Remote sensing estimation of the concentration and sources of coloured dissolved organic matter based on MODIS: A case study of Erhai lake
文献类型：期刊论文
| 作者 | Zhang, Hao2,3 ; Yao, Bo1; Wang, Shengrui2,3; Wang, Guoqiang2
|
| 刊名 | ECOLOGICAL INDICATORS
 |
| 出版日期 | 2021-11-01 |
| 卷号 | 131页码:12 |
| ISSN号 | 1470-160X |
| 关键词 | CDOM Fluorescence index Empirical algorithm Semi-empirical algorithm Erhai Lake |
| DOI | 10.1016/j.ecolind.2021.108180 |
| 通讯作者 | Wang, Shengrui(wangsr@bnu.edu.cn) |
| 英文摘要 | The use of satellite remote sensing to estimate coloured dissolved organic matter (CDOM) and identify its potential sources is important for monitoring lake water quality and implementing management strategies. In this study, taking Erhai Lake as an example and based on MODIS/Aqua satellite images and in-situ measured data, we used empirical and semi-empirical methods to develop algorithms for CDOM and the fluorescence index (FI370) from remote sensing reflectance (Rrs(lambda)). The temporal and spatial distributions of the CDOM concentration and FI370 in Erhai Lake during 2013-2019 were retrieved. The results show the following. (1) The band ratio (Rrs (469)+Rrs(645))/Rrs(555) model could estimate the CDOM absorption coefficient at 412 nm (aCDOM(412)) (R2=0.507), and it was relatively stable. Using the band ratio Rrs(645)/Rrs(469) combined with the chlorophylla (Chl-a) APProach by ELimination (APPEL) model, a semi-empirical inversion model of FI370 performed with satisfactory accuracy (R2=0.550) and was more accurate than the empirical algorithm (R2=0.505). (2) During the period of 2013-2019, the CDOM concentration in Erhai Lake generally decreased from the northern to the central to the southern parts of the lake, and the CDOM concentration was higher in summer and autumn than in spring and winter. FI370 was higher in the northern and western coastal waters and lower in the central, southern and eastern parts of the lake. FI370 in autumn and winter was higher than that in spring and summer. CDOM was affected by both terrestrial and internal sources, and their relative contributions were not the same in different seasons. (3) For different Chl-a concentrations, different CDOM concentration models had better retrieval effects, i.e., Rrs(645))/Rrs(555) and (Rrs(469)+Rrs(645))/Rrs(555) had the best performance when Chl-a 10 mu g/L and Chl-a 10 mu g/L, respectively. The inversion models established in this study offer improved quantifications of the CDOM concentration and the FI370 in Erhai Lake, providing important support for monitoring water quality and implementing efficient management strategies. |
| WOS关键词 | IMAGING SPECTRORADIOMETER MODIS ; OPTICAL-PROPERTIES ; COASTAL WATERS ; CDOM ABSORPTION ; CHLOROPHYLL-A ; TROPHIC STATE ; CARBON ; MODELS ; SEA ; DYNAMICS |
| 资助项目 | National Natural Science Foundation of China[U1902207] ; Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed[2020-02-2-W2] ; Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed[2020-02-2-W3] ; National Major Science and Technology Program for Water Pollution Control and Treatment[2018ZX07701001-17] ; China Postdoctoral Science Foundation[2019M660521] |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000704554400005 |
| 资助机构 | National Natural Science Foundation of China ; Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed ; National Major Science and Technology Program for Water Pollution Control and Treatment ; China Postdoctoral Science Foundation |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/87584]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 通讯作者 | Wang, Shengrui |
| 作者单位 | 1.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China 2.Beijing Normal Univ, Coll Water Sci, Engn Res Ctr, Minist Educ Groundwater Pollut Control & Remediat, Beijing 100875, Peoples R China 3.Beijing Normal Univ, Ctr Water Res, Guangdong Hong Kong Joint Lab Water Secur, Zhuhai 519087, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Hao,Yao, Bo,Wang, Shengrui,et al. Remote sensing estimation of the concentration and sources of coloured dissolved organic matter based on MODIS: A case study of Erhai lake[J]. ECOLOGICAL INDICATORS,2021,131:12. |
| APA | Zhang, Hao,Yao, Bo,Wang, Shengrui,&Wang, Guoqiang.(2021).Remote sensing estimation of the concentration and sources of coloured dissolved organic matter based on MODIS: A case study of Erhai lake.ECOLOGICAL INDICATORS,131,12. |
| MLA | Zhang, Hao,et al."Remote sensing estimation of the concentration and sources of coloured dissolved organic matter based on MODIS: A case study of Erhai lake".ECOLOGICAL INDICATORS 131(2021):12. |
入库方式： OAI收割
来源：力学研究所
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