| 基于MERSI和MODIS的太湖水体叶绿素a含量反演 |
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| 引用本文： | 韩秀珍,郑伟,刘诚,安思颖.基于MERSI和MODIS的太湖水体叶绿素a含量反演[J].地理研究,2011,30(2):291-300. |
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| 作者姓名： | 韩秀珍 郑伟 刘诚 安思颖 |
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| 作者单位： | 中国气象局国家卫星气象中心; |
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| 基金项目： | 基于风云三号数据的太湖蓝藻水华监测模型研究(40801176/D010702); 浙江省科技厅项目(2009C33071) |
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| 摘 要： | 水体叶绿素a含量的遥感反演是监测水体光学特性、评价水体污染的一个重要指标.本文以FY-3A/MERSI和AQUA/MODIS遥感影像为数据源,结合水体实测的叶绿索a含量,利用两类反射率模型,研究星载数据遥感反演叶绿素a的可行性.研究表明:基于FY-3A/MERSI和AQUA/MODIS可见光-近红外通道的光谱反演模型(...
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| 关 键 词： | FY-3A/MERSI AQUA/MODIS 叶绿素a含量 卫星遥感 |
| 收稿时间： | 2010-07-22 |
| 修稿时间： | 2010-11-18 |
Estimation of chlorophyll-a using MERSI and MODIS images in Taihu Lake, China |
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| HAN Xiu-zhen,ZHENG Wei,LIU Cheng,AN Si-ying.Estimation of chlorophyll-a using MERSI and MODIS images in Taihu Lake, China[J].Geographical Research,2011,30(2):291-300. |
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| Authors: | HAN Xiu-zhen ZHENG Wei LIU Cheng AN Si-ying |
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| Institution: | HAN Xiu-zhen,ZHENG Wei,LIU Cheng,AN Si-ying National Satellite Meteorological Center,China Meteorological Administration,Beijing,100081,China |
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| Abstract: | The Chlorophyll-a (Chl-a) concentrations in water are of great importance to the monitoring of water quality and ecosystem balance. Remote sensing offers a convenient and systematical tool for the observations of water at a long time scale. In this paper, we present a study of Chl-a estimation using the reflectance models (MOD3: Rλ1-1-Rλ2-1)×Rλ3and MOD2:Rλ1-1×Rλ3) derived from the Medium Resolution Spectral Image (MERSI) onboard the newly launched FY-3A satellite and the Moderate Imaging Spectroradiometer (MODIS) onboard the AQUA platforms. Validation studies demonstrated that both models provided reliable estimates of Chl-a concentrations with determination coefficients R2 of 0.72~0.79 (MOD2) and 0.52~0.76 (MOD3) for MERSI standard band settings. This accuracy is slightly better than that of the MODIS results with R2 of 0.65~0.69 and 0.43~0.70 for MOD2 and MOD3, respectively. Comparison analysis between models and sensors indicated that the blue and near infrared wave ranges are of potential for Chl-a estimation. Besides, the higher spatial resolution of MERSI (250m) may explain the better performance for both models compared to that of MODIS. This research will be helpful for the development of future Chl-a estimation models using the satellite observations. |
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| Keywords: | MERSI MODIS Chl-a remote sensing |
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