黄河口海域颗粒有机碳浓度遥感反演与时空分布特征  

Remote Sensing Retrieval and Temporal-Spatial Distribution Characteristics of Particulate Organic Carbon Concentration in Seawater Near Yellow River Estuary

作　　者：牟冰[1] 崔廷伟 秦平[1] 巩加龙 肖艳芳[2] 郑荣儿[1] 

机构地区：[1]中国海洋大学信息科学与工程学院,山东青岛266100 [2]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《光学学报》2017年第8期26-36,共11页Acta Optica Sinica

基　　金：国家自然科学基金(41606197;41476101;41476159;41506203);全球变化与海气相互作用专项任务(GASI-03-03-01-01);中韩海洋科学共同研究中心项目(PI-2017-3);广东省自然科学基金青年基金(2014A030310287);热带海洋国家重点实验室(中国科学院南海海洋研究所)开放课题(LT01509);中央级公益性科研院所基本科研业务费专项(PM-zx703-201601-014)

摘　　要：基于黄河口海域实测数据,建立了利用745nm(模型1)和680nm(模型2)波段遥感反射率的颗粒有机碳(POC)浓度反演模型,得到的平均相对误差(APD)均低于26%,其中模型1表现更优。结合海洋水色成像仪(GOCI)影像和实测数据对两个模型进行了精度评估,平均相对误差均在30%以内。基于所建立的模型和卫星遥感影像,分析了逐时、大风过程(几日之间)、季节变化三种情况下黄河口海域POC浓度的时空变化特征。结果表明,冬季POC浓度整体较高,夏季POC浓度整体较低;渤海湾附近出现POC浓度最高值。三种情况下,POC浓度的变化范围在同一尺度上,表明短时间间隔并不意味着POC浓度变化范围也小,其季节平均效应是显著的。Two particulate organic carbon（POC）concentration retrieval models are developed with remote sensing reflectance at 745nm（model 1）and 680nm（model 2）based on the data collected near the Yellow River Estuary.The average percentage differences（APD）of the two models are less than 26%,and model 1 performs better.Accuracy evaluation is carried out with geostationary ocean color imager（GOCI）images and the measured data,and the average relative error is less than 30%.The developed models are used to analyze the temporal and spatial variation of POC concentration in the seawater near the Yellow River Estuary on the time scales of hour,day（for strong wind process）and season,respectively.The results show that the POC concentration is high in winter,and the POC concentration is low in summer.The peak value of POC concentration is found near the Bohai Bay.The variations of POC concentration are of the same order of magnitude under the three conditions,which shows that the obvious change of POC concentration may happen even in shorter time scale,while the seasonal mean effect is significant.

关 键 词：海洋光学 颗粒有机碳 遥感反演 黄河口 时空分布 

分 类 号：P733.3[天文地球—物理海洋学]