| 有色溶解有机物吸收光谱模型对比 |
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| 引用本文： | 姜广甲,刘殿伟,宋开山,王宗明,张柏.有色溶解有机物吸收光谱模型对比[J].湖泊科学,2010,22(3):383-390. |
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| 作者姓名： | 姜广甲 刘殿伟 宋开山 王宗明 张柏 |
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| 作者单位： | 1. 中国科学院东北地理与农业生态研究所,长春,130012;中国科学院研究生院,北京,100049
2. 中国科学院东北地理与农业生态研究所,长春,130012 |
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| 基金项目： | 中国科学院知识创新工程重要方向性项目，吉林省科技发展计划重点项目 |
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| 摘 要： | 利用6种统计模型对吉林省石头口门水库、松花湖CDOM吸收光谱曲线(350-650nm)进行拟合,从统计F值大小和归一化残差两个角度均证明双曲线模型效果最好;采用15个波段范围拟合CDOM吸收均值光谱斜率S,单指数模型S值变化幅度较大,平均变异系数为12.41%;而双曲线模型S值相对稳定,变异系数为5.85%.将双曲线模型应用于生物光学模型,研究表明双曲线模型可以反映CDOM时空变化规律和物质组成;且双曲线模型拟合光谱斜率S值与CDOM特征波长吸收具有很好的负相关关系,呈幂指数递减,决定系数达0.8137.
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| 关 键 词： | 双曲线模型 光谱斜率 石头口门水库 松花湖 |
| 收稿时间： | 2009/7/13 0:00:00 |
| 修稿时间： | 2009/11/11 0:00:00 |
Comparison of spectral models for absorption coefficient of colored dissolved organic matter |
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| JIANG Guangji,LIU Dianwei,SONG Kaishan,WANG Zongming and ZHANG Bai.Comparison of spectral models for absorption coefficient of colored dissolved organic matter[J].Journal of Lake Science,2010,22(3):383-390. |
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| Authors: | JIANG Guangji LIU Dianwei SONG Kaishan WANG Zongming and ZHANG Bai |
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| Institution: | The Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, P. R. China;Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R. China,The Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, P. R. China,The Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, P. R. China,The Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, P. R. China and The Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, P. R. China |
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| Abstract: | Six statistics models are presented based on the four cruises (2 cruises in Shitoukoumen Reservoir in June, September, and 2 cruises in Lake Songhua in July, September). The dataset including 94 sampling sites was used to fit the spectral slope of colored dissolved organic matter (CDOM) absorption over the range of 350 - 650nm. The result shows that the Hyperbola Model ( HM ) is the best fitting model with the best F value and normalized residuals. The spectral slope S is calculated over different ranges of wavelength. The 5 values for Single Exponential Model (SEM) change markedly while steadily for the HM by ways of comparing the variation coefficients. The variation coefficients are 12.41% and 5.85% for SEM and HM, respectively. So HM is better to fit the spectra curves of CDOM absorption than SEM. HM is applied to the CDOM bio-optical model in the form of ag(λ) = ag (440) (λ/440)s , and it proves that HM can response to the changes in temporal and spatial variation and the source of CDOM. There is a steady inverse relationship between 5 and absorption of CDOM at 440nm for HM. Four fitting methods are analyzed, such as liner, exponent, logarithm and power index. It is obvious that the power index is the best with a determination coefficient of 0.8137. |
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| Keywords: | CDOM CDOM Hyperbola Model spectral slope Shitoukoumen Reservoir Lake Sonhua |
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