| HY-1C卫星海岸带成像仪叶绿素a浓度反演研究 |
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| 引用本文： | 滕越,邹斌,叶小敏.HY-1C卫星海岸带成像仪叶绿素a浓度反演研究[J].海洋学报,2022,44(5):25-34. |
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| 作者姓名： | 滕越 邹斌 叶小敏 |
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| 作者单位： | 1.国家海洋环境预报中心，北京 100081 |
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| 基金项目： | 民用航天技术预先研究项目（D040107）； |
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| 摘 要： | 叶绿素a作为最重要的水质参数之一，是评价水体富营养化和初级生产力状况的主要因素。我国海洋一号C（HY-1C）卫星海岸带成像仪（CZI）具有高时空分辨率的观测优势。本文基于东海和南海现场实测数据建立了HY-1C卫星CZI叶绿素a浓度反演模型并在实测水域进行反演，与MODIS叶绿素a浓度反演产品进行了对比验证，应用CZI叶绿素a浓度模型在珠江口、长江口、渤海湾水域进行了叶绿素a浓度反演示例试验。结果表明，叶绿素a浓度模型估算浓度与实测浓度相关系数为0.774 3，平均相对误差为24.58%，利用实测叶绿素a浓度对模型进行精度验证，相关系数达到0.993 9，平均相对误差为18.49%。模型在实测水域反演得到的叶绿素a浓度分布与MODIS叶绿素a浓度产品分布大体一致。在珠江口水域反演得到叶绿素a浓度空间分布为由西北向东南逐级递减，峰值出现在珠江口西沿岸。在长江口、渤海湾反演叶绿素a浓度空间分布均符合地理实情。研究表明HY-1C卫星CZI数据可应用于中国近海水色定量化研究。
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| 关 键 词： | HY-1C卫星 海岸带成像仪 叶绿素a浓度 珠江口 |
| 收稿时间： | 2021-07-21 |
Study on the chlorophyll a concentration retrieved from HY-1C satellite coastal zone imager data |
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| Teng Yue,Zou Bin,Ye Xiaomin.Study on the chlorophyll a concentration retrieved from HY-1C satellite coastal zone imager data[J].Acta Oceanologica Sinica (in Chinese),2022,44(5):25-34. |
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| Authors: | Teng Yue Zou Bin Ye Xiaomin |
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| Institution: | 1.National Marine Environmental Forecasting Center, Beijing 100081, China2.National Satellite Ocean Application Service, Beijing 100081, China3.Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing 100081, China |
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| Abstract: | As one of the most important water quality parameters, chlorophyll a is an important indicator to evaluate the degree of eutrophication of water bodies and also the main factors of primary productivity state of the oceans. The coastal zone imager (CZI) onboard the Chinese Haiyang-1C (HY-1C) satellite has an advantage observation in high temporal and spatial resolution. In this study, a chlorophyll a concentration retrieval model for CZI onboard the HY-1C satellite is developed from the in-situ measurements in the East China Sea and the South China Sea. The chlorophyll a concentration is retrieved by the model in the measured waters and compared with MODIS chlorophyll a concentration. The chlorophyll a concentration also retrieved in the Zhujiang River Estuary, Changjiang River Estuary and Bohai Bay. The correlation coefficient between the predicted value of the model and the in-situ chlorophyll a concentration is 0.774 3, the average relative error is 24.58%. The accuracy of the model is verified with the in-situ measurements with the correlation coefficient of 0.993 9 and the average relative error of 18.49%. The distribution of chlorophyll a concentration retrieved from CZI is nearly the same as that of MODIS. The chlorophyll a concentration decreases gradually from northwest to southeast and the peak value locates on the west bank of the Zhujiang River Estuary. The inversion of chlorophyll a concentration in Changjiang River Estuary and Bohai Bay accords with the actual situation. The work in this study indicates that HY-1C satellite coastal zone imager data are useful for the monitoring of coastal ocean color in China. |
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