| 非色素物质吸收光谱拟合方法比较 |
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| 引用本文： | 曾银东,商少凌,吴璟瑜,胡传民,李炎.非色素物质吸收光谱拟合方法比较[J].厦门大学学报(自然科学版),2006,45(3):388-392. |
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| 作者姓名： | 曾银东 商少凌 吴璟瑜 胡传民 李炎 |
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| 作者单位： | 1. 近海海洋环境科学国家重点实验室(厦门大学),福建,厦门,361005
2. 南佛罗里达大学,海洋科学学院,St.Petersburg,FL 33701,USA |
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| 基金项目： | 国家科技攻关项目，中国科学院资助项目，国家高技术研究发展计划(863计划) |
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| 摘 要： | 有色溶解有机物质(CDOM)与非色素颗粒物质的吸收皆有随波长增高而类指数函数递减的特征,二者统称非色素物质吸收,其光谱斜率S是海洋水色遥感半分析算法中的一个重要参数.本文基于现场实测数据,比较3种获取该参数的拟合方法,结果表明,增加背景参数K的非线性方法能够有效校正长波段散射的影响,与利用自然对数-线性方法以及一般非线性方法(不含背景参数K)比较,R2的标准偏差(SD)小,受水体类型的影响小.这一结果对于半分析算法的发展具有应用价值.
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| 关 键 词： | 半分析算法 非色素物质吸收 光谱斜率 拟合方法 |
| 文章编号： | 0438-0479(2006)03-0388-05 |
| 收稿时间： | 01 6 2006 12:00AM |
| 修稿时间： | 2006年1月6日 |
A Comparison of Different Fitting Methods for Non-pigment Absorption Spectra |
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| ZENG Yin-dong,SHANG Shao-ling,WU Jing-yu,HU Chuan-min,LI Yan.A Comparison of Different Fitting Methods for Non-pigment Absorption Spectra[J].Journal of Xiamen University(Natural Science),2006,45(3):388-392. |
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| Authors: | ZENG Yin-dong SHANG Shao-ling WU Jing-yu HU Chuan-min LI Yan |
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| Abstract: | The absorption of Color Dissolved Organic Matter(CDOM) and non-pigment particulate matter are usually integrated as non-pigment matter absorption because they both decrease approximately exponentially in UV-Visible range.The absorption spectra slope(S) of non-pigment matter is a key parameter for ocean color semi-analytical algorithm development.Three fitting methods for non-pigment absorption to derive S are compared in this paper,which are a linear method and a non-linear method both with null correction at 700 nm,as well as another non-linear method with a background parameter K.It is found that the non-linear method with K has the best fitting results with the lowest SD of R~2 and small residual in the whole spectra range(350~650 nm) for different waters. |
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| Keywords: | semi-analytical algorithm non-pigment absorption spectra slope fitting methods |
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