机物 Sentinel-2 遥感反演 |
Remote Sensing Retrieval of Colored Dissolved Organic Matter in Zhanjiang Coastal Area |
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| YU Guo,FU Dong-yang,ZHONG Ya-feng,LIU Da-zhao,QI Ya-li,LUO Ya-fei.Remote Sensing Retrieval of Colored Dissolved Organic Matter in Zhanjiang Coastal Area[J].Journal of Zhanjiang Ocean University,2021(1). |
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| Authors: | YU Guo FU Dong-yang ZHONG Ya-feng LIU Da-zhao QI Ya-li LUO Ya-fei |
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| Institution: | (College of Electronic and Information Engineering,Guangdong Ocean University,Zhanjiang 524088,China;Marine Resources Big Data Center of South China Sea,Southern Marine Science and Engineering Guangdong Laboratory(Zhanjiang),Zhanjiang 524025,China;Provincial Engineering and Technology Research Center of Marine Remote Sensing and Information Technology,Zhanjiang 524088,China) |
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| Abstract: | 【Objective】This study compares and analyzes different retrieval algorithms of CDOM in the Zhanjiang coastal area,and applies the best algorithm to satellite remote sensing data.【Method】Based on the observed data of Zhanjiang Bay and its adjacent waters,three classic semi-analytical algorithms,QAA-E,QAA-Dong and QAA-CDOM,and empirical algorithms are used to retrieve the concentration of CDOM in Zhanjiang coastal area.【Result and Conclusion】The accuracy of the QAA-CDOM algorithm is the highest among the three algorithms,and the mean relative error(MRE)is 28.8%,the root mean square error(RMSE)is 0.07.The Rrs(665)/Rrs(444)and ag(440)were used for regression analysis and the empirical algorithm of CDOM retrieval is established.The determination coefficient is 0.65,the MRE of verification point is 26.5%,and the RMSE is 0.07.The empirical algorithm is applied to Sentinel-2 satellite data to obtain the spatial distribution map of CDOM.The result shows that the CDOM concentration in Jianjiang Estuary is relatively high but it is relatively low in the waters near Naozhou Island and far offshore. |
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| Keywords: | Zhanjiang coastal area colored dissolved organic matter Sentinel-2 remote sensing retrieval |
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