| 引用本文: | 赵晨露,马荣华,郝景燕,段洪涛.太湖水体吸收分解(Ⅱ):浮游植物色素吸收分解.湖泊科学,2012,24(6):905-913. DOI:10.18307/2012.0614 |
| ZHAO Chenlu,MA Ronghua,HAO Jingyan,DUAN Hongtao.The absorption spectral decomposition of water in Lake Taihu, China (Ⅱ):the decomposition of absorption due to phytoplankton pigments. J. Lake Sci.2012,24(6):905-913. DOI:10.18307/2012.0614 |
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| 摘要: |
| 蓝藻水华暴发前,浮游植物群类结构的变化可通过其指示型色素的浓度变化来反映.为了同时反演叶绿素a、叶绿素b(绿藻门指示型色素)、叶绿素c(硅藻门指示型色素)和藻蓝素(蓝藻门的指示型色素)的浓度,利用偏最小二乘回归构建线性模型,通过2011年太湖实测吸收数据,较为准确地反演了叶绿素a和藻蓝素的浓度;针对无明显优势藻的春季数据集较为准确地反演了叶绿素b和叶绿素c的浓度.相对于经典最小二乘算法,偏最小二乘法在多色素混合的吸收光谱分析上更为有效.通过反演指示性色素浓度来反映藻类的分布,为富营养化湖泊主要藻类时空分布变化的遥感监测提供了一定的理论与技术支持. |
| 关键词: 太湖 吸收分解 浮游植物色素 偏最小二乘 |
| DOI：10.18307/2012.0614 |
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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(KZCX2-YW-QN311、KZCX2-EW-QN308);国家自然科学基金项目(41171273,41171271)联合资助 |
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| The absorption spectral decomposition of water in Lake Taihu, China (Ⅱ):the decomposition of absorption due to phytoplankton pigments |
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ZHAO Chenlu1,2, MA Ronghua1, HAO Jingyan1,2, DUAN Hongtao1
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1.Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.Graduate University of Chinese Academy of Science, Beijing 100049, P. R. China
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| Abstract: |
| Concentrations of pigments could reflect the dominant phyla of algae. Investigations of algae in eutrophic lakes revealed that Chl. b, Chl. c and phycobilin (PC) are the critical pigments of chlorophyta, bacilliariphyta and cyanophyta, respectively. In this study, partial least square (PLS) regress was used on the retrieval of Chl. a, Chl. b, Chl. c and PC through absorption spectral of phytoplankton. Retrieve of Chl. a was based on the data collected in situ during 2011. Retrieve of Chl. b and Chl. c was based on the data collected in situ in March, since there is no significant dominant phyla of algae in spring. Result shows that PLS is a more effective method than the original least square regress and could be of help for remote sensing of multi-pigments and the distribution of main algae in eutrophic lakes. |
| Key words: Lake Taihu absorption decomposition phytoplankton pigment partial least square |
