湛江近海有色溶解有机物遥感反演Remote Sensing Retrieval of Colored Dissolved Organic Matter in Zhanjiang Coastal Area
余果,付东洋,钟雅枫,刘大召,祁雅莉,罗亚飞
摘要(Abstract):
【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R_(rs)(665)/R_(rs)(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。
关键词(KeyWords): 湛江近海;有色溶解有机物;Sentinel-2;遥感反演
基金项目(Foundation): 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)
作者(Author): 余果,付东洋,钟雅枫,刘大召,祁雅莉,罗亚飞
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