| 引用本文: | 吴传庆,杨志峰,王桥,刘晓曼,万华伟,王昌佐,厉青.叶绿素a浓度的动态峰反演方法.湖泊科学,2009,21(2):223-227. DOI:10.18307/2009.0210 |
| WU Chuanqing,YANG Zhifeng,WANG Qiao,LIU Xiaoman,WAN Huawei,WANG Changzuo,LI Qing.A reverse method of chlorophyll-a based on dynamic apex. J. Lake Sci.2009,21(2):223-227. DOI:10.18307/2009.0210 |
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| 叶绿素a浓度的动态峰反演方法 |
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吴传庆1,2, 杨志峰1, 王桥2, 刘晓曼2, 万华伟2, 王昌佐2, 厉青2
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1.北京师范大学环境学院, 北京 100875;2.环境保护部环境卫星中心筹备办公室, 北京 100029
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| 摘要: |
| 叶绿素a是影响内陆水体光学特性的主要水色要素之一.作为反映水体富营养化程度的重要参数指标,国内外学者发展了大量的算法和模型进行水体中叶绿素a浓度的遥感反演.这些算法均使用固定的波段位置.叶绿素a的特征谱段随着其浓度的变化存在一定的位移,尤其是701nm反射峰,其存在着明显的"红移"现象,因此使用固定波段势必带来一定的误差.通过对不同叶绿素a浓度水样的光谱曲线分析,提出动态峰反演叶绿素a浓度的方法.使用反射峰范围最大值和吸收谷范围最小值,而不是固定波长位置进行建模,以求获得更高的反演精度. |
| 关键词: 叶绿素a 反演 动态峰 |
| DOI：10.18307/2009.0210 |
| 分类号: |
| 基金项目:国家自然科学基金项目(40671134);中国科学院知识创新工程重要方向项目(KZCX3-SW-350)联合资助 |
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| A reverse method of chlorophyll-a based on dynamic apex |
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WU Chuanqing1,2, YANG Zhifeng1, WANG Qiao2, LIU Xiaoman2, WAN Huawei2, WANG Changzuo2, LI Qing2
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1.School of Environmental Sciences, Beijing Normal University, Beijing 100875, P. R. China;2.Environmental Satellite Center Preparing Office, Ministry of Environmental Protection of the People's Republic of China, Beijing 100029, P. R. China
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| Abstract: |
| Chlorophyll-a is one of the main water color elements which affect inland water optical properties, and it is the important parameter reflecting water eutrophic level. In the recent years, many methods and models are developed to retrieve Chl.a concentration. These methods or models all uses immobile bands. However, characteristic bands of chlorophyll-a move with the concentration changes. Especially, phenomenon of red-shift effect occurs obviously at 701nm reflective peak. As a result, using immobile bands to retrieve Chl.a concentration must bring some errors. In order to obtain higher precision, author in this article analyzed water spectra with different Chl.a concentrations and brings forward a new method of using dynamic apex to retrieve the Chl.a concentrations. |
| Key words: Chlorophyll-a retrival dynamic apex |
